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Speed Converter

Convert between km/h, mph, m/s, knots, and feet per second with exact conversion factors.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

All inputs are converted to m/s first, then to the target unit. Exact factors: 1 km/h = 0.277778 m/s, 1 mph = 0.44704 m/s, 1 knot = 0.514444 m/s.

In depth

Convert between km/h, mph, m/s, knots, and feet per second with exact conversion factors.