Acceleration Converter
Convert acceleration between metres per second squared, g-force and feet per second squared — the units of crash tests, launches and physics.
Enter a value
Result
1 g-force =
9.80665 m/s²
1 × 9.80665 = 9.80665
Show the working
- 1. Convert 1 g-force to m/s²s: 1 × 9.80665 = 9.80665.
- 2. Convert to m/s²: 9.80665 ÷ 1 = 9.80665.
1 g-force in every unit
Everyday accelerations
- City bus, gentle start
- 1.3 m/s² (0.13 g)
- Sports car, full throttle
- 5 m/s² (0.5 g)
- Hard emergency braking
- 9 m/s² (0.9 g)
- Space Shuttle at liftoff
- 19.6 m/s² (2 g)
- Formula 1 cornering
- up to 49 m/s² (5 g)
- Roller coaster peak
- 40–50 m/s² (4–5 g)
Good to know: Earth gravity is 1 g = 9.80665 m/s²; a hard brake stop is close to 1 g.
About this tool
Convert acceleration between m/s², g-force and ft/s² — for physics, crash testing and vehicle performance.
Formula
1 g = 9.80665 m/s²; 1 ft/s² = 0.3048 m/s²; 1 m/s² = 0.10197 g.
Reference values
- 1 g = 9.80665 m/s²
- 1 g = 32.174 ft/s²
- Free fall accelerates at 1 g
Questions people ask
How fast is 1 g in m/s²?
Exactly 9.80665 m/s² — the standard value agreed internationally for ordinary gravity.
How many g is 100 km/h braking?
Stopping from 100 km/h in 35 m is about 11 m/s² — roughly 1.1 g.
Why use ft/s²?
US engineering specs quote feet per second squared: 32.174 ft/s² equals 1 g.
Related tools
How we calculate this
Acceleration uses the SI m/s², the standard gravity 9.80665 m/s² for g-force and the exact foot (0.3048 m). Source: BIPM (SI Brochure).
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