Acceleration Converter

Convert acceleration between m/s², standard gravity (g), ft/s², Gal and per-second speed changes such as km/h/s and mph/s.

How to use the Acceleration Converter

  1. Type the value you want to convert in the first box.
  2. Choose the unit you are converting from and the unit you want to convert to.
  3. Read the result instantly. Use the swap button to reverse the direction, or copy the result with one click.

Popular acceleration conversions

ConversionResultFormula
G to meters per second squared1 g = 9.80665 m/s²meters per second squared = g × 9.80665
Meters per second squared to g1 m/s² = 0.101972 gg = meters per second squared × 0.10197162
Meters per second squared to feet per second squared1 m/s² = 3.28084 ft/s²feet per second squared = meters per second squared × 3.2808399
Feet per second squared to meters per second squared1 ft/s² = 0.3048 m/s²meters per second squared = feet per second squared × 0.3048

Supported acceleration units

UnitSymbolEqual to
Meter per second squaredm/s²1 m/s²
Standard gravityg9.80665 m/s²
Foot per second squaredft/s²0.3048 m/s²
Inch per second squaredin/s²0.0254 m/s²
Gal (cm/s²)Gal0.01 m/s²
Millimeter per second squaredmm/s²0.001 m/s²
Kilometer per hour per secondkm/h/s0.27777778 m/s²
Mile per hour per secondmph/s0.44704 m/s²
Knot per secondkn/s0.51444444 m/s²

Understanding acceleration units

Acceleration is the rate at which velocity changes. The SI unit is the meter per second squared (m/s²): an acceleration of 1 m/s² adds 1 m/s to the speed every second.

Standard gravity, written g, is defined as exactly 9.80665 m/s². It is used to describe forces felt in vehicles, aircraft and rides. The Gal (1 cm/s²) is used in geophysics to measure small variations in the Earth’s gravity.

Car performance is often easier to picture in km/h per second. A car that reaches 100 km/h in 8 seconds averages 12.5 km/h/s, or about 3.47 m/s² (0.35 g).

Frequently asked questions

What is 1 g in m/s²?

One standard gravity is exactly 9.80665 m/s², or about 32.174 ft/s².

How do I convert m/s² to ft/s²?

Multiply by 3.28084. For example, 9.80665 m/s² equals 32.174 ft/s².

What is a Gal?

A Gal (galileo) is 1 cm/s², or 0.01 m/s². It is used in gravimetry.

Related tools