- Add Rooms — Enter length, width, height, doors, windows.
- Settings — Coats, coverage per gallon, price.
- Calculate — See wall area, paintable area, gallons, cost.
Paint Calculator — Estimate Wall Paint Needed
The Paint Calculator helps you estimate how much paint you need for any room or entire house. Add multiple rooms with dimensions, specify doors and windows for accurate deductions, set coating layers and coverage rate.
How It Works
Wall Area = 2 × (Length + Width) × Height. Door deduction = 21 sq ft each. Window deduction = 15 sq ft each. Gallons = (Paintable Area × Coats) ÷ Coverage per gallon.
Features
- Multi-Room — Add as many rooms as needed.
- Door/Window Deduction — Accurate area calculation.
- Coat Layers — 1 to 5 coats supported.
- Cost Estimate — Enter price per gallon for budget.
Privacy
All calculations run in your browser.