Table Of Contents
Square kilometers to square nanometer Conversion
1 square kilometers (km²) is equal to 1000000000000000000000000 square nanometer (nm²).
1 km² = 1000000000000000000000000 nm²
or
1 nm² = 0.000000000000000000000001 km²
Formula
To convert a area from square kilometers (km²) to square nanometer (nm²), multiply the area in square kilometers by 1000000000000000000000000
a(nm²) = a(km²) × 1000000000000000000000000
Examples:
Convert 100 square kilometers to square nanometer:
a(nm²) = 100km² × 1000000000000000000000000 = 100000000000000000000000000 nm²
Conversion table
| Square kilometers (km²) | Square nanometer (nm²) |
|---|---|
| 1 km² | 1e24 nm² |
| 2 km² | 2e24 nm² |
| 3 km² | 3e24 nm² |
| 5 km² | 5e24 nm² |
| 10 km² | 1e25 nm² |
| 20 km² | 2e25 nm² |
| 25 km² | 2.5e25 nm² |
| 50 km² | 5e25 nm² |
| 100 km² | 1e26 nm² |
| 250 km² | 2.5e26 nm² |
| 500 km² | 5e26 nm² |
| 1000 km² | 1e27 nm² |
| Square nanometer (nm²) | Square kilometers (km²) |
|---|---|
| 1 nm² | 0 km² |
| 2 nm² | 0 km² |
| 3 nm² | 0 km² |
| 5 nm² | 0 km² |
| 10 nm² | 0 km² |
| 20 nm² | 0 km² |
| 25 nm² | 0 km² |
| 50 nm² | 0 km² |
| 100 nm² | 0 km² |
| 250 nm² | 0 km² |
| 500 nm² | 0 km² |
| 1000 nm² | 0 km² |
Frequently asked questions
How do I convert square kilometers to square nanometer?
Multiply the value in square kilometers by 1000000000000000000000000 to get the result in square nanometer. For example, 5 km² × 1000000000000000000000000 = 5e24 nm².
How many square nanometer are in 1 square kilometers?
1 square kilometers (km²) is equal to 1e24 square nanometer (nm²).
How do I convert square nanometer back to square kilometers?
Use the inverse operation: divide the value in square nanometer by 1000000000000000000000000 to get the result in square kilometers.
How accurate is the square kilometers to square nanometer conversion?
The converter multiplies by the conversion factor 1000000000000000000000000 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- NIST Handbook 44, Appendix C — General Tables of Units of Measurement (current edition)
- U.S. Survey Foot: Revised Unit Conversion Factors
- NIST Guide to the SI (SP 811), Appendix B.9: Factors for units listed by kind of quantity or field of science
