Speed Converter
Type a speed once, in any unit, and see it in every unit at once
Kilometer per hour
↑ ↓ step by 1 · Shift × 10 · Alt × 0.1 · or type the unit, e.g. 120 km/h, 60 mph or 25 knots
m/s
km/h
mph
kn
ft/s
≈ 2.2 × Usain Bolt at full speed
For scale, Usain Bolt at full speed is about 44.6 km/hConversions
Decimals
Metric
Meter per second
Kilometer per hour
Input
Imperial / US
Foot per second
Mile per hour
Nautical
Knot
How to convert speed
- Type a speed with its unit, e.g. 120 km/h, 60 mph or 25 knots.
- See it in every unit at once: metric, imperial / US, nautical and scientific.
- Click a value to copy it, or set the decimals.
- Copy the link to share the conversion.
Questions
How do I convert km/h to mph?
Divide by 1.609344: 100 km/h is about 62.1 mph.
What is a knot?
One nautical mile an hour, 1.852 km/h, used at sea and in the air.
Can I convert to Mach?
Yes, Mach and the speed of light are among the units.
Is it accurate?
Yes, conversions use the exact definitions of the units.