# Free online acceleration converter

> Acceleration measures the rate of change of velocity. This converter handles 8 common acceleration units used in physics, engineering, and vehicle performance measurement.

Convert between 8 acceleration units including m/s², ft/s², standard gravity (g), galileo, and km/h per second. Enter a value, choose units, and get the full conversion table instantly.

**Interactive version:** https://onlinecalculator.me/unit-converters/acceleration/
**Category:** Unit Converters

## How to use

1. Enter the acceleration value.
2. Select the unit you are converting **from**.
3. Select the unit you are converting **to**.
4. The result and full conversion table appear instantly.
5. Click "Share with my numbers" to copy a URL with your inputs.

## Conversion factors (relative to m/s²)

| Unit | m/s² equivalent |
|------|----------------|
| m/s² | 1 |
| ft/s² | 0.3048 |
| Standard gravity (g) | 9.80665 |
| Galileo (Gal) | 0.01 |
| km/h per second | 0.277778 |
| mi/h per second | 0.44704 |
| in/s² | 0.0254 |
| cm/s² | 0.01 |

## Worked example

A sports car accelerates from 0 to 60 mph in 3 seconds, reaching **60 mi/h·s**.

Actually, 60 mph in 3 s = **20 mph/s** average acceleration.

Converting to m/s²: 20 × 0.44704 = **8.94 m/s²**

Converting to g: 8.94 ÷ 9.80665 ≈ **0.91 g**

## Notes

- Standard gravity (g) is exactly 9.80665 m/s² by BIPM definition (9th SI Brochure, 2019).
- Galileo (Gal) and cm/s² are equivalent units; both equal 0.01 m/s².
- km/h/s is useful for expressing vehicle acceleration in familiar speed units.

## Frequently asked questions

### How does the acceleration converter work?

Every unit is first converted to the base unit (m/s²) by multiplying by a fixed factor, then divided by the target unit's factor to get the result.

### What is standard gravity (g)?

Standard gravity (g) is defined as exactly 9.80665 m/s². It represents the nominal acceleration due to gravity at Earth's surface and is used as a reference in many engineering contexts.

### What is a Galileo (Gal)?

A Galileo (Gal) is a CGS unit of acceleration equal to 1 cm/s², or 0.01 m/s². It is used in gravimetry and geophysics.

### How do I convert g to m/s²?

Multiply the g value by 9.80665. For example, 3 g = 3 × 9.80665 = 29.42 m/s².

### What units are supported?

Meters per second squared (m/s²), feet per second squared (ft/s²), standard gravity (g), Galileo (Gal), kilometers per hour per second (km/h·s), miles per hour per second (mi/h·s), inches per second squared (in/s²), and centimeters per second squared (cm/s²).

## Sources

- [Acceleration (SI unit m/s²)](https://en.wikipedia.org/wiki/Acceleration) — Wikipedia
- [Standard gravity (g = 9.80665 m/s²)](https://en.wikipedia.org/wiki/Standard_gravity) — Wikipedia

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