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Speed Conversion Matrix

All 10 speed units in one table — 90 pre-computed conversions, click any cell for the full converter.

Speed Conversion Matrix — All 10×9 Conversions

Click any cell

How to read: rows are the from unit, columns are the to unit. Each cell shows how many column-units equal 1 row-unit. Click any cell for its full converter.

	km/h Kilometer per Hour	m/s Meter per Second	mph Mile per Hour	kn Knot	Ma Mach	ft/s Foot per Second	cm/s Centimeter per Second	yd/min Yard per Minute	in/min Inch per Minute	Bft Beaufort Scale
km/h Kilometer per Hour	—	0.277778	0.621371	0.539957	0.000816	0.911344	27.777778	18.226888	656.68506	0.277778
m/s Meter per Second	3.6	—	2.236936	1.943845	0.002939	3.28084	100	65.616798	2,364.0662	1
mph Mile per Hour	1.609344	0.44704	—	0.868976	0.001314	1.466667	44.704	29.333333	1,056.8322	0.44704
kn Knot	1.852	0.514444	1.150779	—	0.001512	1.68781	51.444444	33.756197	1,216.1807	0.514444
Ma Mach	1,225.044	340.29	761.20705	661.47085	—	1,116.437	34,029	22,328.74	804,468.09	340.29
ft/s Foot per Second	1.09728	0.3048	0.681818	0.592484	0.000896	—	30.48	20	720.56738	0.3048
cm/s Centimeter per Second	0.036	0.01	0.022369	0.019438	0.00002939	0.032808	—	0.656168	23.640662	0.01
yd/min Yard per Minute	0.054864	0.01524	0.034091	0.029624	0.00004479	0.05	1.524	—	36.028369	0.01524
in/min Inch per Minute	0.001523	0.000423	0.000946	0.000822	0.000001243	0.001388	0.0423	0.027756	—	0.000423
Bft Beaufort Scale	3.6	1	2.236936	1.943845	0.002939	3.28084	100	65.616798	2,364.0662	—

Popular Speed Conversions

Most-used tools

Meter per Second → Kilometer per Hour

1 m/s = 3.6 km/h

Meter per Second → Mile per Hour

1 m/s = 2.236936 mph

Meter per Second → Knot

1 m/s = 1.943845 kn

Meter per Second → Mach

1 m/s = 0.002939 Ma

Meter per Second → Foot per Second

1 m/s = 3.28084 ft/s

Meter per Second → Centimeter per Second

1 m/s = 100 cm/s

About Speed Conversion

Speed measures distance traveled per unit time. The SI unit is meters per second (m/s), but everyday usage varies widely by domain and country: kilometers per hour (km/h) dominates road speeds in 195 countries, miles per hour (mph) is American/British road usage, knots (nautical miles per hour) are universal in marine and aviation, and Mach (multiples of sound speed, ~343 m/s) is used in supersonic aviation. This converter handles all major speed units: SI standard (m/s, cm/s), road-traffic (km/h, mph), navigation (knot, ft/s), specialty (Mach, Beaufort scale, light-speed for astronomy), and manufacturing feed rates (in/min, yd/min). The Beaufort scale (0–12) describes wind force descriptively, with non-linear conversion to numeric speeds. Use speed conversion for vehicle performance, athletic timing, weather forecasting, marine and aviation navigation, ballistics, and engineering. The km/h is the most-used speed unit globally.

Quick Speed Conversion Tips

1 m/s = 3.6 km/h. A common multiplier in physics problems.
Car speedometers: km/h in most of the world, mph in US and UK (with km/h on EU sold cars).
Knots are used in aviation and marine. 1 knot = 1.852 km/h.
Mach is the ratio of an object's speed to the local speed of sound. Mach 1 varies with altitude and temperature.

Common Speed Mistakes

Forgetting to divide by 3.6 when going from km/h to m/s.
Reading a US speedometer as km/h — 70 mph is 112 km/h.
Treating Mach as a constant speed — sound speed changes with altitude (340 m/s at sea level, 295 m/s at 11 km).
Confusing speed (m/s) with velocity (m/s with direction) in physics.

Related Resources

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What is meter per second?

In-depth definition, history and use cases

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