Miles per Hour to Kilometers per Second Converter
Convert miles per hour (mph) to kilometers per second (km/s), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a speed, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 mph = 0.00044704 km/s
- 1 × 0.00044704 = 0.00044704 km/s
How to convert miles per hour to kilometers per second
1 mph = 0.00044704 km/s, so multiply by 0.00044704 to go from miles per hour to kilometers per second. Going the other way, 1 km/s = 2,236.93629205 mph.
km/s = mph × 0.00044704 mph = km/s × 2,236.93629205
Worked example:
1 mph = 0.00044704 km/s 5 × 0.00044704 = 0.0022352 km/s
Miles per Hour to kilometers per second table
| Miles per Hour | Kilometers per Second |
|---|---|
| 1 mph | 0.00044704 km/s |
| 2 mph | 0.00089408 km/s |
| 3 mph | 0.00134112 km/s |
| 4 mph | 0.00178816 km/s |
| 5 mph | 0.0022352 km/s |
| 6 mph | 0.00268224 km/s |
| 7 mph | 0.00312928 km/s |
| 8 mph | 0.00357632 km/s |
| 9 mph | 0.00402336 km/s |
| 10 mph | 0.0044704 km/s |
| 15 mph | 0.0067056 km/s |
| 20 mph | 0.0089408 km/s |
| 25 mph | 0.011176 km/s |
| 30 mph | 0.0134112 km/s |
| 40 mph | 0.0178816 km/s |
| 50 mph | 0.022352 km/s |
| 75 mph | 0.033528 km/s |
| 100 mph | 0.044704 km/s |
| 250 mph | 0.11176 km/s |
| 500 mph | 0.22352 km/s |
| 1000 mph | 0.44704 km/s |
About the units
- Miles per Hour (mph)
- Miles per hour, a US customary unit. Definition: NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement.
- Kilometers per Second (km/s)
- Kilometers per second, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).