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CALCULATOR · Converters

Speed Converter

km/h, mph, m/s, ft/s and knots converted with exact factors — no rounded shortcuts.

Show formula
knot = 1852 m/h · mph = 0.44704 m/s exactly

Inputs

Result

Your result appears here

Enter Value to convert and the result fills in as you type.

How it works

  1. Enter the value you want to convert.
  2. Pick the source and target units — use ⇄ to swap instantly.
  3. Read the converted result with full precision.

Frequently asked questions

Are these exact definitions?

Yes — knots, mph, km/h, ft/s and m/s all convert through internationally defined constants, so no rounding creeps into the conversion itself.

What is a knot?

One nautical mile per hour, where a nautical mile is exactly 1852 metres. It works out at roughly 1.852 km/h or 1.151 mph.

How do I convert mph to km/h in my head?

Multiply by 1.6 for a close estimate — 60 mph is about 96 km/h. The converter uses the exact factor of 1.609344.

How do I convert m/s to km/h?

Multiply by 3.6 — an hour has 3,600 seconds and a kilometre 1,000 metres — so 10 m/s = 36 km/h. Divide by 3.6 to go back.

Examples

What is 100 km/h in mph?
62.14 mph (100 ÷ 1.609344).
What is 60 mph in km/h?
96.56 km/h (60 × 1.609344).
What is 20 knots in km/h?
37.04 km/h (20 × 1.852).

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