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MPH to Meters per Second Converter

Convert miles per hour to meters per second instantly, with a reference table for physics problems and sports speeds.

MPH to M/S Converter

1 mph = 0.447 m/s

Multiply miles per hour by 0.44704 to get meters per second.

The link carries the values you entered, so whoever opens it sees the same result. Nothing is stored on our side — the numbers travel in the link itself.

Miles per hour to meters per second reference table

The conversions people look up most often, rounded to 4 decimal places.

Common miles per hour to meters per second conversions
Mile per hour (mph)Meter per second (m/s)
1 mph0.447 m/s
5 mph2.2352 m/s
10 mph4.4704 m/s
20 mph8.9408 m/s
27 mph12.0701 m/s
30 mph13.4112 m/s
45 mph20.1168 m/s
60 mph26.8224 m/s
70 mph31.2928 m/s
80 mph35.7632 m/s
100 mph44.704 m/s
150 mph67.056 m/s
200 mph89.408 m/s

The miles per hour people look up most

1 mph = 0.447 m/s
Just under half the SI unit, which is what every physics problem expects.
10 mph = 4.4704 m/s
A brisk jog, or a cyclist holding the flat without effort.
60 mph = 26.8224 m/s
The speed acceleration figures are quoted to in both the US and the UK.
70 mph = 31.2928 m/s
The UK motorway limit, expressed the way a physics problem would.
100 mph = 44.704 m/s
Fast enough that aerodynamic drag dominates everything else about a vehicle.

How the mph to m/s calculation works

A mile per hour is exactly 0.44704 meters per second:

m/s = mph × 0.44704

The factor is 1,609.344 metres divided by 3,600 seconds — both numbers exact, so the result is too.

Metres per second is the SI unit of speed, which is why it is the one physics uses. Every kinematic equation, every force calculation, every energy figure expects m/s: put mph into ½mv² and the answer is wrong by a factor of five.

Worth knowing: the reverse conversion is nearly a factor of 2.237, and m/s to km/h is exactly 3.6.

Sports and everyday speeds:

  • A brisk walk, 3 mph → 1.34 m/s
  • A 6-minute mile, 10 mph → 4.47 m/s
  • Usain Bolt's 100 m record pace, 27 mph → 10.44 m/s average, with a peak near 12.3 m/s
  • A 30 mph urban limit → 13.41 m/s
  • A 70 mph motorway limit → 31.29 m/s

Why the physics matters. Kinetic energy goes with the square of speed, so a car at 70 mph (31.3 m/s) carries 2.7 times the energy of the same car at 43 mph (19.2 m/s), not 1.6 times. That squared relationship is the single most important fact in road-safety arithmetic, and it is far easier to see in m/s than in mph.

Wind loading works the same way: doubling wind speed quadruples the force on a structure. Engineering wind speeds are given in m/s for exactly that reason.

For a rough figure, divide mph by 2.24.

Frequently asked questions

Why does physics use metres per second?

Because it is the SI unit, and every other mechanical quantity is built on it. Acceleration is metres per second squared, kinetic energy uses velocity squared, and momentum is kilograms times metres per second. Converting once at the start of a problem avoids carrying a conversion factor through every subsequent line.

What is terminal velocity in these units?

About 53 m/s for a skydiver falling belly to earth, which is roughly 120 mph, and above 90 m/s in a head-down dive. Terminal velocity depends on cross-section rather than mass alone, which is why changing body position alters it so much and why a parachute changes it completely.

How fast is the speed of sound?

About 343 m/s in air at 20 degrees, which is roughly 767 mph. It falls as air gets colder, so an aircraft at altitude reaches Mach 1 at a lower true airspeed than it would at sea level. That is why supersonic flight is described in Mach numbers rather than fixed speeds.

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