Estimate joint compound for taping and finishing drywall.
Sheet area is summed, multiplied by the coats for taping and two finish coats, then divided by typical mud coverage. Finishing needs more coats than most expect, and mud goes bad once opened, so estimating avoids waste and mid-job trips.
Drywall Joint Compound
Gallons = sheets x 32 sq ft x coats / 80
Gallons = sheets x 32 sq ft x coats / 80 Sheet area is summed, multiplied by the coats for taping and two finish coats, then divided by typical mud coverage.
Finishing needs more coats than most expect, and mud goes bad once opened, so estimating avoids waste and mid-job trips.
This calculator takes 2 inputs: Panels (4x8), Coat factor. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.