820 cm2 ≈ 8.2 × 10^-8 km2. To convert square centimeters to square kilometers, divide by 10,000,000,000: 820 ÷ 10,000,000,000 = 8.2 × 10^-8.
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: 820 × 1 × 10^-10 = 8.2 × 10^-8.
- Answer: 820 cm2 ≈ 8.2 × 10^-8 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) |
|---|---|
| 815 cm2 | 8.15 × 10^-8 km2 |
| 816 cm2 | 8.16 × 10^-8 km2 |
| 817 cm2 | 8.17 × 10^-8 km2 |
| 818 cm2 | 8.18 × 10^-8 km2 |
| 819 cm2 | 8.19 × 10^-8 km2 |
| 820 cm2 | 8.2 × 10^-8 km2 |
| 821 cm2 | 8.21 × 10^-8 km2 |
| 822 cm2 | 8.22 × 10^-8 km2 |
| 823 cm2 | 8.23 × 10^-8 km2 |
| 824 cm2 | 8.24 × 10^-8 km2 |
| 825 cm2 | 8.25 × 10^-8 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 |