Kilometres to micrometres converter
Micrometres (µm)
1 kilometre = 1,000,000,000 micrometres
How to convert kilometres to micrometres
µm = km × 1000000000
Multiply the number of kilometres by 1000000000 to get micrometres. Going the other way, divide by 1000000000 (or multiply by 1 × 10^-9).
One kilometre is exactly defined as 1000000000 micrometres (to 12 significant figures), and one micrometre is 1 × 10^-9 kilometres.
Worked examples
- Convert 5 kilometres: 5 × 1000000000 = 5,000,000,000 5,000,000,000 micrometres.
- Convert 12.5 kilometres: 12.5 × 1000000000 = 12,500,000,000 12,500,000,000 micrometres.
- Convert 250 kilometres: 250 × 1000000000 = 250,000,000,000 250,000,000,000 micrometres.
Quick-reference table
| km | µm |
|---|---|
| 1 | 1,000,000,000 |
| 2 | 2,000,000,000 |
| 3 | 3,000,000,000 |
| 5 | 5,000,000,000 |
| 10 | 10,000,000,000 |
| 15 | 15,000,000,000 |
| 20 | 20,000,000,000 |
| 25 | 25,000,000,000 |
| 50 | 50,000,000,000 |
| 75 | 75,000,000,000 |
| 100 | 100,000,000,000 |
| 1,000 | 1,000,000,000,000 |
| µm | km |
|---|---|
| 1 | 1e-9 |
| 2 | 2e-9 |
| 3 | 3e-9 |
| 5 | 5e-9 |
| 10 | 1e-8 |
| 15 | 1.5e-8 |
| 20 | 2e-8 |
| 25 | 2.5e-8 |
| 50 | 5e-8 |
| 75 | 7.5e-8 |
| 100 | 1e-7 |
| 1,000 | 0.000001 |
Related conversions
Frequently asked questions
How many micrometres are in 1 kilometre?
1 kilometre equals 1,000,000,000 micrometres.
What is the formula to convert kilometres to micrometres?
Use µm = km × 1000000000. Multiply the number of kilometres by 1000000000 to get micrometres. Going the other way, divide by 1000000000 (or multiply by 1 × 10^-9).
What is 100 kilometres in micrometres?
100 kilometres is 100,000,000,000 micrometres.