Acceleration of gravity calculation on the surface of a planet. It's possible to calculate the acceleration above the surface by setting the sea level. But it won't be possible under the surface - this is a wrong formula.

This online calculator calculates the weight and the volume of the drop given the surface tension, diameter of the capillary tube, and density of the liquid

This online calculator can solve hydrostatic pressure problems by finding unknown values in the hydrostatic equation.

This online calculator estimates alcohol by volume (abv) based on original and final specific gravity values.