Speed Converter

km/h, mph, metres per second, feet per second and knots.

0.6213711922 mph
1 km/h = 0.6213711922 mph
1 kilometre per hour in every speed unit
metre per second0.27777778 m/s
mile per hour0.62137119 mph
foot per second0.91134442 ft/s
knot0.5399568 kn

kilometre per hour to mile per hour table

kilometre per hour (km/h)mile per hour (mph)
10.62137119
21.2427424
53.106856
106.2137119
2012.427424
5031.06856
10062.137119
250155.3428
500310.6856
1,000621.37119

Units and factors

UnitSymbolIn metre per seconds
metre per secondm/s1
kilometre per hourkm/h0.2777777778
mile per hourmph0.44704
foot per secondft/s0.3048
knotkn0.5144444444

Single conversions

Questions people ask

How do I convert kilometre per hours to mile per hours?

Multiply by 0.6213711922. For example 10 km/h = 6.2137119 mph.

What is the base unit for speed?

The converter uses the metre per second as its internal base. Every unit is converted to metre per seconds and then to the target unit, so any pair of units works.

Where do the conversion factors come from?

From the legal definitions published in NIST Special Publication 811 and the SI Brochure (BIPM). Where a unit is defined exactly, the factor is exact.