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Speed Converter

km/h, mph, m/s, knots and Mach - converted instantly.

How to use

  1. Enter the speed and its unit.
  2. Pick the target unit.
  3. Read the converted value instantly.

Frequently asked questions

What's a knot?

One nautical mile per hour = 1.852 km/h, used at sea and in aviation because nautical miles align with latitude minutes.

Quick km/h ↔ mph rule?

mph ≈ km/h × 0.62. So 100 km/h ≈ 62 mph.

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