Square Centimeter to Square Kilometer Converter
Area · unit-converter
Convert Square Centimeter to Square Kilometer with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use square-meter-based definitions (international feet / yard standards, acre, hectare, and regional units like pyeong/tsubo).
Calculator
From: Square Centimeter (cm2)
To: Square Kilometer (km2)
About Square Centimeter
The square centimeter is one ten-thousandth of a square meter. Small objects, paper sizes, and biology use square centimeters.
About Square Kilometer
The square kilometer is a metric unit equal to one million square meters. It is standard for city sizes, large properties, and regional planning in metric countries.
How to convert square centimeters to square kilometers
1 square centimeter is equal to 1.00000000e-10 square kilometer:
1 cm2 = (0.0001 m² ÷ 1000000 m²) km2 = 1.00000000e-10 km2
Each square centimeter is defined as 0.0001 m² and each square kilometer as 1000000 m², so one cm2 equals 0.0001 ÷ 1000000 km2 = 1.00000000e-10 km2.
Let a(cm2) be the numeric value of the same area measured in Square Centimeter (cm2), and a(km2) the value in Square Kilometer (km2). Then:
a(km2) = a(cm2) × (0.0001 / 1000000)
Equivalently, divide by how many cm2 fit into one km2 (m² per km2 divided by m² per cm2):
a(km2) = a(cm2) ÷ 1.00000000e+10
Or: square kilometer = square centimeter ÷ 1.00000000e+10
Examples
Example #1: Convert 20 cm2 to square kilometer
20 cm2 = 20 cm2 × (0.0001/1000000) km2 = 0.000000002 km2
20 cm2 = 20 cm2 ÷ 1.00000000e+10 = 0.000000002 km2
Example #2: Convert 50 cm2 to square kilometer
50 cm2 = 50 cm2 × (0.0001/1000000) km2 = 0.000000005 km2
50 cm2 = 50 cm2 ÷ 1.00000000e+10 = 0.000000005 km2
Summary
To convert Square Centimeter to Square Kilometer, multiply the value in cm2 by the ratio of square meters per cm2 divided by square meters per km2. Equivalently: value_km2 = value_cm2 × (0.0001 / 1000000). Numerically, 1 cm2 equals 1e-10 km2.
Relationship context
Both units are metric (SI) and tied to the square meter. Conversions use exact ratios from their m² definitions. The factor from Square Centimeter to Square Kilometer is 1.000000e-10 (1 cm2 = 1e-10 km2).
Conversion tables
| Square Centimeter (cm2) | Square Kilometer (km2) |
|---|---|
| 0.1 | 0 |
| 1 | 0.0000000001 |
| 2 | 0.0000000002 |
| 3 | 0.0000000003 |
| 4 | 0.0000000004 |
| 5 | 0.0000000005 |
| 6 | 0.0000000006 |
| 7 | 0.0000000007 |
| 8 | 0.0000000008 |
| 9 | 0.0000000009 |
| Square Centimeter (cm2) | Square Kilometer (km2) |
|---|---|
| 10 | 0.000000001 |
| 20 | 0.000000002 |
| 30 | 0.000000003 |
| 40 | 0.000000004 |
| 50 | 0.000000005 |
| 60 | 0.000000006 |
| 70 | 0.000000007 |
| 80 | 0.000000008 |
| 90 | 0.000000009 |
| 100 | 0.00000001 |