Convert m/s², g-force, ft/s², and km/h². Free tool for physics and engineering.
Acceleration measures the rate of change of velocity over time, and its best-known everyday unit, "g" (standard gravity), represents how much an object accelerates in free fall at Earth's surface: approximately 9.8 metres per second squared. This value isn't arbitrary - it's the direct result of the planet's mass and the distance to its center of gravity, as described by Newton's law formulated in the 17th century. Curiously, this value varies slightly around the globe: it's a bit higher at the poles (where you're closer to Earth's center of mass) and lower at the equator, due to the planet's flattening and the centrifugal force of Earth's rotation. By international convention, scientists use the standard value of 9.80665 m/s² as a single reference for calculations requiring a fixed number. This converter calculates between metres per second squared, "g," feet per second squared, and other acceleration units, essential for automotive and aerospace engineers assessing vehicle performance, physicists and students working with classical mechanics, vehicle safety professionals calculating impact forces, and high-performance car enthusiasts comparing technical specifications across different measurement systems.
The standard gravitational acceleration is g = 9.80665 m/s² (defined by BIPM).
Divide by 9.80665. Example: 19.6133 m/s² ÷ 9.80665 = 2g.
1G = 9.80665 m/s². It is the acceleration felt at rest on the Earth's surface.
1 Gal = 1 cm/s² = 0.01 m/s². Used in geophysics and seismology.
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