Concrete Depot Concrete Calculators & Tools

Patio Concrete Mix Calculator

Estimate patio concrete volume, cement, sand, gravel, water, waste, and a printable mix report with a live 3D patio diagram.

Measurement inputs

Live calculation
Used in the saved report and PDF.
Enter a length greater than 0.
Enter a width greater than 0.
Enter a thickness greater than 0.
Use this for same-size patio sections. Enter at least 1 section.
5% simple, 10% normal, 15% uneven work. Waste cannot be negative.
Cement : sand : gravel.
Enter a cement ratio above 0.
Enter a sand ratio above 0.
Enter a gravel ratio above 0.
Common estimate for dry ingredients. Enter a dry factor of 1 or more.
Used for a rough water estimate. Water-cement ratio cannot be negative.
Primary result Volume includes waste. Dry material volume is used to split cement, sand, and gravel.
–
Wet volume with waste––
Dry material volume––
Cement needed––
Sand needed––
Gravel needed––
Water estimate––
Patio area––
Base wet volume–Before waste.

Formula used

Shown in report
Volume = Patio area × Thickness
Dry material volume = Wet volume with waste × Dry volume factor
Cement / sand / gravel = Dry material volume × material ratio ÷ total ratio

    This calculator gives an estimate for site planning. Actual material use can change due to moisture, compaction, subgrade condition, batching method, and supplier yield.