Concrete Calculator

Calculate exactly how much concrete you need for your project

Select Project Type:

Slab Dimensions

Options

Waste Factor (Overage) 10%

Units:

Optional Cost Estimate

Price per Cubic Yard ($)

Price per 80lb Bag ($)

Your Concrete Estimate

Total Concrete Needed

0.00

Cubic Yards

Bags Needed

40 lb bags 0

60 lb bags 0

80 lb bags 0

Cost Estimates

Ready-Mix $0

80 lb Bags $0

Recommendation

Thickness Guide

Project	Thickness
Walkway	4"
Patio	4"
Driveway	5-6"
Garage	4-6"
Foundation	8-12"

Frequently Asked Questions

For a 10×10 foot slab that's 4 inches thick, you'll need approximately 1.23 cubic yards or 56 bags of 80-lb concrete mix including 10% waste factor.

A cubic yard of wet concrete weighs approximately 3,900-4,100 pounds (about 2 tons).

Use bagged concrete for projects under 1 cubic yard. Ready-mix is more economical for projects over 2 cubic yards.

Standard thicknesses: 4 inches for patios and walkways, 5-6 inches for residential driveways, 6-8 inches for heavy vehicle driveways.

Concrete is walkable after 24-48 hours. It reaches 70% strength in 7 days and full strength in 28 days. Keep concrete moist during the first week for proper curing.