G-Force Calculator
Calculate g-force instantly in your browser — the published formula, worked locally with no data sent anywhere.
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What this tool does
Calculate g-force instantly in your browser — the published formula, worked locally with no data sent anywhere. G-force here is proper acceleration in units of standard gravity. Brief human tolerance reaches about 5 g sustained for trained pilots with g-suits; the numbers for crashes are peak values lasting milliseconds.
How to use the G-Force Calculator
- Enter or select motion type.
- Enter or select speed (m/s).
- Enter or select turn radius (m).
- Enter or select acceleration (m/s²).
- Read the calculated result; change any measurement to compare alternatives.
Formula
g-force = acceleration ÷ 9.80665. In a turn the centripetal acceleration is v²/r; the total felt g in a level turn or loop also combines with ordinary gravity (shown separately).
- mode
- Motion type
- velocity
- Speed (m/s)
- radius
- Turn radius (m)
- accel
- Acceleration (m/s²)
G-force here is proper acceleration in units of standard gravity. Brief human tolerance reaches about 5 g sustained for trained pilots with g-suits; the numbers for crashes are peak values lasting milliseconds.
Worked example
For g-force calculator, the following measurements illustrate the exact method: Motion type: curve; Speed (m/s): 20; Turn radius (m): 50; Acceleration (m/s²): 19.6.
Inputs
- Motion typeCircular motion (v²/r)
- Speed (m/s)20
- Turn radius (m)50
- Acceleration (m/s²)19.6
Result
- Acceleration in g0.82
- Acceleration (m/s²)8
- Acceleration (ft/s²)26.25
- Total felt g including gravity (level turn)1.29
Results explained
- Acceleration in g
- Acceleration in g from the formula above. G-force here is proper acceleration in units of standard gravity. Brief human tolerance reaches about 5 g sustained for trained pilots with g-suits; the numbers for crashes are peak values lasting milliseconds.
- Acceleration (m/s²)
- Acceleration (m/s²) from the formula above. G-force here is proper acceleration in units of standard gravity. Brief human tolerance reaches about 5 g sustained for trained pilots with g-suits; the numbers for crashes are peak values lasting milliseconds.
- Acceleration (ft/s²)
- Acceleration (ft/s²) from the formula above. G-force here is proper acceleration in units of standard gravity. Brief human tolerance reaches about 5 g sustained for trained pilots with g-suits; the numbers for crashes are peak values lasting milliseconds.
- Total felt g including gravity (level turn)
- Total felt g including gravity (level turn) from the formula above. G-force here is proper acceleration in units of standard gravity. Brief human tolerance reaches about 5 g sustained for trained pilots with g-suits; the numbers for crashes are peak values lasting milliseconds.
Frequently asked questions
g-force = acceleration ÷ 9.80665. In a turn the centripetal acceleration is v²/r; the total felt g in a level turn or loop also combines with ordinary gravity (shown separately).
G-force here is proper acceleration in units of standard gravity. Brief human tolerance reaches about 5 g sustained for trained pilots with g-suits; the numbers for crashes are peak values lasting milliseconds.
Every field is labelled with its unit — enter values in exactly the labelled unit and read the result in the labelled output unit. Fields with a unit symbol also support the site-wide imperial/metric switch, which converts before the formula runs.
It uses double-precision arithmetic and the published constants and formulas named on this page. The last displayed digit may be rounded, and real conditions can differ from the idealized model described in the assumptions.
Yes. Every calculation runs entirely in your browser; nothing you enter is uploaded, stored or shared.