Concrete Calculator

Estimate bags of concrete and volume for slabs, footings, and tubes.

Dimensions
Total length of the slab or patio.
Total width of the slab or patio.
Depth/Height of the slab. Standard is 4 inches.
 
%
 
Recommended

0

bags

80lb Bags (Pre-Mix)

0

60lb Bags

0

Cubic Yards

Visual Reference
Length: 10 ftWidth: 10 ftThick: 4 in

Metric Bags

0bags
25kg
0bags
40kg

Exact Volume

0ft³
Cubic Feet
0
Cubic Meters
Documentation

How It Works

We normalize all inputs to cubic feet/meters and then apply standard concrete yields.

Volume = L × W × T

+ Waste = Volume × 1.05

Yields Used:
80lb Bag ≈ 0.6 ft³
60lb Bag ≈ 0.45 ft³
25kg Bag ≈ 0.0115 m³
40kg Bag ≈ 0.0184 m³

Live Breakdown

Base Volume0 ft³
With 5% Waste0 ft³
How to Use

About the Concrete Calculator

What it calculates

This concrete calculator estimates material quantities and project costs for home improvement work. Calculate concrete bags and cubic yards for slabs and footings.

When to use it

Use before purchasing materials to reduce waste and budget more accurately for DIY or contractor projects.

Example

Adjust the inputs above to model your specific scenario with the Concrete Calculator.

Explore More

Related Calculators