Speed input
Unit converter
Speed Converter
Convert mph, km/h, m/s, ft/s, knots, Mach, and running pace instantly. Useful for driving, cycling, running, aviation, shipping, physics, and weather reports.
All results
Speed conversion results
Miles per hour60mph
Kilometers per hour96.5606km/h
Meters per second26.8224m/s
Feet per second88ft/s
Knots52.1386kn
Mach0.0782Mach
Centimeters per second2,682.24cm/s
Pace per kilometer0:37min/km
Pace per mile1:00min/mi
Speed conversion formulas
km/h = mph x 1.609344Road speed conversion between US and metric signs.
m/s = km/h / 3.6Physics and engineering speed conversion.
knots = km/h / 1.852Marine and aviation speed conversion.
Mach = m/s / 343Approximate Mach number at sea level and 20 C.
Speed conversion reference table
| Unit | Equals | Typical use |
|---|---|---|
| 1 mph | 1.609344 km/h | Road speed in the US and UK |
| 1 km/h | 0.6213711922 mph | Road speed in metric countries |
| 1 m/s | 3.6 km/h | Physics, wind, engineering |
| 1 ft/s | 0.3048 m/s | Engineering and ballistics |
| 1 knot | 1.852 km/h | Ships, aircraft, weather |
| Mach 1 | about 343 m/s | Aviation and acoustics |
Common speed examples
Highway speed60 mph is about 96.56 km/h, useful for road signs and travel planning.
Running pace12 km/h equals a 5:00 min/km pace or about 8:03 min/mile.
Wind reports15 m/s equals 54 km/h or about 29.16 knots.
Marine speed20 knots equals 37.04 km/h or about 23.02 mph.
Popular speed conversions
FAQ
How many kilometers per hour are in one mile per hour?
One mile per hour equals exactly 1.609344 kilometers per hour.
How many miles per hour are in 100 km/h?
100 km/h equals about 62.1371 mph.
What speed is Mach 1?
This converter uses 343 m/s as an approximate Mach 1 value at sea level and 20 C. Actual Mach speed changes with temperature and altitude.