Drywall Calculator

Measure total wall and ceiling area in square feet, then divide by sheet size (32 sqft for 4x8, 48 sqft for 4x12). Add 10-15% for waste from cuts and mistakes. A typical 12x12 room with 8-ft ceilings needs about 18 sheets of 4x8 drywall.

Plan for approximately 0.05 gallons of joint compound per square foot of drywall. A 5-gallon bucket covers about 100 square feet of finished joints. For a standard room, 1-2 buckets is typical.

1/2-inch is standard for walls. 5/8-inch is required for ceilings (sag-resistant) and fire-rated walls (Type X). 1/4-inch is used for curved walls. Moisture-resistant (green board) is used in bathrooms and kitchens.

The Drywall Calculator is an online tool that lets you calculate drywall sheets, joint compound, tape, and screws needed for walls and ceilings. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Using the Drywall Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. Follow the controls on the page. Some functions require sign-in or a paid plan; see Pricing for limits.

The Free plan includes 10 tool uses per day. Some features require an account or a paid plan. Check the controls on the tool page and Pricing for the applicable limits.

The Drywall Calculator returns results based on the inputs and the tool methodology. Check assumptions, units and source dates. Treat projections as estimates. For critical decisions, always consult a qualified professional.

Yes, the Drywall Calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers. Simply open NexTool in your mobile browser and navigate to the tool — no app download required.