Acceleration Converter
Convert acceleration between m/s², cm/s² (Gal), mm/s², mGal, km/(h·s), ft/s², in/s², mph/s, kn/s and g — all at once.
m/s²
9.80665
cm/s² (Gal)
980.665
mm/s²
9,806.65
mGal
980,665
km/(h·s)
35.30394
ft/s²
32.174049
in/s²
386.08858
mph/s
21.936851
kn/s
19.062603
g (gravity)
1
How to use
- Type an acceleration value.
- Pick the unit you entered it in.
- Read the value in every other unit and copy whichever you need.
About this tool
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Enter an acceleration in any common unit and see it in all the others instantly: metre per second squared (m/s²), centimetre per second squared (cm/s², the Gal), millimetre per second squared (mm/s²), milligal (mGal), kilometre per hour per second (km/(h·s)), foot per second squared (ft/s²), inch per second squared (in/s²), mile per hour per second (mph/s), knot per second (kn/s) and standard gravity (g). The value is converted to m/s² internally and then to every unit, so conversions are exact. Handy for physics and engineering (m/s², ft/s²), vehicle performance (0–60 in mph/s or km/(h·s)), g-force (g) and geophysics/gravimetry (Gal, mGal). Everything is computed locally in your browser.
Frequently asked questions
What is 1 g in m/s² and ft/s²?
Standard gravity g = 9.80665 m/s² exactly, which is 32.174 ft/s². It's the reference acceleration free-falling objects gain near Earth's surface, and the unit used for g-force in vehicles and aircraft.
How fast is a 0–60 mph in 6 seconds in g?
60 mph in 6 s = 10 mph/s = 4.4704 m/s² ≈ 0.4558 g. Enter 10 with unit mph/s to see it in g and m/s². Sustained accelerations above ~1 g feel very strong.
What is a Gal and a milligal?
The Gal (galileo) is the CGS unit of acceleration: 1 Gal = 1 cm/s² = 0.01 m/s². Gravimetry uses the milligal (mGal) = 1e-5 m/s² to map tiny variations in Earth's gravity field for geology and surveying.
Is acceleration the same as speed?
No. Speed is how fast you move; acceleration is how fast your speed changes — the rate of change of velocity. Its units are speed-per-time (like m/s per second = m/s²), which is why km/(h·s) and mph/s appear here.
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