Unit Converters

Speed Converter

Compare speeds across road, sport, marine and scientific units.

By TheCalcTools Updated Formula checked and tested

Your numbers

Your results

Kilometers per hour
Kilometers per hour
—
Meters per second
—
Miles per hour
—
Knots
—
Feet per second
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Speed Converter by TheCalcTools

How the Speed Converter works

Enter a speed and choose its unit.

Conversions run through km/h.

Use the knots result for marine and aviation speeds.

The formula

result = value × (factor of the ‘from’ unit ÷ factor of the ‘to’ unit)1 m/s = 3.6 km/h, 1 mph = 1.609344 km/h, 1 kn = 1.852 km/h

Worked example

Using the default values shown in the calculator:

Value100
FromKilometers per hour
  1. 100 Kilometers per hour equals 27.7778 Meters per second ; 62.1371 Miles per hour ; 53.9957 Knots.

Result:

Kilometers per hour100.0000
Meters per second27.7778
Miles per hour62.1371
Knots53.9957
Feet per second91.1344

Frequently asked questions

How do I convert km/h to mph?

Divide km/h by 1.609344, or multiply by about 0.6214.

What is a knot?

One nautical mile per hour, exactly 1.852 km/h.

Sources and further reading

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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.