What is 1 g in m/s²?

1 g (standard gravity) = 9.80665 m/s² exactly (defined by CGPM). Earth's surface gravity varies slightly around this value.

What is a Gal (Galileo)?

1 Gal = 1 cm/s² = 0.01 m/s². It is used in gravimetry to measure gravitational field variations. 1 mGal = 10 μm/s².

How many g is a typical car braking?

Emergency braking ≈ 0.8–1.0 g. High-performance cars: ≈ 1.2–1.4 g. Formula 1 braking: up to 5–6 g.

Is this tool browser-based and private?

Yes - all calculations run entirely in JavaScript in your browser.

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Acceleration Converter

Live

From

Sig. figures:

Sci notation

Metre per second squared

m/s²

9.80665

Centimetre per second squared (Gal)

cm/s² (Gal)

980.665

Millimetre per second squared

mm/s²

9806.65

Kilometre per second squared

km/s²

0.00980665

Kilometre per hour per second

km/h·s

35.3039

Foot per second squared

ft/s²

32.174

Inch per second squared

in/s²

386.089

Mile per hour per second

mph/s

21.9369

Knot per second

kn/s

19.0626

Standard gravity (g)

1(input)

Milli-g (milligravity)

1000

Micro-g

μg

1.00000e+6

Galileo (Gal)

Gal

980.665

Milligal

mGal

980665

Hover any row to copy or use as input.

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Convert between all standard acceleration units in three groups: SI (m/s², cm/s²/Gal, mm/s², km/s², km/h·s), Imperial (ft/s², in/s², mph/s, knot/s), and G-force & Other (g, mg, μg, Gal, mGal). Includes real-world values for free fall, F1 braking (5–6 g), fighter jets, Moon gravity, and typical car acceleration. Adjustable significant figures, scientific notation toggle, swap, per-row copy.

How to Use

1Enter an acceleration value in the From field and choose the source unit (e.g. g)
2Select the target unit in the To dropdown (e.g. m/s²) to see the instant result
3Browse SI, Imperial, and G-force groups in the results panel
4Hover any row and click Copy or ↕ to copy or set as input
5Toggle Sci notation for very large or very small values
6Open the Reference panel for real-world g-force examples

Features

SI group: m/s², cm/s² (Gal), mm/s², km/s², km/h·s
Imperial group: ft/s², in/s², mph/s, knot/s
G-force group: g, mg, μg, Gal, mGal
Instant two-way conversion with From/To selectors and swap button
3–12 significant figures and scientific notation toggle
Reference panel with F1 braking, fighter jets, Moon gravity, car acceleration
100% browser-based - all conversions in JavaScript

Acceleration Converter

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