Paint Calculator
Paint quantity needed
Paint Calculator
Estimate paint quantity for your room
Paint Estimate
About Paint Calculator
The Paint Calculator helps you estimate the exact quantity of paint needed for your room. Whether you're painting walls, ceilings, doors, or windows, our calculator provides accurate estimates for your home renovation project.
Save money by buying the right amount of paint — no more, no less. Includes calculations for doors, windows, multiple coats, and different paint types (wall paint, primer, enamel).
How to Use This Paint Calculator
Step 1: Enter room dimensions — length, width, and height in feet.
Step 2: Enter number of doors and windows to subtract from wall area.
Step 3: Select paint type (Wall Paint, Primer, or Enamel) and number of coats.
Step 4: (Optional) Check "Include Ceiling" to include ceiling area.
Step 5: (Optional) Enter price per liter for cost estimation.
Step 6: Click "Calculate Paint" to see results.
Step 7: Use the Reset button to clear all inputs and calculate a different room.
Why Use a Paint Calculator?
✓ Save Money
Buy exactly what you need. No extra paint sitting unused. Save 10-30% on painting costs by buying the right quantity.
✓ Avoid Shortages
Running out of paint mid-project is frustrating. Our calculator ensures you have enough with proper waste allowance.
✓ Budget Planning
Get accurate cost estimates before starting your painting project. Plan your renovation budget effectively.
✓ Multiple Surfaces
Calculate paint for walls, ceilings, doors, and windows. Handle complex rooms with multiple openings.
Paint Coverage Guide
| Paint Type | Coverage (sq ft/L) | Best For |
|---|---|---|
| Wall Paint | 100-120 | Interior/Exterior walls |
| Primer | 120-140 | Base coat before painting |
| Enamel | 90-110 | Wood, metal surfaces |
Painting Tips for Best Results
- 🎨Clean walls before painting: Remove dust, grease, and cobwebs. Use mild detergent solution for best adhesion.
- 🎨Use primer first: Primer seals porous surfaces, reduces paint absorption, and improves coverage. Essential for new drywall.
- 🎨Stir paint thoroughly: Mix paint before and during application. Use a stir stick for 2-3 minutes for consistent color.
- 🎨Apply thin coats: Two thin coats are better than one thick coat. Thin coats dry faster, level better, and prevent drips.
Paint Quantity Formula
Paint Needed (liters) = (Total Area × Coats) ÷ Coverage per Liter
Where: Total Area = Wall Area + Ceiling Area - Door Area - Window Area
Example: Room 12×10×8 ft, 2 doors, 2 windows, 2 coats = (2(12+10)×8 + 120 - 40 - 30) × 2 ÷ 110 = 412 × 2 ÷ 110 = 7.5 liters → 8 liters
About Paint Calculator
Estimate how much paint you need for your room. Includes walls, ceiling, doors, windows, and multiple coats. Perfect for home renovation and painting projects.