mass Quantity (Library of Units and Constants

Name:
bag-cement
(convert bag-cement to new units)

Metric (SI) Equivalent:
42.63768278 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
94 pounds-mass

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
barrel-cement
(convert barrel-cement to new units)

Metric (SI) Equivalent:
170.55073112 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
376 pounds-mass

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
carat
(convert carat to new units)

Abbreviation:
ct

Another Name:
metric-carat

Metric (SI) Equivalents:
0.2 grams
0.0002 kilograms

Metric (SI) Dimensions:
mass

Notes:
(1) Used for gemstone measurements
(2) The metric (SI) equivalents above are exact.

Name:
dram-mass
(convert dram-mass to new units)

Abbreviation:
drm

Other Names:
dr, dr-avdp, dram, dram-avoirdupois, drachm, drachm-avoirdupois

Belongs to:
dram-mass Group

Metric (SI) Equivalents:
1.7718451953 grams
0.0017718451953 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
pound-mass / 256

Note:
The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
dram-mass-troy
(convert dram-mass-troy to new units)

Abbreviation:
drm-troy

Other Names:
dr-troy, dr-ap, dram-troy, dram-apothecaries, drachm-troy, drachm-apothecaries

Belongs to:
dram-mass Group

Metric (SI) Equivalents:
3.8879346 grams
0.0038879346 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
pound-mass-troy / 96

Note:
The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
electron-mass
(convert electron-mass to new units)

Abbreviation:
m-e

Other Names:
natural-unit-of-mass, atomic-unit-of-mass

Metric (SI) Equivalent:
9.1093826e-31 kilograms

Standard Uncertainty:
1.6e-37 kilograms

Metric (SI) Dimensions:
mass

Note:
The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:
gamma-mass
(convert gamma-mass to new units)

Another Name:
gamma

Metric (SI) Equivalents:
1 micro gram
1e-09 kilograms

Metric (SI) Dimensions:
mass

Note:
The metric (SI) equivalents above are exact.

Name:
grain-mass
(convert grain-mass to new units)

Abbreviation:
grm

Metric (SI) Equivalents:
6.479891 centi grams
6.479891e-05 kilograms

Metric (SI) Dimensions:
mass

Notes:
(1) Apothecaries, avoirdupois, and troy unit
(2) The metric (SI) equivalents above are exact.

Name:
gram
(convert gram to new units)

Abbreviation:
g

Other Names:
gm, gramme

Metric (SI) Equivalent:
gram is a metric unit
0.001 kilograms

Metric (SI) Dimensions:
mass

Note:
The metric (SI) equivalent above is exact.

Name:
hundredweight
(convert hundredweight to new units)

Abbreviation:
cwt

Other Names:
hundredweight-CA, cental, cental-CA, hundredweight-short, short-hundredweight, hundredweight-net, net-hundredweight

Belongs to:
hundredweight Group

Metric (SI) Equivalent:
45.359237 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
100 pounds-mass

Notes:
(1) This unit is used in the United States.
(2) The "CA" suffix indicates that this unit is used in Canada.
(3) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
hundredweight-long
(convert hundredweight-long to new units)

Abbreviation:
cwt-lg

Other Names:
hundredweight-UK, long-hundredweight, hundredweight-gross, gross-hundredweight

Belongs to:
hundredweight Group

Metric (SI) Equivalent:
50.80234544 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
112 pounds-mass

Notes:
(1) The "UK" suffix indicates that this unit is used in the United Kingdom.
(2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
kilogram
(convert kilogram to new units)

Abbreviation:
kg

Another Name:
kilogramme

Metric (SI) Equivalent:
kilogram is a metric unit (in fact, it is a base SI unit)

Metric (SI) Dimensions:
mass

Name:
kip-mass
(convert kip-mass to new units)

Other Names:
kip, kilopound

Metric (SI) Equivalents:
0.45359237 tons-mass-metric
453.59237 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
1000 pounds-mass

