Home improvement
Drywall Calculator
Estimate drywall sheets for room walls and an optional ceiling. Nothing you enter leaves your browser.
Enter your values, then calculate.
Calculation method
A transparent estimate.
Every adjustable assumption stays visible in the calculator, and discrete materials are rounded up only when it is time to buy.
(wall area − openings + optional ceiling) × (1 + waste %) ÷ panel areaWhat this estimate assumes
- The default adds 10% for cuts and waste.
- Ordinary doors and windows can be left in as a built-in buffer; subtract only measured large openings.
- Compound, tape, and screw figures are planning guides based on installed area; specialty panels and installation methods vary.
Research sources
Simple by design
Get the answer, without the clutter.
FormatCalc is built for quick work. This drywall calculator runs entirely on your device, so private text and data stay private.
Enter or paste your information.
02Set the values that matter to you.
03Copy, use, or download your result.
Common questions
Using the Drywall Calculator
Is the Drywall Calculator free to use?
Yes. FormatCalc's Drywall Calculator is free to use with no account required.
Is my data private when I use the Drywall Calculator?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the Drywall Calculator?
Enter your values, select any units, and choose Estimate drywall. You can then copy the result.
How is the Drywall Calculator calculated?
It uses (wall area − openings + optional ceiling) × (1 + waste %) ÷ panel area. The result is a planning estimate, so confirm the coverage or yield printed on your selected product.