Concrete Footing Calculator

Estimate concrete for strip footings or pad footings. Get cubic yards, cubic feet, bag counts, cost, formula steps, and a printable report.

Measurement inputs

Enter footing dimensions. Results update as you type.

Live calculation

Project name Used in the saved and printed report.

Unit system

Switches starter units only.

Footing type Use quantity for repeated footings.

Length

Enter a length greater than 0.

Width

Enter a width greater than 0.

Depth

Enter a depth greater than 0.

Number of footings Enter at least 1 footing.

Waste

10% is common for small concrete jobs. Waste cannot be negative.

Cost per cubic yard Optional. Leave as 0 if you do not need cost. Cost cannot be negative.

Bag estimate based on Bag counts are rounded up to whole bags.

The same SVG is used in the report.

Length —

Width —

Depth —

Footings —

Use these numbers for ordering checks. Always confirm final footing size with local code or a qualified pro.

Order quantity with waste

Includes waste percentage.

—

Base volume—

Cubic feet—

Cubic meters—

Estimated cost—

40 lb bags—

60 lb bags—

80 lb bags—

Top area—

Note: This calculator estimates concrete volume only. Soil bearing, frost depth, rebar, and footing size may need code review or engineering.

Formula used

Volume = Length × Width × Depth × Quantity

All measurements are converted to feet first. Cubic yards are found by dividing cubic feet by 27.

Calculation steps