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🧱 Concrete Calculator

Calculate how many bags of concrete or cubic yards you need for your project. Enter your dimensions and get an instant cost estimate.

Project Details

Length (feet)

Width (feet)

Depth / Thickness (inches)

Standard slab is 4 inches

Your Estimate

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Adjust the fields to see your estimate.

Cost Breakdown

Recommended Tools & Supplies

Mix bags without making a mess

Spread and smooth the surface

Finish the surface smooth

Concrete burns bare skin

Save your knees on ground work

Keep your slab flat and even

Hold your forms in place

Move mixed concrete to the pour site

Pro Tips

✓ Add 10% extra for waste and spillage
✓ Standard slab thickness is 4 inches; driveways need 5-6 inches
✓ One 80lb bag covers about 0.6 cubic feet
✓ For large projects (>1 cubic yard), ordering ready-mix is usually cheaper

Prices are estimates. Links go to Amazon — we may earn a small commission at no extra cost to you.

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