Acceleration Converter
Turn any acceleration into a different unit — m/s², ft/s², g, galileo, km/h/s, and mph/s — using exact, published factors.
m/s²-based
Every unit is a fixed multiple of the metre per second squared, so the converter pivots through m/s² for one consistent rule.
Display rounding
Results are shown to six decimal places, so very large or very small conversions may round the last digit.
What is an acceleration converter?
One value, any unit
An acceleration converter changes a reading from one unit into another — g to m/s², m/s² to g, ft/s² to m/s², galileo to m/s², and back. It works by translating every value through a single shared pivot, the metre per second squared (m/s²), so any pair of units converts with one consistent rule. This tool covers the six units used in physics, engineering, geophysics, motorsport, and aviation: metre per second squared, foot per second squared, standard gravity (g), galileo (Gal), kilometre per hour per second, and mile per hour per second.
Acceleration units share a zero point, so converting is purely multiplicative — scale by the factor in, then by the factor out.
result = value × (m/s² per from-unit) ÷ (m/s² per to-unit)Because the metre per second squared is the SI base unit, each unit has a fixed number of m/s²: 1 g is exactly 9.80665 m/s² (the free-fall acceleration near Earth's surface), 1 Gal is 0.01 m/s² (the CGS unit used in geophysics), and 1 ft/s² is 0.3048 m/s². The speed-build rates fold a second's worth of speed gain into m/s²: 0–100 km/h in t seconds averages about (27.78 / t) m/s². The converter turns your value into m/s² first, then into the unit you want — so a single rule handles every direction.
Suppose you want to convert 1 g into m/s².
Convert to m/s²
Multiply by the g factor: 1 × 9.80665 = 9.80665 m/s².Convert out to m/s²
Divide by the m/s² factor: 9.80665 ÷ 1 = 9.80665.Read the result
1 g converts to 9.80665 m/s² — the acceleration of an object in free fall near sea level.
Acceleration conversion is a simple ratio, so the everyday anchors are easy to remember. The g tells you how many times Earth's gravity an acceleration equals: 1 g ≈ 9.81 m/s² is what you feel standing still, a brisk roller coaster peaks around 4–5 g, and fighter pilots train to withstand 9 g. The Gal belongs to geophysics, where Earth's pull is about 980 Gal and survey maps show tiny milligal differences. The km/h/s and mph/s rates express how fast speed builds for cars: a hot hatch doing 0–100 km/h in 6 seconds averages roughly 16.7 km/h/s, or about 4.63 m/s². If a converted number looks far off by a factor of ten or a hundred, check that the from-unit and to-unit are not swapped — the swap arrow flips them in one click.
The arithmetic is exact; the limits are about precision and what acceleration means.
Precision and local gravity
The g and foot factors are exact by definition; the galileo and the speed-build rates reduce to m/s² through exact relationships. Results are rounded to six decimal places, so conversions with long decimal tails may lose the last digit. Note that the standard gravity g = 9.80665 m/s² is a defined constant — actual local gravity varies from about 9.78 m/s² at the equator to 9.83 m/s² at the poles, so weight-sensitive work should use the measured local value rather than the nominal g.