# SlabCalc

> A 10×10 slab at 4 in needs 1.23 cubic yards or 56 bags of 80-lb mix.

A 10×10 slab at 4 in needs 1.23 cubic yards or 56 bags of 80-lb mix. Get cubic yards, bag counts, and weight for slabs, footings, sonotubes, walls, and steps.

## Facts
- Website: https://www.slabcalc.co
- Pricing: free
- Categories: AI & Machine Learning
- LotsDirectory page: https://lots.directory/products/slabcalc
- Listing state: Unclaimed. We listed this product from its public website, and its owner has not claimed it yet.

## Detailed info

## What is SlabCalc?

SlabCalc is a free online concrete calculator that estimates material volume, bag counts, and weight for construction projects.

## What SlabCalc does

SlabCalc calculates required concrete volume and bag quantities for slabs, footings, sonotubes, curbs, walls, and steps. It supports Imperial and Metric unit systems, configurable waste factor percentages, and bag size options including 40lb, 50lb, 60lb, and 80lb mixes.

## Who SlabCalc is for

For contractors, builders, and DIY homeowners planning concrete pours for patios, driveways, footings, and structural projects.

## How SlabCalc works

Users choose a project shape, select Imperial or Metric units, enter project dimensions, adjust the waste factor percentage, and calculate cubic yards, cubic meters, total weight, and required bag quantities.

## Key features

- The tool estimates concrete volume for slabs, cylinders, sonotubes, curbs, and stairs.
- Users can switch between Imperial and Metric unit measurements.
- Waste Factor options include 5%, 10%, and 15% allowances.
- The calculator provides bag count breakdowns for 40lb, 50lb, 60lb, and 80lb concrete mixes.
- The calculator provides cubic yards, cubic meters, and estimated weight in pounds.

## Facts from slabcalc.co, checked 13 October 2026

- The tool requires no signup or payment to use.
- The calculator estimates 40lb, 50lb, 60lb, and 80lb mixes.
- Volume results are provided in both cubic yards and cubic meters.

Written from SlabCalc's own website ([Homepage](https://www.slabcalc.co/), [About](https://www.slabcalc.co/about)). The maker can claim this listing to edit it.

## FAQ

### Is SlabCalc free to use?
Yes. SlabCalc is free with no signup or paywalls required.

### Which shapes does the calculator support?
The tool supports calculations for slabs, footings, cylinders, sonotubes, curbs, walls, and steps.

### Why include a waste factor in calculations?
An extra allowance accounts for uneven ground, spills, and form deflection during pours.

### Which bag sizes are estimated?
The calculator estimates bag counts for 40lb, 50lb, 60lb, and 80lb premixed bags.

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Source: https://lots.directory/products/slabcalc · Machine-readable context by LotsDirectory.