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Time

Characteristic

atomic-unit-of-time

Notes

Metric (SI) Equivalent

2.4188843265×10-17 seconds

Standard Uncertainty

± 1.2×10-28 seconds

Metric (SI) Dimensions

time

Characteristic

day

Notes

Symbol

d

Metric (SI) Equivalent

86.4 kiloseconds

This equivalent is calculated from exact values.

Metric (SI) Dimensions

time

Description in Terms of Other Units and Constants

24 hours

Characteristic

hour

Notes

Symbol

h

Other Name

hr

Metric (SI) Equivalent

hour is a metric unit

Another Metric (SI) Equivalent with More Basic Units

3.6 kiloseconds

This equivalent is calculated from exact values.

Metric (SI) Dimensions

time

Description in Terms of Other Units and Constants

60 minutes

Characteristic

minute

Notes

Symbol

min

Other Name

mn

Metric (SI) Equivalent

minute is a metric unit

Another Metric (SI) Equivalent with More Basic Units

60 seconds

This equivalent is calculated from exact values.

Metric (SI) Dimensions

time

Description in Terms of Other Units and Constants

60 seconds

Characteristic

natural-unit-of-time

Notes

Metric (SI) Equivalent

1.2880886683×10-21 seconds

Standard Uncertainty

± 8.3×10-31 seconds

Metric (SI) Dimensions

time

Characteristic

Planck-time

Notes

Symbol

tP

Use "t-P" for our conversion calculators.

Metric (SI) Equivalent

5.39106×10-44 seconds

Standard Uncertainty

± 3.2×10-48 seconds

Metric (SI) Dimensions

time

Characteristic

second

Notes

Symbol

s

Other Names

sec, seconde

Metric (SI) Equivalent

second is a metric unit (in fact, it is a base SI unit)

Metric (SI) Dimensions

time

Characteristic

shake

Notes

Metric (SI) Equivalent

10 nanoseconds

This equivalent is exact.

Metric (SI) Dimensions

time

Characteristic

svedberg

Notes

Metric (SI) Equivalent

100 femtoseconds

This equivalent is exact.

Metric (SI) Dimensions

time

Characteristic

week

Notes

Metric (SI) Equivalent

604.8 kiloseconds

This equivalent is calculated from exact values.

Metric (SI) Dimensions

time

Description in Terms of Other Units and Constants

7 days

Characteristic

year

Notes

Symbol

y

Other Names

yr, a

Metric (SI) Equivalent

31.5576 megaseconds

This equivalent is calculated from exact values.

Metric (SI) Dimensions

time

Description in Terms of Other Units and Constants

365.25 days