🔩 Rebar Calculator

Estimate rebar pieces, spacing, grid layout, linear feet, and weight for concrete slabs and footings.

How to Use This Rebar Calculator

Enter the project dimensions, include waste, and use the estimate to plan purchase quantities. Product coverage varies by brand, thickness, installation method, and local supplier packaging.

Planning Tips

  • Measure every section separately for irregular layouts.
  • Add 5-15% waste depending on cuts and complexity.
  • Round up to match bundles, rolls, bags, panels, or delivery units.

Frequently Asked Questions

How accurate is this rebar calculator?

It gives a planning estimate. Confirm final material quantities with local supplier coverage and site conditions.

How much waste should I add?

Use 5-10% for simple projects and 10-15% for complex layouts or angled cuts.