Square Kilometer to Barn Converter

Area Converter

20 units available

Decimals:

From

To

1.000000e+34

1 km² = 1.000000e+34 b

Formula:

b = km² × 1.000000e+34

With your value: 1 km² = 1.000000e+34 b

How big is that?

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

Parking space (1/8.0e+4 your value)0.0000125 km²

Tennis court (1/3.8e+3 your value)0.000261 km²

Football pitch (1/1.4e+2 your value)0.00714 km²

Hectare (1/1.0e+2 your value)0.0100 km²

Your value1.00 km²

Central Park (3.4× your value)3.41 km²

Other Square Kilometer to Barn conversions

2 km² to b 3 km² to b 4 km² to b 5 km² to b 6 km² to b 7 km² to b 8 km² to b

Square Kilometer to Barn Conversion Table

Square Kilometer (km²)	Barn (b)
0.5	5.000000e+33
1	1.000000e+34
2	2.000000e+34
5	5.000000e+34
10	1.000000e+35
15	1.500000e+35
20	2.000000e+35
25	2.500000e+35
50	5.000000e+35
100	1.000000e+36
250	2.500000e+36
500	5.000000e+36
1000	1.000000e+37

Barn to Square Kilometer Conversion Table

Barn (b)	Square Kilometer (km²)
0.5	5.000000e-35
1	1.000000e-34
2	2.000000e-34
5	5.000000e-34
10	1.000000e-33
15	1.500000e-33
20	2.000000e-33
25	2.500000e-33
50	5.000000e-33
100	1.000000e-32
250	2.500000e-32
500	5.000000e-32
1000	1.000000e-31

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.

Square Kilometer (km²)

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 Square Kilometer to Barn

To convert from Square Kilometer (km²) to Barn (b), multiply the value by 1.000000e+34.

Formula: b = km² × 1.000000e+34

Reverse: km² = b × 1.000000e-34

Step-by-Step Example

Start with your value in Square Kilometer. For example: 5 km²
Multiply by the conversion factor: 5 x 1.000000e+34
The result is: 5.000000e+34 b

About Square Kilometer

The square kilometer (km²) is a unit of area. One square kilometer equals 1.000000 × 10^+6 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 Square Kilometer?

There are exactly 1.000000e+34 Barn in 1 Square Kilometer. This means the conversion factor from Square Kilometer to Barn is 1.000000e+34.

What is the formula to convert Square Kilometer to Barn?

The formula to convert Square Kilometer to Barn is: b = km² × 1.000000e+34. For example, to convert 10 Square Kilometer to Barn, you would multiply 10 by 1.000000e+34.

What is a Square Kilometer?