Note:
The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
metric-slug
(convert metric-slug to new units)

Belongs to:
slug Group

Metric (SI) Equivalent:
9.80665 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
kilogram-force / (meter / second^2)

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
muon-mass
(convert muon-mass to new units)

Abbreviation:
m-mu

Metric (SI) Equivalent:
1.8835314e-28 kilograms

Standard Uncertainty:
3.3e-35 kilograms

Metric (SI) Dimensions:
mass

Note:
The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:
neutron-mass
(convert neutron-mass to new units)

Abbreviation:
m-n

Metric (SI) Equivalent:
1.67492728e-27 kilograms

Standard Uncertainty:
2.9e-34 kilograms

Metric (SI) Dimensions:
mass

Note:
The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:
ounce-mass
(convert ounce-mass to new units)

Abbreviation:
ozm

Other Names:
oz, oz-avdp, ounce, ounce-avoirdupois

Belongs to:
ounce-mass Group

Metric (SI) Equivalents:
28.349523125 grams
0.028349523125 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
pound-mass / 16

Note:
The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
ounce-mass-troy
(convert ounce-mass-troy to new units)

Abbreviation:
ozm-troy

Other Names:
oz-troy, oz-ap, ounce-troy, ounce-apothecaries

Belongs to:
ounce-mass Group

Metric (SI) Equivalents:
31.1034768 grams
0.0311034768 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
pound-mass-troy / 12

Note:
The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
pennyweight
(convert pennyweight to new units)

Abbreviation:
dwt

Metric (SI) Equivalents:
1.55517384 grams
0.00155517384 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
24 grains-mass

Notes:
(1) Troy unit
(2) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
Planck-mass
(convert Planck-mass to new units)

Metric (SI) Equivalent:
2.17645e-08 kilograms

Standard Uncertainty:
1.6e-12 kilograms

Metric (SI) Dimensions:
mass

Note:
The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:
point-mass
(convert point-mass to new units)

Another Name:
point

Metric (SI) Equivalents:
2 milli grams
2e-06 kilograms

Metric (SI) Dimensions:
mass

Notes:
(1) Used for gemstone measurements
(2) The metric (SI) equivalents above are exact.

Name:
pound-mass
(convert pound-mass to new units)

Abbreviation:
lbm

Other Names:
lb, lb-avdp, pound, pound-avoirdupois

Belongs to:
pound-mass Group

Metric (SI) Equivalent:
0.45359237 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
7000 grains-mass

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
pound-mass-troy
(convert pound-mass-troy to new units)

Abbreviation:
lbm-troy

Other Names:
lb-troy, lb-ap, pound-troy, pound-apothecaries

Belongs to:
pound-mass Group

Metric (SI) Equivalent:
0.3732417216 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
5760 grains-mass

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
proton-mass
(convert proton-mass to new units)

Abbreviation:
m-p

Metric (SI) Equivalent:
1.67262171e-27 kilograms

Standard Uncertainty:
2.9e-34 kilograms

Metric (SI) Dimensions:
mass

Note:
The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:
quarter-mass
(convert quarter-mass to new units)

Abbreviation:
qrm

Other Names:
quarter, qr

Belongs to:
quarter Group

Metric (SI) Equivalent:
11.33980925 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
25 pounds-mass

Notes:
(1) This unit is used in the United States.
(2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
quarter-mass-long
(convert quarter-mass-long to new units)

Abbreviation:
qrm-lg

Other Names:
quarter-long, long-quarter

Belongs to:
quarter Group

Metric (SI) Equivalent:
254.0117272 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
560 pounds-mass

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
quarter-mass-short
(convert quarter-mass-short to new units)

Abbreviation:
qrm-sh

Other Names:
quarter-short, short-quarter

Belongs to:
quarter Group

Metric (SI) Equivalent:
226.796185 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
500 pounds-mass

Notes:
(1) This unit is used in the United States.
(2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
quarter-mass-UK
(convert quarter-mass-UK to new units)

Abbreviation:
qrm-UK

Other Names:
quarter-UK, qr-UK

Belongs to:
quarter Group

Metric (SI) Equivalent:
12.70058636 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
28 pounds-mass

Notes:
(1) The "UK" suffix indicates that this unit is used in the United Kingdom.
(2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
quintal
(convert quintal to new units)

Abbreviation:
q

Metric (SI) Equivalent:
100 kilograms

Metric (SI) Dimensions:
mass

Note:
The metric (SI) equivalent above is exact.

