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

Divide the km/h value by 3.6. For example, 90 km/h is 25 m/s. Multiply by 3.6 to go back the other way.

A knot is one nautical mile per hour, about 1.852 km/h, used in aviation and marine navigation.

How fast is the speed of sound?

The speed of sound in dry air at 20°C is about 343 m/s, which is roughly 1,235 km/h or 767 mph.

How do I turn a running pace into speed?

Speed in km/h equals 60 divided by your pace in minutes per kilometre. A 5 min/km pace is 12 km/h.

Speed Converter

Convert km/h, mph, m/s, knots and feet per second.

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Length, weight, area, volume, speed, data and more — convert any unit offline, free, on Android.

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About the Speed Converter

Speed limits, wind speeds and running paces all come in different units — kilometres per hour, miles per hour, metres per second, knots at sea and in the air. The AlarmDaddy Speed Converter switches between all of them instantly.

Enter a speed, choose the units, and read the result plus every unit at once — handy for converting a car's mph to km/h or a wind forecast from knots.

How to use this converter

1Enter the speed value.
2Choose the unit to convert from.
3Choose the unit to convert to.
4Read the result and the all-units table.

The formula

result = value × (factor_from ÷ factor_to), where each factor is the unit's size in metres per second.

Each unit is defined in metres per second (1 km/h = 0.2777… m/s, 1 mph = 0.44704 m/s, 1 knot = 0.514444 m/s). The value is converted to m/s, then divided by the target unit.

Frequently asked questions

Multiply miles per hour by 1.60934. For example, 60 mph is about 96.6 km/h. To convert km/h to mph, divide by the same number.

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