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In the field guide
slabcalc
slabcalc.co
SlabCalc is a free online concrete calculator that helps users determine the exact amount of concrete needed for various project shapes such as slabs, footings, sonotubes, walls, curbs, and steps. It supports both imperial and metric units and provides calculations including cubic yards, bag counts, and weight with waste factors.
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The product, beyond the pitch
Editorially reviewed · Sources checked Sep 16, 2026
A good fit for
- DIYers and professionals needing precise concrete volume and material estimates for various project shapes and sizes.
- Users requiring free, no-signup, unlimited project calculations with detailed engineering specs and cost guidance.
Know the limitations
- Does not provide direct ordering or delivery services for concrete materials.
What you can do
- Calculating concrete volume and bag counts for residential slabs, footings, walls, curbs, and steps.
- Estimating concrete requirements for both small projects using bagged concrete and larger projects using ready-mix concrete.
Features
- Supports calculation for multiple concrete shapes including slabs, cylinders, curbs, stairs, columns, walls, footings, circles, and tubes.
- Supports both imperial and metric unit systems for project measurements.
- Includes waste factor options (none, 5%, 10%, 15%) to account for spillage and uneven ground.
Integrations
Not confirmed yet.
Platforms & data export
- Provides engineering specs and detailed calculation results that can be copied for project use.
slabcalc pricing
No plans recorded yet.
THE COST FOR YOUR TEAM
Go beyond the starting price.
Published plan prices for your team size and usage. Results update as you type. Taxes, currency conversion and unlisted add-ons are excluded, and anything the source did not state is called out rather than guessed.
Known monthly subtotal
$0/month
1 of 1 tools could not be priced with these inputs, so this is not the full cost.
| Tool / plan | Monthly | Per year | What this assumes |
|---|---|---|---|
| No pricing recorded yet. Check the official site, or ask the owner to add it. | |||
A practical workflow
- Select the project shape (e.g., slab, footing, sonotube, wall, curb, steps).
- Enter project dimensions in imperial or metric units including length, width, thickness, and quantity.
- Choose a waste factor percentage to account for spillage and uneven surfaces, then calculate to get volume, bag counts, and weight.
Based on the sources below. Editorial review does not imply hands-on product testing.
Alternatives to explore
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