# Gravitational field strength of the earth

1. Oct 23, 2012

### AbsoluteZer0

Hi,

Using the formula g = $\frac{GM}{r2}$ I found 'g' to equal (9.792121683 x 106 $\frac{N}{kg}$)

The value of g is 9.8 $\frac{N}{kg}$. I am wondering if I made an error in my calculations or if there is a method of simplifying to get 9.8.

Thanks,

2. Oct 23, 2012

### D H

Staff Emeritus
Units. Always check your units. You most likely divided by the square of the Earth's radius in kilometers.