Concrete Calculator
Estimate cubic feet, cubic yards, waste, and bag quantities for rectangular concrete projects.
LOCAL MATERIAL ESTIMATE
Estimate concrete
Your measurements stay in this browser and are not uploaded.
Free
How to calculate concrete
Multiply length × width × thickness or depth, using feet for all dimensions. Divide cubic feet by 27 to get cubic yards.
Cubic feet vs cubic yards
Ready-mix concrete is commonly ordered by the cubic yard, while bagged concrete lists a nominal yield. Add extra material for waste, uneven ground, and spillage.
Bagged concrete vs ready-mix
Bag yields vary by manufacturer. This estimator uses approximate 40 lb, 60 lb, and 80 lb yields and rounds bag purchases upward.
Related tools
For area-only measurements, use the Square Footage Calculator. A dedicated Concrete Slab Calculator is coming soon.