About Acceleration Units & Conversions
Acceleration measures the rate of change of velocity. In physics and engineering, you’ll most often see it in
metres per second squared (m/s²), the SI unit. Some fields, however, prefer convenient
alternatives such as standard gravity (g) for human-centric loads, Gal for
geophysics, or everyday transport units like km/h/s and mph/s. This converter
lets you move between them instantly and precisely.
- m/s² (SI) — Base unit. One m/s² means velocity increases by 1 metre per second every second.
- g (standard gravity) — Defined constant for Earth’s gravity at sea level:
1 g = 9.80665 m/s². Useful for acceleration loads on people, vehicles, and electronics.
- ft/s² — Imperial/US customary analogue:
1 ft/s² = 0.3048 m/s²; equivalently 1 m/s² ≈ 3.28084 ft/s².
- in/s² — Finer imperial unit:
1 in/s² = 0.0254 m/s²; 1 m/s² ≈ 39.3701 in/s².
- Gal (Galileo) — Geophysics & gravimetry:
1 Gal = 1 cm/s² = 0.01 m/s². Submultiples:
mGal = 1×10⁻⁵ m/s², µGal = 1×10⁻⁸ m/s² (micro-gals measure tiny gravity changes).
- km/h/s — Transport & rail: change in kilometres per hour every second.
1 km/h/s = (1000/3600) m/s² ≈ 0.27778 m/s².
- mph/s — Automotive & aviation legacy:
1 mph/s = 1609.344/3600 m/s² ≈ 0.44704 m/s².
- knot/s — Maritime & aviation:
1 kt/s = 1852/3600 m/s² ≈ 0.51444 m/s².
How to Convert
The simplest approach is to convert your input to m/s², then to the target unit. For example, to convert
3 m/s² into g, divide by standard gravity:
3 / 9.80665 ≈ 0.305 g. To go the other way, multiply:
0.305 g × 9.80665 ≈ 3.00 m/s².
m/s² to g conversion table
| m/s² | g |
|---|
| 1 | 0.1019716213 |
| 5 | 0.5098581065 |
| 9.80665 | 1 |
| 10 | 1.019716213 |
| 100 | 10.19716213 |
g to m/s² conversion table
| g | m/s² |
|---|
| 0.1 | 0.980665 |
| 0.5 | 4.903325 |
| 1 | 9.80665 |
| 2 | 19.6133 |
| 10 | 98.0665 |
m/s² to ft/s² conversion table
| m/s² | ft/s² |
|---|
| 1 | 3.280839895 |
| 5 | 16.40419948 |
| 9.80665 | 32.17404856 |
| 10 | 32.80839895 |
| 100 | 328.0839895 |
Gal to m/s² conversion table
| Gal | m/s² |
|---|
| 1 | 0.01 |
| 10 | 0.1 |
| 100 | 1 |
| 980.665 | 9.80665 |
| 1000 | 10 |
Typical Use Cases
- Human tolerance — Rollercoasters and rockets quote peak loads in g.
- Geophysics — Gravity anomalies and tidal effects are reported in mGal or µGal.
- Transport — Trains, cars, and ships often list throttle/braking as km/h/s, mph/s, or knot/s.
Precision & Formatting
This tool supports fixed and scientific notation with adjustable digits. For very small signals (e.g., µGal-level),
select scientific notation to avoid rounding away meaningful detail. All calculations run locally in your browser
for privacy; you can copy any row or share a deep link with your chosen inputs and formatting.
