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Concrete Calculator
Concrete Calculator
Estimate the volume and weight of concrete needed for your project. Select a shape, enter your measurements, and get instant results. Use the waste factor slider to add extra for spillage and uneven surfaces.
Select Your Shape
Pick the shape that best matches your concrete project. Each shape has different measurements and a diagram showing exactly what to measure.
Measurements
Enter the dimensions of your project. Use the sliders or type values directly. All inputs update results instantly.
How to Measure
This diagram shows exactly which measurements to take. Match your measurements to the labeled dimensions.
Results Summary
Volume is how much space the concrete fills. Weight is based on ~150 lbs per cubic foot. Bag counts are approximate.
Volume0.00cubic yards
Volume0.00cubic feet
Weight0lbs
Waste Factor
Add a percentage for spillage, uneven sub-grade, over-excavation, and form irregularities. 5–10% is typical for most projects.
%
Detailed Breakdown
How many pre-mixed bags you need at different sizes, plus metric conversions.
| Metric | Value |
|---|
How It's Calculated
Each shape uses a standard geometric formula. All measurements are converted to feet first, then volume is calculated and converted.
This content on this site is for educational purposes only. Do not take any of this content as investment advice.
This content on this site is for educational purposes only. Do not take any of this content as investment advice.
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Discussing technology's human-amplifying potential
Discussing technology's human-amplifying potential