Converters
Speed Converter
Convert km/h, mph, m/s, knots and ft/s — for driving, running and weather.
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All conversions
About this tool
Speed limits in mph, running pace in m/s, wind in knots — different worlds, one converter. Convert between km/h, mph, meters per second, knots and feet per second with every unit displayed together.
Anchors: 100 km/h ≈ 62 mph, 1 m/s = 3.6 km/h, 1 knot ≈ 1.85 km/h.
How to use
- Enter a speed and its unit.
- Pick the target unit or swap.
- Read the result and the full table.
Frequently asked questions
Multiply by 0.6214 — 100 km/h is about 62 mph.
One nautical mile per hour (1.852 km/h), used at sea and in aviation because nautical miles map neatly onto latitude.
It is the SI unit — physics formulas expect meters and seconds without conversion factors.