Square Centimeter to Square Kilometer Converter

Area Converter

20 units available

Decimals:

From

To

1.000000e-10

1 cm² = 1.000000e-10 km²

Formula:

km² = cm² × 1.000000e-10

With your value: 1 cm² = 1.000000e-10 km²

How big is that?

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

Your value1.00 cm²

Postage stamp (6.0× your value)6.00 cm²

A4 sheet (6.3e+2× your value)625 cm²

Parking space (1.3e+5× your value)1.25e+5 cm²

Tennis court (2.6e+6× your value)2.61e+6 cm²

Football pitch (7.1e+7× your value)7.14e+7 cm²

Other Square Centimeter to Square Kilometer conversions

2 cm² to km² 3 cm² to km² 4 cm² to km² 5 cm² to km² 6 cm² to km² 7 cm² to km² 8 cm² to km²

Square Centimeter to Square Kilometer Conversion Table

Square Centimeter (cm²)	Square Kilometer (km²)
0.5	5.000000e-11
1	1.000000e-10
2	2.000000e-10
5	5.000000e-10
10	1.000000e-9
15	1.500000e-9
20	2.000000e-9
25	2.500000e-9
50	5.000000e-9
100	1.000000e-8
250	2.500000e-8
500	5.000000e-8
1000	1.000000e-7

Square Kilometer to Square Centimeter Conversion Table

Square Kilometer (km²)	Square Centimeter (cm²)
0.5	5,000,000,000
1	10,000,000,000
2	20,000,000,000
5	50,000,000,000
10	100,000,000,000
15	150,000,000,000
20	200,000,000,000
25	250,000,000,000
50	500,000,000,000
100	1.000000e+12
250	2.500000e+12
500	5.000000e+12
1000	1.000000e+13

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 Centimeter (cm²)

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

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

How to Convert Square Centimeter to Square Kilometer

To convert from Square Centimeter (cm²) to Square Kilometer (km²), multiply the value by 1.000000e-10.

Formula: km² = cm² × 1.000000e-10

Reverse: cm² = km² × 1.000000e+10

Step-by-Step Example

Start with your value in Square Centimeter. For example: 5 cm²
Multiply by the conversion factor: 5 x 1.000000e-10
The result is: 5.000000e-10 km²

About Square Centimeter

The square centimeter (cm²) is a unit of area. One square centimeter equals 0.0001 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 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.

Frequently Asked Questions

How many Square Kilometer are in 1 Square Centimeter?

There are exactly 1.000000e-10 Square Kilometer in 1 Square Centimeter. This means the conversion factor from Square Centimeter to Square Kilometer is 1.000000e-10.

What is the formula to convert Square Centimeter to Square Kilometer?

The formula to convert Square Centimeter to Square Kilometer is: km² = cm² × 1.000000e-10. For example, to convert 10 Square Centimeter to Square Kilometer, you would multiply 10 by 1.000000e-10.

What is a Square Centimeter?