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Area

Characteristic

acre

Notes

Symbol

ac

Other Name

international-acre

Metric (SI) Equivalent

0.40468564224 hectares

This equivalent and the one below are calculated from exact values.

Another Metric (SI) Equivalent with More Basic Units

4046.8564224 meters2

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

4840 yards2

Unit Group

acre Group

Characteristic

acre-US-survey

( Used in the United States for some survey measurements )

Notes

Other Names

ac-US-survey, survey-acre

Metric (SI) Equivalent

0.40468726099 hectares

This equivalent and the one below are calculated from exact values.

Another Metric (SI) Equivalent with More Basic Units

4046.8726099 meters2

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

4840 yards-US-survey2

Unit Group

acre Group

Characteristic

are

Notes

Symbol

a

Metric (SI) Equivalent

100 meters2

This equivalent is exact.

Metric (SI) Dimensions

length2

Characteristic

arpent-area

( Quebec survey unit )

Notes

Metric (SI) Equivalent

0.34188938592 hectares

This equivalent and the one below are calculated from exact values.

Another Metric (SI) Equivalent with More Basic Units

3418.8938592 meters2

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

arpent-length2

Characteristic

barn

Notes

Symbol

b

Metric (SI) Equivalent

100 femtometers2

This equivalent is exact.

Metric (SI) Dimensions

length2

Characteristic

centare

Notes

Symbol

ca

Other Name

centiare

Metric (SI) Equivalent

1 meter2

This equivalent is exact.

Metric (SI) Dimensions

length2

Characteristic

circular-inch

Notes

Symbol

cin

Other Name

cir-in

Metric (SI) Equivalent

5.067074791 centimeters2

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

pi * (inch / 2)2

Characteristic

circular-mil

Notes

Symbol

cmil

Other Name

cir-mil

Metric (SI) Equivalent

506.7074791 micrometers2

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

pi * (mil-length / 2)2

Characteristic

hectare

Notes

Symbol

ha

Other Name

hectoare

Metric (SI) Equivalent

hectare is a metric unit

Another Metric (SI) Equivalent with More Basic Units

10000 meters2

This equivalent is exact.

Metric (SI) Dimensions

length2

Characteristic

rood

Notes

Metric (SI) Equivalent

0.10117141056 hectares

This equivalent and the one below are calculated from exact values.

Another Metric (SI) Equivalent with More Basic Units

1011.7141056 meters2

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

40 rods2

Characteristic

section

Notes

Metric (SI) Equivalent

2.5899984703 kilometers2

This equivalent is calculated from exact values.

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

mile-US-survey2

Characteristic

shed

Notes

Metric (SI) Equivalent

1×10-52 meters2

This equivalent is exact.

Metric (SI) Dimensions

length2

Characteristic

Thomson-cross-section

Notes

Symbol

σe

Use "sigma-e" for our conversion calculators.

Metric (SI) Equivalent

6.652458734×10-29 meters2

Standard Uncertainty

± 1.3×10-37 meters2

Metric (SI) Dimensions

length2

Characteristic

township

( Used in the United States )

Notes

Metric (SI) Equivalent

93.239944932 kilometers2

This equivalent is calculated from exact values.

Metric (SI) Dimensions

length2

Description in Terms of Other Units and Constants

(6 miles-US-survey)2