Home > VBOX Motorsport > General Information > Knowledge Base > How do we calculate Combined G?

How do we calculate Combined G?

Table of contents
No headers

Lateral and longitudinal acceleration (g forces) are both derived from vector velocities (Vx & Vy); as such, they have magnitudes and directions.


This calculation is not a case of simply adding the two velocity components together. As two forces are being measured at right angle degrees from one another, Pythagorean Theorem can be used to add the two vectors to gain the combined magnitude of the two forces.



Using the above theorem:

a = lateral g

b= longitudinal g

c = combined g


So, for example, a lateral accel value of 0.773 g, and a longitudinal acceleration value of 0.186 g would give a combined g value as shown below.


0.186² + 0.773² = 0.63213 

√0.63213 = 0.79507

Rounded to 0.795

You must to post a comment.
Last modified


This page has no custom tags.


This page has no classifications.
Having trouble finding what you need?