Acceleration Converter
Convert between acceleration units — meters, feet, inches, and miles per second squared, standard gravity (g), Galileo, and knots per second.
Results from this calculator are estimates provided for general informational purposes only, based on formulas, rates, and standards commonly accepted as of 2026. Figures may differ slightly from other calculators or professional sources due to rounding methods, differing assumptions, or regional regulations, and rules may change over time. Always consult a qualified professional — such as a financial advisor, healthcare provider, or other relevant specialist — before making decisions based on these results.
Result
1 g = 9.80665 m/s²
1 Standard Gravity = 9.80665 Meters per Second Squared
1 Meter per Second Squared = 0.10197162 Standard Gravity
1 g in every supported unit
What is an Acceleration Converter?
Acceleration measures how quickly velocity changes — speeding up, slowing down, or changing direction, all over a given period of time. An acceleration converter translates a value in one acceleration unit into its equivalent in another, so a car's 0-60 mph performance figure, a roller coaster's g-force rating, and a physics textbook's meters-per-second-squared value can all be compared on the same scale.
The SI world measures acceleration in meters per second squared, US engineering often mixes speed units with seconds (like mph per second), and anything involving human tolerance to g-forces — aerospace, roller coasters, crash testing — uses standard gravity (g) as a natural reference point. Every unit below is defined relative to the meter per second squared, the SI derived unit of acceleration, so any conversion reduces to a single multiplication.
Conversion chart: Standard Gravity to Meters per Second Squared
Conversion table
| Standard Gravity (g) | Meter per Second Squared (m/s²) |
|---|---|
| 0.01 g | 0.0980665 m/s² |
| 0.1 g | 0.980665 m/s² |
| 1 g | 9.80665 m/s² |
| 2 g | 19.6133 m/s² |
| 3 g | 29.41995 m/s² |
| 5 g | 49.03325 m/s² |
| 10 g | 98.0665 m/s² |
| 20 g | 196.133 m/s² |
| 50 g | 490.3325 m/s² |
| 100 g | 980.665 m/s² |
| 1000 g | 9806.65 m/s² |
Supported Units
| Unit | Symbol | In Meters per Second Squared |
|---|---|---|
| Meter per Second Squared | m/s² | 1 m/s² |
| Kilometer per Hour per Second | km/(h·s) | 0.27777778 m/s² |
| Standard Gravity | g | 9.80665 m/s² |
| Galileo | Gal | 0.01 m/s² |
| Foot per Second Squared | ft/s² | 0.3048 m/s² |
| Inch per Second Squared | in/s² | 0.0254 m/s² |
| Mile per Second Squared | mi/s² | 1609.344 m/s² |
| Mile per Hour per Second | mph/s | 0.44704 m/s² |
| Knot per Second | kn/s | 0.51444444 m/s² |
| Yard per Second Squared | yd/s² | 0.9144 m/s² |
About These Parameters
- Value
- The acceleration value you want to convert, expressed in the "From" unit. Accepts decimals.
- From Unit
- The acceleration unit your input value is currently measured in — for example, standard gravity (g) for a crash-test rating or mph per second for a car's acceleration figure.
- To Unit
- The acceleration unit you want the result converted into. Use the swap button to flip From and To instantly.
How Acceleration Conversion Works
The Formula
Every unit here is defined by a fixed multiplier relative to the meter per second squared. To convert a value from one unit to another:
result = value × (factor of "From" unit ÷ factor of "To" unit)
For Standard Gravity → Meter per Second Squared: multiply by 9.80665. For example, 1 g × 9.80665 = 9.80665 m/s².
Why Standard Gravity (g) Is a Natural Reference Unit
Standard gravity, fixed at exactly 9.80665 m/s², is the acceleration a falling object experiences at Earth's surface — and, not coincidentally, the acceleration a human body feels as ordinary weight while standing still. Because every person has an intuitive sense of what "1 g" feels like, aerospace engineers, roller coaster designers, and crash-test analysts describe extreme accelerations as multiples of g (fighter pilots may black out around 8-9 g) rather than in raw meters per second squared, which carries no built-in point of reference.
Acceleration vs. Velocity vs. Speed
Speed and velocity describe how fast something is moving right now; acceleration describes how quickly that speed is changing. A car cruising steadily at 65 mph on a highway has velocity but zero acceleration, while the same car merging onto the highway and speeding up from 0 to 65 mph in 8 seconds has significant acceleration during that interval. This is exactly why vehicle acceleration is commonly reported as a 0-60 time rather than a single number — the underlying acceleration unit (like mph per second here) captures the rate of change directly.
Example
1 g equals 9.80665 m/s². For scale, that's about 1× standard gravity (1 g, or 1 g) — a typical car accelerating from 0 to 60 mph in 8 seconds averages roughly 0.34 g, while a commercial jet's takeoff roll is usually under 0.5 g.
Frequently Asked Questions
What does "1 g" actually mean?
One g is standard gravity, fixed at exactly 9.80665 m/s² — the acceleration you experience due to Earth's gravity while standing still. It's used as a reference unit because it corresponds to a feeling everyone already knows: your own body weight. An acceleration of 2 g feels like being pressed down with twice your normal weight.
How is a car's 0-60 mph time related to acceleration?
A 0-60 mph time is a snapshot of average acceleration over that interval — divide 60 mph by the number of seconds it took to get the average mph-per-second acceleration. A car that reaches 60 mph in 6 seconds is averaging 10 mph/s (about 0.45 g), though actual acceleration is usually stronger at lower speeds and tapers off as the car approaches 60 mph.
How accurate are these conversions?
Every conversion factor used here is the exact, internationally recognized value (e.g. standard gravity is fixed at exactly 9.80665 m/s², and 1 mile = exactly 1,609.344 m) — results are limited only by floating-point display precision, not by rounded conversion constants.