In analytical chemistry, gravimetric analysis is a method for quantitative chemical analysis in which the substance to be estimated is converted to a substance which can be separated pure and entire, and which is then weighed. Commonly a highly insoluble precipitate is formed, filtered off, washed, and dried (see dehydration). The weight of substance sought is calculated from the weight and composition of the precipitate.
In geophysics, gravimetric analysis is the study of Earth's gravitational field in a particular area. Small variations in the field can be caused by the density of the rocks beneath the surface and can provide information about structures that are otherwise inaccessible. The instrument used for such a survey is known as a gravimeter.