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How to use
The acceleration converter covers SI m/s², standard gravity gₙ, imperial units, Gal/mGal used in gravimetry and vehicle-style speed-change-per-second units. Every conversion is normalized through m/s².
- Enter a signed acceleration value.
- Choose source and target units.
- Calculate to see the target plus m/s², g, ft/s², Gal and km/h/s equivalents.
- Interpret the sign using your chosen coordinate axis; negative acceleration does not always mean speed magnitude is decreasing.
How it is calculated
Example
1 standard g is exactly 9.80665 m/s² under the defined standard, about 32.1740 ft/s², 980.665 Gal and 35.30394 km/h gained per second.
Important notes
gₙ here is standard gravity defined as 9.80665 m/s², not the measured local gravitational acceleration at your location. Gal equals cm/s² and mGal equals 10⁻⁵ m/s². This is a unit converter; predicting motion also requires time, velocity and other conditions.
Worked examples and interpreting results
This calculator converts acceleration units. One standard gravity equals 9.80665 m/s², while 100 Gal equals 1 m/s². Gal is an acceleration unit here, not a gallon of volume.
| Case | Calculation | Result |
|---|---|---|
| Standard gravity to m/s² | 1 × 9.80665 | 9.80665 m/s² |
| 100 Gal to m/s² | 100 × 0.01 | 1 m/s² |
How to check the result
The unit m/s² measures velocity change per second, not velocity itself. A negative sign describes direction relative to the chosen axis. Standard g is a conversion reference; local gravitational acceleration can differ slightly.
Frequently asked questions
How much is 1 g?
Standard gravity gₙ is 9.80665 m/s² by the definition used for conversion.
Is a Gal the same as cm/s²?
Yes. 1 Gal = 1 cm/s² = 0.01 m/s².
Can I convert negative acceleration?
Yes. Sign can represent direction along a chosen axis, so the converter preserves it.