How do you calculate G's?

Answer 1

1 g is ~ 9.81 m/s2 which is the acceleration an object undergoes due to gravity.

The load or force exerted on a body due to gravity would be expressed by:

F=ma

Force = Mass x Acceleration

So the g-load would be the Object's Mass x 9.81 m/s2

See the link below for a more thorough explanation.

Answer 2

I suppose you mean as a measure of acceleration. Acceleration is defined as (difference of velocity) / time. For example, if you release an object (let it fall), it will start at rest, but one second later it will have a speed of about 9.8 meters/second. Thus, the acceleration is 9.8 meters/second/second; this is usually written as 9.8 meters/second2. This is an acceleration of 1 G (one times the acceleration due to gravity). Any other acceleration is compared to this; for example, if an astronaut in outer space is subjected to an acceleration of 30 meters/second2, he would feel a force of about 3 G (30 / 9.8 to be precise).