Speed converters

Speed (or strictly velocity, with direction) is distance per unit time. The SI unit is meters per second (m/s), but kilometers per hour (km/h) and miles per hour (mph) dominate everyday road signs. All factors here are exact: 1 km/h = 1/3.6 m/s, 1 mph = 0.44704 m/s, 1 knot = 1852/3600 m/s.

Popular speed conversions

Meters per second to Kilometers per hour

m/s → km/h

Meters per second to Miles per hour

m/s → mph

Meters per second to Knots

m/s → kn

Kilometers per hour to Meters per second

km/h → m/s

Kilometers per hour to Miles per hour

km/h → mph

Kilometers per hour to Knots

km/h → kn

Miles per hour to Meters per second

mph → m/s

Miles per hour to Kilometers per hour

mph → km/h

Miles per hour to Knots

mph → kn

Knots to Meters per second

kn → m/s

Knots to Kilometers per hour

kn → km/h

Knots to Miles per hour

kn → mph

All speed units

The 4 units below can be selected as source or target inside any speed converter.

Meters per second
m/s · Metric
Kilometers per hour
km/h · Metric
Miles per hour
mph · Imperial
Knots
kn · Other

Speed units in terms of the meter per second

Every speed unit on Convertitive is defined as an exact ratio of the meter per second (m/s), the reference unit for this category. The table below shows what one of each unit equals in meters per second — the constant every converter on this page is built from.

Speed units expressed in meters per second
Unit	Symbol	1 unit in meters per second
Meters per second	m/s	base unit
Kilometers per hour	km/h	0.277778 m/s
Miles per hour	mph	0.44704 m/s
Knots	kn	0.514444 m/s

To convert between any two units, Convertitive scales the input to meters per second using these factors and then back out to the target unit — so every result on this page traces to a single, exact definition rather than a chained approximation. Pick any pair above to see the formula, a 50-row reference table, and worked examples.