Calculating the concrete volume of an isolated footing seems like hectic. We have explained the process (with diagram) step by step using this simple trapezoidal footing formula. Also embedded an easy to use trapezoidal volume calculator.
Unlike other units of measurement, this one is a bit complicated. For other types of civil works, we have some rules which are simple to follow. For painting, we have to calculate the surface area in coefficient method (IS 2015 – 1987)