Welded-Wire Sheet Calculator
Estimate welded-wire reinforcement sheet count from slab dimensions, sheet size, laps, and allowance.
Editorial review: 2026-09-29 · How we review technical content
Key takeaways
- Estimate the number of welded-wire sheets needed to cover a rectangular area with entered lap.
- Actual lap requirements, sheet orientation, support height, reinforcement area, wire designation, and openings are project-specific. Roll reinforcement should be estimated differently.
Welded-Wire Sheet Calculator
Estimate the number of welded-wire sheets needed to cover a rectangular area with entered lap.
What this calculator does
Estimate the number of welded-wire sheets needed to cover a rectangular area with entered lap.
The tool reduces each sheet’s effective coverage by the entered lap and estimates sheets required in each direction, then applies an allowance.
How to use the result
Actual lap requirements, sheet orientation, support height, reinforcement area, wire designation, and openings are project-specific. Roll reinforcement should be estimated differently.
How this calculator works
The calculator estimates sheet count by reducing effective sheet coverage for the entered lap in both directions, then applies a final allowance.
Required lap/anchorage, sheet orientation, cutouts, chairs and project detailing can differ from this planning model.
Input checklist
- Area length: Enter the project-specific area length in ft.
- Area width: Enter the project-specific area width in ft.
- Sheet length: Enter the project-specific sheet length in ft.
- Sheet width: Enter the project-specific sheet width in ft.
- Approximate lap: Enter the project-specific approximate lap in in.
- Cut allowance: Enter the project-specific cut allowance in %.
Worked example
A nominal sheet does not cover its full plan dimensions when adjacent sheets overlap; effective coverage is smaller than gross sheet area.
Field checklist
- Confirm sheet dimensions from supplier.
- Use project-required lap and orientation.
- Plan supports so reinforcement stays at intended elevation.
References & further reading
- ACI SPEC-301-20 — Specifications for Concrete Construction — Reference specification used when incorporated into project specifications.
- NRMCA Concrete In Practice (CIP) — Industry education covering common concrete field problems and practices.
- ACI PRC-302.1-15 — Guide to Concrete Floor and Slab Construction — Construction guidance for slabs-on-ground and suspended floors.
- ACI PRC-360R-10 — Guide to Design of Slabs-on-Ground — Planning/design reference for nonstructural slabs-on-ground; structural slabs may fall under ACI 318.