Paint Cost Calculator – Volume, Can Mix & Total Price
Use this paint cost calculator to turn your room size and coverage into a shopping list with prices. Enter your room dimensions (or a direct paintable area), choose the number of coats, set a realistic coverage rate, and add your local can prices. We calculate total litres/gallons, suggest a can mix to cover it, and provide a materials total with optional tax.
How It Works
- Room mode: wall area =
2 × (Length + Width) × Height − doors − windows, plusLength × Widthif you include the ceiling. - Direct area: enter total paintable m²/ft² (optionally including ceilings).
- Volume:
(area × coats) ÷ coverage, then add your overage for touch-ups and roller tray losses. - Can mix: we propose large cans first and top-up with smaller sizes to cover the total; cost is based on the prices you enter.
Coverage Tips
- Smooth, previously painted walls: 10–12 m²/L (≈ 350–400 ft²/gal).
- Raw drywall or porous surfaces may need a primer coat and lower coverage.
- Dramatic color changes usually need an extra coat or a tinted primer.
More Handy Calculators
- Paint Coverage Calculator – work out litres/gal from room size.
- Wallpaper Calculator – estimate rolls for walls with doors/windows.
- Stud / Framing Calculator – plan wall framing before lining.