How to use the Drywall Calculator

Estimate drywall sheet count from wall/ceiling area and selected sheet size.

Calculation formula

Drywall sheet count = ceil(surface area × (1 + waste%) ÷ (sheet width × sheet length)).

Recommended steps

1. Enter values using the units shown beside each field.
2. Review whether the example assumptions match your situation.
3. Run the calculator and compare the key metrics.
4. Use the source data or official rates when precision matters.

Known limitations

Estimate only; seam placement, openings, waste from cuts and fire-rated assembly rules require a material plan.