Are to Barn Converter

Area Converter

20 units available

Decimals:

From

To

1.000000e+30

1 a = 1.000000e+30 b

Formula:

b = a × 1.000000e+30

With your value: 1 a = 1.000000e+30 b

How big is that?

Everyday references on a logarithmic scale, all expressed in are so you can sanity-check the result.

A4 sheet (1/1.6e+3 your value)0.000625 a

Parking space (1/8.0 your value)0.125 a

Your value1.00 a

Tennis court (2.6× your value)2.61 a

Football pitch (71× your value)71.4 a

Hectare (1.0e+2× your value)100 a

Other Are to Barn conversions

2 a to b 3 a to b 4 a to b 5 a to b 6 a to b 7 a to b 8 a to b

Are to Barn Conversion Table

Are (a)	Barn (b)
0.5	5.000000e+29
1	1.000000e+30
2	2.000000e+30
5	5.000000e+30
10	1.000000e+31
15	1.500000e+31
20	2.000000e+31
25	2.500000e+31
50	5.000000e+31
100	1.000000e+32
250	2.500000e+32
500	5.000000e+32
1000	1.000000e+33

Barn to Are Conversion Table

Barn (b)	Are (a)
0.5	5.000000e-31
1	1.000000e-30
2	2.000000e-30
5	5.000000e-30
10	1.000000e-29
15	1.500000e-29
20	2.000000e-29
25	2.500000e-29
50	5.000000e-29
100	1.000000e-28
250	2.500000e-28
500	5.000000e-28
1000	1.000000e-27

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Are (a)

Area

Exact conversion

Derived from the square metre via the length definitions above.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Barn (b)

Area

Exact conversion

Derived from the square metre via the length definitions above.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Are to Barn

To convert from Are (a) to Barn (b), multiply the value by 1.000000e+30.

Formula: b = a × 1.000000e+30

Reverse: a = b × 1.000000e-30

Step-by-Step Example

Start with your value in Are. For example: 5 a
Multiply by the conversion factor: 5 x 1.000000e+30
The result is: 5.000000e+30 b

About Are

The are (a) is a unit of area. One are equals 100 square metres. UnitConvertLab converts it against every other area unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: area calculations, engineering and science, education.

About Barn

The barn (b) is a unit of area. One barn equals 1.000000 × 10^-28 square metres. UnitConvertLab converts it against every other area unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: area calculations, engineering and science, education.

Frequently Asked Questions

How many Barn are in 1 Are?

There are exactly 1.000000e+30 Barn in 1 Are. This means the conversion factor from Are to Barn is 1.000000e+30.

What is the formula to convert Are to Barn?

The formula to convert Are to Barn is: b = a × 1.000000e+30. For example, to convert 10 Are to Barn, you would multiply 10 by 1.000000e+30.

What is a Are?