Drywall & Interior Calculators

Drywall and interior calculators cover sheet counts, paint gallons, and flooring quantities for interior finish work.

Backer Board CalculatorBaseboard CalculatorBlown-In Insulation CalculatorCarpet CalculatorCarpet Tile CalculatorCaulk CalculatorCeiling Fan Size CalculatorCeiling Paint CalculatorCeiling Tile CalculatorDrywall CalculatorDrywall Mud CalculatorEpoxy Floor CalculatorFlooring CalculatorFlooring Underlayment CalculatorGrout CalculatorHardwood Flooring CalculatorInsulation CalculatorPaint CalculatorPrimer CalculatorRecessed Lighting CalculatorThinset CalculatorTile CalculatorVinyl Plank CalculatorWainscoting CalculatorWallpaper Calculator

Frequently asked questions

What size drywall sheet should I use?

The standard 4×8 ft sheet (32 sq ft) suits most walls and DIY handling. Larger 4×10 and 4×12 sheets mean fewer joints to tape and mud, but they are heavy and awkward without a helper or a lift.

Do I calculate walls and ceilings together?

You can, add the ceiling area to your wall area for a single total sheet count. Just note that ceilings often use 5/8-inch sheets (for sag resistance and fire rating) while walls typically use 1/2-inch, so you may want separate counts per thickness.

How much mud and tape does drywall need?

A common rule of thumb is about one gallon of joint compound and 37 feet of tape per 100 square feet of drywall. Buy mud in the larger buckets, it keeps well and running out mid-coat is a nuisance.