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Free online acceleration converter

Acceleration measures the rate of change of velocity. This converter handles 8 common acceleration units used in physics, engineering, and vehicle performance measurement.

About this calculator

How to use

  1. Enter the acceleration value.
  2. Select the unit you are converting from.
  3. Select the unit you are converting to.
  4. The result and full conversion table appear instantly.
  5. Click “Share with my numbers” to copy a URL with your inputs.

Conversion factors (relative to m/s²)

Unitm/s² equivalent
m/s²1
ft/s²0.3048
Standard gravity (g)9.80665
Galileo (Gal)0.01
km/h per second0.277778
mi/h per second0.44704
in/s²0.0254
cm/s²0.01

Worked example

A sports car accelerates from 0 to 60 mph in 3 seconds, reaching 60 mi/h·s.

Actually, 60 mph in 3 s = 20 mph/s average acceleration.

Converting to m/s²: 20 × 0.44704 = 8.94 m/s²

Converting to g: 8.94 ÷ 9.80665 ≈ 0.91 g

Notes

  • Standard gravity (g) is exactly 9.80665 m/s² by BIPM definition (9th SI Brochure, 2019).
  • Galileo (Gal) and cm/s² are equivalent units; both equal 0.01 m/s².
  • km/h/s is useful for expressing vehicle acceleration in familiar speed units.

Frequently asked

How does the acceleration converter work?
Every unit is first converted to the base unit (m/s²) by multiplying by a fixed factor, then divided by the target unit's factor to get the result.
What is standard gravity (g)?
Standard gravity (g) is defined as exactly 9.80665 m/s². It represents the nominal acceleration due to gravity at Earth's surface and is used as a reference in many engineering contexts.
What is a Galileo (Gal)?
A Galileo (Gal) is a CGS unit of acceleration equal to 1 cm/s², or 0.01 m/s². It is used in gravimetry and geophysics.
How do I convert g to m/s²?
Multiply the g value by 9.80665. For example, 3 g = 3 × 9.80665 = 29.42 m/s².
What units are supported?
Meters per second squared (m/s²), feet per second squared (ft/s²), standard gravity (g), Galileo (Gal), kilometers per hour per second (km/h·s), miles per hour per second (mi/h·s), inches per second squared (in/s²), and centimeters per second squared (cm/s²).