Speed converter
Convert km/h, mph, m/s, knots and Mach, the everyday and technical measures of how fast something moves.
Converter
Quick pairs
tap to loadOne kilometer per hour in every speed unit
16 rows| Unit | Symbol | 1 km/h equals |
|---|---|---|
| Meter per second | m/s | 0.2777777778 |
| Mile per hour | mph | 0.6213711922 |
| Foot per second | ft/s | 0.9113444153 |
| Knot | kn | 0.5399568035 |
| Centimeter per second | cm/s | 27.77777778 |
| Millimeter per second | mm/s | 277.7777778 |
| Kilometer per second | km/s | 0.0002777777778 |
| Kilometer per minute | km/min | 0.01666666667 |
| Meter per minute | m/min | 16.66666667 |
| Mile per second | mi/s | 0.000172603109 |
| Mile per minute | mi/min | 0.01035618654 |
| Inch per second | in/s | 10.93613298 |
| Yard per second | yd/s | 0.3037814718 |
| Mach (at sea level) | Ma | 0.0008162972105 |
| Speed of light | c | 9.265669e-10 |
| Foot per minute | ft/min | 54.68066492 |
How the kilometer per hour to mile per hour conversion works
Multiply by 0.6213711922 to go from kilometer per hour to mile per hour:
mph = km/h × 0.6213711922
Going the other way, multiply by 1.609344, which is the same as dividing by 0.6213711922.
Questions
How many mile per hour are in one kilometer per hour?
One kilometer per hour equals 0.6213711922 mile per hour.
Which units does this speed converter cover?
17 units in total, all referenced to the meter per second. They include meter per second, kilometer per hour, mile per hour, foot per second, knot, centimeter per second and more. Pick any pair from the two dropdown lists.
How precise are the results?
Every conversion is computed in your browser at double precision from the factors listed on this page, which follow the SI definitions and the exact international agreements for imperial and US customary units. Use the Decimals control to round the display without changing the underlying value.
Does anything I type leave my device?
No. The converter is plain JavaScript running locally, with no server round-trip, and the page keeps working offline once loaded.