Kilometres to nanometres converter
Nanometres (nm)
1 kilometre = 1,000,000,000,000 nanometres
How to convert kilometres to nanometres
nm = km × 1000000000000
Multiply the number of kilometres by 1000000000000 to get nanometres. Going the other way, divide by 1000000000000 (or multiply by 1 × 10^-12).
One kilometre is exactly defined as 1000000000000 nanometres (to 12 significant figures), and one nanometre is 1 × 10^-12 kilometres.
Worked examples
- Convert 5 kilometres: 5 × 1000000000000 = 5,000,000,000,000 5,000,000,000,000 nanometres.
- Convert 12.5 kilometres: 12.5 × 1000000000000 = 12,500,000,000,000 12,500,000,000,000 nanometres.
- Convert 250 kilometres: 250 × 1000000000000 = 250,000,000,000,000 250,000,000,000,000 nanometres.
Quick-reference table
| km | nm |
|---|---|
| 1 | 1,000,000,000,000 |
| 2 | 2,000,000,000,000 |
| 3 | 3,000,000,000,000 |
| 5 | 5,000,000,000,000 |
| 10 | 10,000,000,000,000 |
| 15 | 15,000,000,000,000 |
| 20 | 20,000,000,000,000 |
| 25 | 25,000,000,000,000 |
| 50 | 50,000,000,000,000 |
| 75 | 75,000,000,000,000 |
| 100 | 100,000,000,000,000 |
| 1,000 | 1e+15 |
| nm | km |
|---|---|
| 1 | 1e-12 |
| 2 | 2e-12 |
| 3 | 3e-12 |
| 5 | 5e-12 |
| 10 | 1e-11 |
| 15 | 1.5e-11 |
| 20 | 2e-11 |
| 25 | 2.5e-11 |
| 50 | 5e-11 |
| 75 | 7.5e-11 |
| 100 | 1e-10 |
| 1,000 | 1e-9 |
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Frequently asked questions
How many nanometres are in 1 kilometre?
1 kilometre equals 1,000,000,000,000 nanometres.
What is the formula to convert kilometres to nanometres?
Use nm = km × 1000000000000. Multiply the number of kilometres by 1000000000000 to get nanometres. Going the other way, divide by 1000000000000 (or multiply by 1 × 10^-12).
What is 100 kilometres in nanometres?
100 kilometres is 100,000,000,000,000 nanometres.