How do I convert km/h to mph?
Divide km/h by 1.60934. For example, 100 km/h ≈ 62.137 mph.
Speed Converter
Convert travel, sports, and scientific speed units between metric and imperial systems.
Convert a speed value
Enter a speed, choose the current unit, and convert to another speed unit.
About this converter
How to use Speed Converter, plus the formulas and logic behind the results.
Tool description
The Speed Converter changes a rate of travel between meters per second, kilometers per hour, miles per hour, knots, and feet per second. It reports speed magnitude only; direction is not used.
How to use
- Enter the speed number.
- Select the unit of that speed.
- Select the unit you want.
- Select Convert to see the converted speed and equivalents in other units.
Formulas
base m/s = input × factor of the source unitoutput = base m/s ÷ factor of the target unit1 km/h = 1/3.6 m/s, 1 mph = 0.44704 m/s, 1 kn = 0.514444 m/s
Quick reference
- 1 m/s = 3.6 km/h
- 1 mph ≈ 1.60934 km/h
- 1 knot ≈ 1.852 km/h
- 1 ft/s = 0.3048 m/s
Calculation logic
Speed is converted to meters per second, then scaled to the target unit. Knots use the international nautical mile (1,852 m) per hour.
Speed conversions assume constant velocity and standard unit definitions.
Speed Converter FAQ
Common questions about this converter and how to use the results.
How do I convert mph to km/h?
Multiply mph by 1.60934. For example, 60 mph ≈ 96.561 km/h.
What is a knot?
A knot is one nautical mile per hour, about 1.852 km/h.
How do I convert m/s to km/h?
Multiply meters per second by 3.6.
When is feet per second used?
Feet per second is common in physics, ballistics, and some engineering contexts.
Are speed and velocity the same here?
This converter treats numeric speed magnitude. Direction is not included.