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Concrete Calculator
Calculate how much concrete you need for slabs, footings, columns, and walls. Find cubic yards and number of 60 lb or 80 lb bags.
Cubic Feet
33.33 cu ft
Cubic Yards
1.23 cu yd
80-lb Bags
47 bags
60-lb Bags
62 bags
How to Use the Concrete Calculator
Enter your values above for an instant result. This tool uses verified formulas and is optimised for users in USA, Canada, UK, Australia. All calculations happen in your browser — your data is never sent to our servers.
Frequently Asked Questions
How many bags of concrete do I need for a 10x10 slab?
For a 10×10 ft slab at 4 inches thick: you need 1.23 cubic yards or about 45 80-lb bags of concrete.