20.2 cm2 ≈ 2.02 × 10^-9 km2. To convert square centimeters to square kilometers, divide by 10,000,000,000: 20.2 ÷ 10,000,000,000 = 2.02 × 10^-9.
How to convert square centimeters to square kilometers
km2 = cm2 × 1 × 10^-10
- 1 cm2 = 1 × 10^-10 km2 (and 1 km2 = 10,000,000,000 cm2).
- Multiply the amount by the factor: 20.2 × 1 × 10^-10 = 2.02 × 10^-9.
- Answer: 20.2 cm2 ≈ 2.02 × 10^-9 km2 (rounded to 6 significant figures).
Shortcut: dividing by 10,000,000,000 gives the same result as multiplying by 1 × 10^-10.
Square Centimeters to Square Kilometers table
| Square Centimeters (cm2) | Square Kilometers (km2) |
|---|---|
| 19.7 cm2 | 1.97 × 10^-9 km2 |
| 19.8 cm2 | 1.98 × 10^-9 km2 |
| 19.9 cm2 | 1.99 × 10^-9 km2 |
| 20 cm2 | 2 × 10^-9 km2 |
| 20.1 cm2 | 2.01 × 10^-9 km2 |
| 20.2 cm2 | 2.02 × 10^-9 km2 |
| 20.3 cm2 | 2.03 × 10^-9 km2 |
| 20.4 cm2 | 2.04 × 10^-9 km2 |
| 20.5 cm2 | 2.05 × 10^-9 km2 |
| 20.6 cm2 | 2.06 × 10^-9 km2 |
| 20.7 cm2 | 2.07 × 10^-9 km2 |
| cm2 | km2 |
|---|---|
| 1 cm2 | 1 × 10^-10 km2 |
| 5 cm2 | 5 × 10^-10 km2 |
| 10 cm2 | 1 × 10^-9 km2 |
| 50 cm2 | 5 × 10^-9 km2 |
| 100 cm2 | 1 × 10^-8 km2 |
| 1,000 cm2 | 1 × 10^-7 km2 |