Name:
scruple-mass
(convert scruple-mass to new units)

Abbreviation:
s-ap

Other Names:
scruple, scr

Metric (SI) Equivalents:
1.2959782 grams
0.0012959782 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
20 grains-mass

Notes:
(1) Apothecaries unit
(2) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
slug
(convert slug to new units)

Other Names:
gee-pound, g-pound

Belongs to:
slug Group

Metric (SI) Equivalent:
14.593902937 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
pound-force / (foot / second^2)

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
stone
(convert stone to new units)

Abbreviation:
st

Metric (SI) Equivalent:
6.35029318 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
14 pounds-mass

Note:
The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:
tau-mass
(convert tau-mass to new units)

Abbreviation:
m-tau

Metric (SI) Equivalent:
3.16777e-27 kilograms

Standard Uncertainty:
5.2e-31 kilograms

Metric (SI) Dimensions:
mass

Note:
The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:
ton-assay
(convert ton-assay to new units)

Abbreviation:
AT

Other Names:
assay-ton, ton-short-assay, assay-ton-short

Belongs to:
ton-mass Group

Metric (SI) Equivalent:
0.029166666667 kilograms

Metric (SI) Dimensions:
mass

Note:
This unit is used in the United States.

Name:
ton-long-assay
(convert ton-long-assay to new units)

Abbreviation:
AT-lg

Other Names:
assay-ton-long, ton-UK-assay, assay-ton-UK

Belongs to:
ton-mass Group

Metric (SI) Equivalent:
0.032666666667 kilograms

Metric (SI) Dimensions:
mass

Note:
The "UK" suffix indicates that this unit is used in the United Kingdom.

Name:
ton-mass
(convert ton-mass to new units)

Abbreviation:
tonm

Other Names:
ton-CA, ton, ton-short, short-ton, ton-net, net-ton

Belongs to:
ton-mass Group

Metric (SI) Equivalents:
0.90718474 tons-mass-metric
907.18474 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
2000 pounds-mass

Notes:
(1) This unit is used in the United States.
(2) The "CA" suffix indicates that this unit is used in Canada.
(3) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
ton-mass-long
(convert ton-mass-long to new units)

Abbreviation:
tonm-lg

Other Names:
ton-UK, ton-long, long-ton, ton-gross, gross-ton

Belongs to:
ton-mass Group

Metric (SI) Equivalents:
1.0160469088 tons-mass-metric
1016.0469088 kilograms

Metric (SI) Dimensions:
mass

Description in Terms of
Other Units and Constants:
2240 pounds-mass

Notes:
(1) The "UK" suffix indicates that this unit is used in the United Kingdom.
(2) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:
ton-mass-metric
(convert ton-mass-metric to new units)

Abbreviation:
tonm-metric

Other Names:
t, tonne, ton-metric, metric-ton

Belongs to:
ton-mass Group

Metric (SI) Equivalent:
ton-mass-metric is a metric unit
1000 kilograms

Metric (SI) Dimensions:
mass

Note:
The metric (SI) equivalent above is exact.

Name:
unified-atomic-mass-unit
(convert unified-atomic-mass-unit to new units)

Abbreviation:
u

Other Names:
atomic-mass-unit, atomic-mass-constant, dalton, Da, m-u, amu

Metric (SI) Equivalent:
1.66053886e-27 kilograms

Standard Uncertainty:
2.8e-34 kilograms

Metric (SI) Dimensions:
mass

Note:
The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.


