Standard gravities (g)

Standard gravity (g or g₀) is the nominal acceleration of free fall at the Earth's surface, exactly 9.80665 m/s².

Convert standard gravities to any acceleration unit

1 standard gravity = 9.80665 meters per second squared

Quick facts

Unit
Standard gravity (plural: standard gravities)
Symbol
g
Measures
Acceleration
System
Common
Equals
9.80665 meters per second squared
Definition
Exactly 9.80665 m/s².
Also written
g-force, g0, gn, G

1 standard gravity in other units

Meters per second squared9.80665 m/s²
Feet per second squared32.17404856 ft/s²

What is a standard gravity?

Standard gravity (g or g₀) is the nominal acceleration of free fall at the Earth's surface, exactly 9.80665 m/s². It is used to express accelerations as "g-forces" in aviation, spaceflight, motorsport and crash testing.

Where the standard gravity sits among acceleration units

The standard gravity is number 14 of 16 on our scale of acceleration units, ordered from smallest to largest.

Foot per second squared1 g = 32.174 ft/s² Meter per second squared1 g = 9.80665 m/s² Standard gravitythis unit Jupiter gravity1 g♃ = 2.52788 g Sun gravity1 g☉ = 27.9402 g

Standard gravities in real life

  • Roller coasters peak at about 3–5 g
  • Astronauts feel about 3 g during launch
  • Fighter pilots pull up to 9 g

Top standard gravity conversions

Common amounts of standard gravities

Convert standard gravities to all 15 other units

Common

Vehicle

Planetary gravity

Convert to standard gravities

Frequently asked questions

What is a standard gravity?

Standard gravity (g or g₀) is the nominal acceleration of free fall at the Earth's surface, exactly 9.80665 m/s².

How is the standard gravity defined?

Exactly 9.80665 m/s².

How many meters per second squared are in a standard gravity?

One standard gravity equals 9.80665 meters per second squared.

How many feet per second squared are in a standard gravity?

One standard gravity equals 32.17404856 feet per second squared.