🚀 Speed converter

Speed Converter

Convert any speed unit to all others at once — m/s, km/h, mph, kn, ft/s.

Results

Meter per Second (m/s)
1 m/s
Kilometer per Hour (km/h)
3.6 km/h
Mile per Hour (mph)
2.23693629205 mph
Knot (kn)
1.94384449244 kn
Foot per Second (ft/s)
3.28083989501 ft/s

📊 Speed Converter chart

Conversion line — plotted against input value.

What is the Speed Converter?

Convert any speed unit to all others at once — m/s, km/h, mph, kn, ft/s. Speed conversions are used for driving, aviation, sailing, sports and physics problems. Every conversion uses the exact internationally defined factor, so results are precise to 12 significant digits.

Speed Converter – free online speed tool illustration
Speed Converter — free, exact and private.

How to use the Speed Converter

  1. Enter your value, your from unit.
  2. Results update automatically as you type; you can also press Calculate.
  3. Read the output: meter per second (m/s), kilometer per hour (km/h), mile per hour (mph), knot (kn).
  4. Check the chart to see how the conversion scales.

Formula and method

value in target = value × (factor of source ÷ factor of target)

Worked example

With value = 1, from unit = Meter per Second (m/s), the Speed Converter returns meter per second (m/s): 1 m/s; kilometer per hour (km/h): 3.6 km/h; mile per hour (mph): 2.23693629205 mph.

Tips for better results

  • Double-check which system a unit belongs to (for example US vs UK gallons).
  • Use the swap button to convert in the opposite direction instantly.
  • Bookmark the conversions you use most — each pair has its own page.

Frequently asked questions

What does the Speed Converter do?

Convert any speed unit to all others at once — m/s, km/h, mph, kn, ft/s.

How is it calculated?

The Speed Converter uses this method: value in target = value × (factor of source ÷ factor of target).

Can you show an example?

With value = 1, from unit = Meter per Second (m/s), the Speed Converter returns meter per second (m/s): 1 m/s; kilometer per hour (km/h): 3.6 km/h; mile per hour (mph): 2.23693629205 mph.

Is the Speed Converter accurate?

Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.

Is this tool free and private?

Yes — the Speed Converter is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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