Name:	bag-cement (convert bag-cement to new units)
Metric (SI) Equivalent:	42.63768278 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	94 pounds-mass
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	barrel-cement (convert barrel-cement to new units)
Metric (SI) Equivalent:	170.55073112 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	376 pounds-mass
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	carat (convert carat to new units)
Abbreviation:	ct
Another Name:	metric-carat
Metric (SI) Equivalents:	0.2 grams 0.0002 kilograms
Metric (SI) Dimensions:	mass
Notes:	(1) Used for gemstone measurements (2) The metric (SI) equivalents above are exact.

Name:	dram-mass (convert dram-mass to new units)
Abbreviation:	drm
Other Names:	dr, dr-avdp, dram, dram-avoirdupois, drachm, drachm-avoirdupois
Belongs to:	dram-mass Group
Metric (SI) Equivalents:	1.7718451953 grams 0.0017718451953 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	pound-mass / 256
Note:	The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	dram-mass-troy (convert dram-mass-troy to new units)
Abbreviation:	drm-troy
Other Names:	dr-troy, dr-ap, dram-troy, dram-apothecaries, drachm-troy, drachm-apothecaries
Belongs to:	dram-mass Group
Metric (SI) Equivalents:	3.8879346 grams 0.0038879346 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	pound-mass-troy / 96
Note:	The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	electron-mass (convert electron-mass to new units)
Abbreviation:	m-e
Other Names:	natural-unit-of-mass, atomic-unit-of-mass
Metric (SI) Equivalent:	9.1093826e-31 kilograms
Standard Uncertainty:	1.6e-37 kilograms
Metric (SI) Dimensions:	mass
Note:	The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:	gamma-mass (convert gamma-mass to new units)
Another Name:	gamma
Metric (SI) Equivalents:	1 micro gram 1e-09 kilograms
Metric (SI) Dimensions:	mass
Note:	The metric (SI) equivalents above are exact.

Name:	grain-mass (convert grain-mass to new units)
Abbreviation:	grm
Metric (SI) Equivalents:	6.479891 centi grams 6.479891e-05 kilograms
Metric (SI) Dimensions:	mass
Notes:	(1) Apothecaries, avoirdupois, and troy unit (2) The metric (SI) equivalents above are exact.

Name:	gram (convert gram to new units)
Abbreviation:	g
Other Names:	gm, gramme
Metric (SI) Equivalent:	gram is a metric unit 0.001 kilograms
Metric (SI) Dimensions:	mass
Note:	The metric (SI) equivalent above is exact.

Name:	hundredweight (convert hundredweight to new units)
Abbreviation:	cwt
Other Names:	hundredweight-CA, cental, cental-CA, hundredweight-short, short-hundredweight, hundredweight-net, net-hundredweight
Belongs to:	hundredweight Group
Metric (SI) Equivalent:	45.359237 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	100 pounds-mass
Notes:	(1) This unit is used in the United States. (2) The "CA" suffix indicates that this unit is used in Canada. (3) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	hundredweight-long (convert hundredweight-long to new units)
Abbreviation:	cwt-lg
Other Names:	hundredweight-UK, long-hundredweight, hundredweight-gross, gross-hundredweight
Belongs to:	hundredweight Group
Metric (SI) Equivalent:	50.80234544 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	112 pounds-mass
Notes:	(1) The "UK" suffix indicates that this unit is used in the United Kingdom. (2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	kilogram (convert kilogram to new units)
Abbreviation:	kg
Another Name:	kilogramme
Metric (SI) Equivalent:	kilogram is a metric unit (in fact, it is a base SI unit)
Metric (SI) Dimensions:	mass

