Speed Converter
mph, km/h, m/s, knots — one tool.
Convert between every common unit of speed.
Part of: Unit Conversion Tools
Enter the value to convert below
Fields marked optional can be skipped; results update as you type
6
All conversions
m/s27.777778
km/h100
mph62.137119
Knots53.995727
ft/s91.134442
100 km/h = 62.137119 mph.
- 1 mph
- 1.609344 km/h
- m/s
- 27.777778
Reverse: 1 mph = 1.609344 km/h.
How to use
- Enter a value.
- Pick source and target units.
Examples
100 km/h
= 62.14 mph = 27.78 m/s = 53.996 knots
Before you use the converted value
Confirm the starting unit, the target unit, and the amount before copying the answer. Conversions are exact math, but real-world use may still need rounding, tolerance, safety margin, or a local convention.
If the converted value affects cost, quantity, time, or safety, use the related calculator or guide before making the final decision.
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Frequently asked questions
› What is a knot? Definition
One nautical mile per hour. 1 knot = 1.852 km/h.