Part of the Units & Conversions suite · 14 calculators

M/S to MPH Converter

Convert meters per second to miles per hour — the physics unit into the everyday one. Results update as you type; exact factors shown.

One meter per second is 2.2369 miles per hour — see the exact factor, not a rounded rule of thumb.

Direction
Results update as you type
Results
1 m/s in miles per hour
2.2369 mph
Conversion factor
Reverse conversion
In meter per second (base unit)
Reviewed September 2026. Exact conversion factors from the BIPM SI Brochure and NIST SP 811; The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
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About speed conversion

How the m/s to mph converter works

Speeds convert through meters per second. 1 km/h is 1000/3600 m/s; 1 mph is 1609.344/3600 m/s; a knot is one nautical mile (1,852 m) per hour. Mach is shown against the standard sea-level speed of sound of 340.29 m/s and varies with altitude and temperature.

The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.

Common speed conversions

FromToUnits
1 m/s2.2369 mphmeter per second to miles per hour
2 m/s4.4739 mphmeter per second to miles per hour
5 m/s11.1847 mphmeter per second to miles per hour
10 m/s22.3694 mphmeter per second to miles per hour
15 m/s33.554 mphmeter per second to miles per hour
20 m/s44.7387 mphmeter per second to miles per hour
25 m/s55.9234 mphmeter per second to miles per hour
30 m/s67.1081 mphmeter per second to miles per hour
40 m/s89.4775 mphmeter per second to miles per hour
50 m/s111.8468 mphmeter per second to miles per hour
100 m/s223.6936 mphmeter per second to miles per hour
343 m/s767.2691 mphmeter per second to miles per hour

Units in this converter and their exact factors

UnitSymbolOne unit in meter per seconds
meter per secondm/s1 meter per second
kilometer per hourkm/h0.2777777778 meter per second
mile per hourmph0.44704 meter per second
knotkn0.5144444444 meter per second
foot per secondft/s0.3048 meter per second
Mach (sea level, 15 °C)Ma340.29 meter per second

Frequently asked questions about speed conversion

How many mph is 1 m/s?

2.237 mph.

What is 10 m/s?

22.4 mph — roughly the top speed of a world-class sprinter.

How fast is the speed of sound?

About 343 m/s at 20°C, which is 767 mph.

How do I convert to km/h instead?

Multiply by 3.6.

Why do physicists use m/s?

Because it is the SI unit, so it combines cleanly with meters and seconds in every other formula.

Where these figures come from

Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.