Name:	kip-mass (convert kip-mass to new units)
Other Names:	kip, kilopound
Metric (SI) Equivalents:	0.45359237 tons-mass-metric 453.59237 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	1000 pounds-mass
Note:	The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	metric-slug (convert metric-slug to new units)
Belongs to:	slug Group
Metric (SI) Equivalent:	9.80665 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	kilogram-force / (meter / second^2)
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	muon-mass (convert muon-mass to new units)
Abbreviation:	m-mu
Metric (SI) Equivalent:	1.8835314e-28 kilograms
Standard Uncertainty:	3.3e-35 kilograms
Metric (SI) Dimensions:	mass
Note:	The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:	neutron-mass (convert neutron-mass to new units)
Abbreviation:	m-n
Metric (SI) Equivalent:	1.67492728e-27 kilograms
Standard Uncertainty:	2.9e-34 kilograms
Metric (SI) Dimensions:	mass
Note:	The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:	ounce-mass (convert ounce-mass to new units)
Abbreviation:	ozm
Other Names:	oz, oz-avdp, ounce, ounce-avoirdupois
Belongs to:	ounce-mass Group
Metric (SI) Equivalents:	28.349523125 grams 0.028349523125 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	pound-mass / 16
Note:	The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	ounce-mass-troy (convert ounce-mass-troy to new units)
Abbreviation:	ozm-troy
Other Names:	oz-troy, oz-ap, ounce-troy, ounce-apothecaries
Belongs to:	ounce-mass Group
Metric (SI) Equivalents:	31.1034768 grams 0.0311034768 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	pound-mass-troy / 12
Note:	The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	pennyweight (convert pennyweight to new units)
Abbreviation:	dwt
Metric (SI) Equivalents:	1.55517384 grams 0.00155517384 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	24 grains-mass
Notes:	(1) Troy unit (2) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	Planck-mass (convert Planck-mass to new units)
Metric (SI) Equivalent:	2.17645e-08 kilograms
Standard Uncertainty:	1.6e-12 kilograms
Metric (SI) Dimensions:	mass
Note:	The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:	point-mass (convert point-mass to new units)
Another Name:	point
Metric (SI) Equivalents:	2 milli grams 2e-06 kilograms
Metric (SI) Dimensions:	mass
Notes:	(1) Used for gemstone measurements (2) The metric (SI) equivalents above are exact.

Name:	pound-mass (convert pound-mass to new units)
Abbreviation:	lbm
Other Names:	lb, lb-avdp, pound, pound-avoirdupois
Belongs to:	pound-mass Group
Metric (SI) Equivalent:	0.45359237 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	7000 grains-mass
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	pound-mass-troy (convert pound-mass-troy to new units)
Abbreviation:	lbm-troy
Other Names:	lb-troy, lb-ap, pound-troy, pound-apothecaries
Belongs to:	pound-mass Group
Metric (SI) Equivalent:	0.3732417216 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	5760 grains-mass
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	proton-mass (convert proton-mass to new units)
Abbreviation:	m-p
Metric (SI) Equivalent:	1.67262171e-27 kilograms
Standard Uncertainty:	2.9e-34 kilograms
Metric (SI) Dimensions:	mass
Note:	The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:	quarter-mass (convert quarter-mass to new units)
Abbreviation:	qrm
Other Names:	quarter, qr
Belongs to:	quarter Group
Metric (SI) Equivalent:	11.33980925 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	25 pounds-mass
Notes:	(1) This unit is used in the United States. (2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	quarter-mass-long (convert quarter-mass-long to new units)
Abbreviation:	qrm-lg
Other Names:	quarter-long, long-quarter
Belongs to:	quarter Group
Metric (SI) Equivalent:	254.0117272 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	560 pounds-mass
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	quarter-mass-short (convert quarter-mass-short to new units)
Abbreviation:	qrm-sh
Other Names:	quarter-short, short-quarter
Belongs to:	quarter Group
Metric (SI) Equivalent:	226.796185 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	500 pounds-mass
Notes:	(1) This unit is used in the United States. (2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	quarter-mass-UK (convert quarter-mass-UK to new units)
Abbreviation:	qrm-UK
Other Names:	quarter-UK, qr-UK
Belongs to:	quarter Group
Metric (SI) Equivalent:	12.70058636 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	28 pounds-mass
Notes:	(1) The "UK" suffix indicates that this unit is used in the United Kingdom. (2) The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	quintal (convert quintal to new units)
Abbreviation:	q
Metric (SI) Equivalent:	100 kilograms
Metric (SI) Dimensions:	mass
Note:	The metric (SI) equivalent above is exact.

