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Conversions

Acceleration Converter

Convert between m/s², cm/s², ft/s², g-force, Gal, and more acceleration units instantly.

What is Acceleration Converter?

An acceleration converter lets you switch between units of acceleration — the rate of change of velocity. The SI unit is metres per second squared (m/s²). G-force (g) compares acceleration to standard gravity (9.80665 m/s²) and is used in aviation and motorsport. The Gal (cm/s²) is used in geophysics for gravity measurements.

How to use

  1. 1 Enter the acceleration value in the Value field.
  2. 2 Select the unit you are converting from in the From dropdown.
  3. 3 Select the unit you want to convert to in the To dropdown.
  4. 4 The result and a full table of all equivalent accelerations appear instantly.
  5. 5 Click the swap button to reverse the conversion.

Formula

converted = input_value * (factor_of_from_unit / factor_of_to_unit), where all factors are expressed relative to m/s²

Example calculation

Standard gravity is 1 g = 9.80665 m/s² = 32.174 ft/s² = 980.665 Gal. A car braking hard at 0.8 g = 7.845 m/s² = 25.74 ft/s².

Frequently asked questions

What is 1 g in m/s²?

Standard gravity (g) is defined as exactly 9.80665 m/s². This is the nominal gravitational acceleration at Earth's surface at sea level and 45° latitude. Actual surface gravity varies from about 9.764 m/s² at the equator to 9.832 m/s² at the poles.

How many g-forces can a human withstand?

Trained fighter pilots in anti-G suits can withstand about 9 g briefly. Untrained people lose consciousness (G-LOC) at about 4–5 g sustained. Astronauts during launch experience about 3 g. Roller coasters typically produce 3–5 g at peak.

What is a Gal in seismology?

The Gal (symbol: Gal) equals 1 cm/s² = 0.01 m/s². It is the CGS unit of acceleration used in gravimetry and seismology, named after Galileo. Ground motion during earthquakes is often measured in Gal or milliGal (mGal).

What acceleration does a car experience during a crash?

In a 30 mph (48 km/h) crash that stops within 0.1 seconds, the deceleration is about 13.4 m/s² ≈ 1.37 g. High-speed crashes can involve 20–100 g peak accelerations over very short durations.

How does acceleration relate to force?

Newton's Second Law: F = ma. Force (newtons) equals mass (kg) times acceleration (m/s²). A 70 kg person on Earth feels a gravitational force of 70 × 9.80665 = 686.5 N (their weight).