Drywall Mud & Tape Calculator

Finishing drywall takes more than the sheets themselves, and this tool sizes up the joint compound, tape, corner bead and sandpaper to match the number of panels you're hanging. Getting those quantities close keeps your budget honest and spares you both the overbuy and the dead stop when you run dry mid-coat. Pin the numbers down and the job moves at pace without blowing past what you planned to spend.

The estimates rest on fixed per-sheet rates for standard 4x8 panels (32 square feet each): tape at 12 feet per sheet, one corner bead per four sheets and one sheet of sandpaper per two panels, with joint compound estimated from the panel area. They are priced at $18 per 4.5-gallon pail of compound, $8 per 250-foot roll of tape, $5 per corner bead and $1.50 per sandpaper sheet. Screws are not included; the drywall calculator counts them.

Treat the output as a starting estimate, because rooms full of corners or arches eat through far more tape and mud than a plain rectangle does. Build in a 10 to 15% cushion on every total for the inevitable spills, waste, and touch-ups. The figure people most often shortchange is compound, since a proper finish takes at least three separate coats, so make sure your numbers are sized for all of them.