<P> All that was needed to obtain a numerical value for standard gravity was now to measure the gravitational strength at the International Bureau . This task was given to Gilbert Étienne Defforges of the Geographic Service of the French Army . The value he found, based on measurements taken in March and April 1888, was 9.80991 (5) m ⋅ s . </P> <P> This result formed the basis for determining the value still used today for standard gravity . The third General Conference on Weights and Measures, held in 1901, adopted a resolution declaring as follows: </P> <P> The value adopted in the International Service of Weights and Measures for the standard acceleration due to Earth's gravity is 980.665 cm / s, value already stated in the laws of some countries . </P> <P> The numeric value adopted for ɡ was, in accordance with the 1887 CIPM declaration, obtained by dividing Defforges's result--980.991 cm ⋅ s in the cgs system then en vogue--by 1.0003322 while not taking more digits than warranted considering the uncertainty in the result . </P>

Rate of acceleration due to gravity in feet