Drywall Mud Calculator
Plan how much drywall mud is needed for taping and finishing walls or ceilings.
Reviewed by MaterialNeeded Editorial Team, Editorial review for field workflows and ordering assumptions.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Enter drywall area and finishing level assumptions to estimate mud quantity.
What the math is doing
Gallons = (sq ft ÷ 100) × 0.13 × (1+waste).
Frequently asked questions
Lightweight vs all purpose?
Coverage is similar per pass; heavy fills use more.
Setting compound?
Bags convert separately from this gallon model.
Texture?
Add extra for knockdown or orange peel.
Sanding dust?
Better taping reduces sanding waste.