Concrete Estimator
Concrete Calculator & Material Estimator
Free tools to estimate concrete volume, cubic yards, bags, waste factor, and material cost.
Instant estimate · 40/60/80 lb bags · US and metric units
Concrete estimator guide
Popular concrete calculator tools
Choose the calculator that matches the job
Use the main concrete calculator when you need volume, bags, waste factor, and optional material cost for several project shapes.
Use the slab calculator for patios, driveways, sidewalks, garage floors, and other flat work. Use the bag calculator when your main question is how many bags to buy.
How concrete estimates work
Most concrete estimates start with volume. The calculator converts your dimensions into cubic feet, cubic yards, and cubic meters, then applies the waste factor you select.
Bag counts are rounded up because partial bags cannot usually be purchased or mixed as exact material.
cubic yards = cubic feet / 27
Concrete bag yield reference
Bag yield varies by brand and mix type. Always check the yield printed on the concrete mix bag before purchasing.
| Bag size | Approx yield |
|---|---|
| 40 lb | 0.30 cubic feet |
| 60 lb | 0.45 cubic feet |
| 80 lb | 0.60 cubic feet |
FAQ
Common questions
Is this concrete estimator free?+
Yes. The calculators estimate concrete volume, bags, waste factor, and material cost without sign-up.
Can I estimate 40, 60, and 80 lb bags?+
Yes. The tools show estimated bag counts for 40 lb, 60 lb, and 80 lb concrete mix using common approximate yields.
Does the estimate include labor or delivery?+
No. Cost estimates use the material price you enter and do not include delivery fees, taxes, labor, or reinforcement.
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