Name:	scruple-mass (convert scruple-mass to new units)
Abbreviation:	s-ap
Other Names:	scruple, scr
Metric (SI) Equivalents:	1.2959782 grams 0.0012959782 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	20 grains-mass
Notes:	(1) Apothecaries unit (2) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	slug (convert slug to new units)
Other Names:	gee-pound, g-pound
Belongs to:	slug Group
Metric (SI) Equivalent:	14.593902937 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	pound-force / (foot / second^2)
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	stone (convert stone to new units)
Abbreviation:	st
Metric (SI) Equivalent:	6.35029318 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	14 pounds-mass
Note:	The metric (SI) equivalent above was calculated from exact values using double-precision arithmetic.

Name:	tau-mass (convert tau-mass to new units)
Abbreviation:	m-tau
Metric (SI) Equivalent:	3.16777e-27 kilograms
Standard Uncertainty:	5.2e-31 kilograms
Metric (SI) Dimensions:	mass
Note:	The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Name:	ton-assay (convert ton-assay to new units)
Abbreviation:	AT
Other Names:	assay-ton, ton-short-assay, assay-ton-short
Belongs to:	ton-mass Group
Metric (SI) Equivalent:	0.029166666667 kilograms
Metric (SI) Dimensions:	mass
Note:	This unit is used in the United States.

Name:	ton-long-assay (convert ton-long-assay to new units)
Abbreviation:	AT-lg
Other Names:	assay-ton-long, ton-UK-assay, assay-ton-UK
Belongs to:	ton-mass Group
Metric (SI) Equivalent:	0.032666666667 kilograms
Metric (SI) Dimensions:	mass
Note:	The "UK" suffix indicates that this unit is used in the United Kingdom.

Name:	ton-mass (convert ton-mass to new units)
Abbreviation:	tonm
Other Names:	ton-CA, ton, ton-short, short-ton, ton-net, net-ton
Belongs to:	ton-mass Group
Metric (SI) Equivalents:	0.90718474 tons-mass-metric 907.18474 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	2000 pounds-mass
Notes:	(1) This unit is used in the United States. (2) The "CA" suffix indicates that this unit is used in Canada. (3) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	ton-mass-long (convert ton-mass-long to new units)
Abbreviation:	tonm-lg
Other Names:	ton-UK, ton-long, long-ton, ton-gross, gross-ton
Belongs to:	ton-mass Group
Metric (SI) Equivalents:	1.0160469088 tons-mass-metric 1016.0469088 kilograms
Metric (SI) Dimensions:	mass
Description in Terms of Other Units and Constants:	2240 pounds-mass
Notes:	(1) The "UK" suffix indicates that this unit is used in the United Kingdom. (2) The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.

Name:	ton-mass-metric (convert ton-mass-metric to new units)
Abbreviation:	tonm-metric
Other Names:	t, tonne, ton-metric, metric-ton
Belongs to:	ton-mass Group
Metric (SI) Equivalent:	ton-mass-metric is a metric unit 1000 kilograms
Metric (SI) Dimensions:	mass
Note:	The metric (SI) equivalent above is exact.

Name:	unified-atomic-mass-unit (convert unified-atomic-mass-unit to new units)
Abbreviation:	u
Other Names:	atomic-mass-unit, atomic-mass-constant, dalton, Da, m-u, amu
Metric (SI) Equivalent:	1.66053886e-27 kilograms
Standard Uncertainty:	2.8e-34 kilograms
Metric (SI) Dimensions:	mass
Note:	The value for this measured constant was obtained from NIST. See their section on constants, units, and uncertainty for more information.

Library of Units and Constants:	Name Index	Quantity Index	Group Index