Concrete Volume Calculator

Calculate exactly how much concrete you need for your next construction project before ordering or buying bags. Choose from three project types including slabs and footings for rectangular pours, or post holes for cylindrical excavations, then enter the dimensions and an optional waste percentage buffer to avoid running short. Quick Start presets fill in typical patio, shed pad, trench footing, and fence post jobs in one tap so you can adjust from a realistic starting point instead of blank fields.

The app outputs the total volume in cubic feet and cubic yards along with a recommended order quantity rounded to the nearest quarter yard. It also tells you how many 60-pound and 80-pound bags are needed if you prefer mixing your own concrete, plus pour guidance on whether bag mix, a rented mixer, or ready-mix delivery fits the job size.

Save any scenario to reload it later — each saved job keeps its own dimensions, waste percentage, and notes, so you can reopen and recalculate a past estimate without re-entering numbers.