🎨 Wall Paint Calculator
Calculate exact paint required for your room or house. Estimate total liters, coverage area, and project cost including coats and wastage.
📏 Room Dimensions
Wall height in feet
Wall width in feet
Subtract area of doors, windows, openings
New walls: 2-3 coats | Repaint: 1-2 coats
Enter to estimate total cost
Coverage Assumption: 1 liter covers ~100 sq ft per coat
Tip: Add 10-15% extra for touch-ups and wastage
Estimated Paint Required
0
LitresArea Breakdown
Paint Coverage Details
Coverage Rate
100 sq ft/litre
Per coat
Number of Coats
2
Selected
Total Coverage
0 sq ft
Paintable area × coats
Recommended Extra
0 Litres
10% for touch-ups
Paint Type Coverage Guide
| Paint Type | Coverage (sq ft/litre) | Coats Recommended |
|---|---|---|
| Emulsion Paint | 130-150 | 2 |
| Enamel Paint | 110-130 | 2 |
| Primer | 120-140 | 1 |
| Calculator Default | 100 | 2 |
Note: Actual coverage varies by surface texture, paint quality, and application method.
🎨 How to Calculate Paint Quantity?
Calculating paint quantity manually is simple. First, determine the total surface area by multiplying height and width. Then subtract the area of doors and windows. Finally, divide the result by the paint coverage rate (usually 100 sq ft per liter for two coats).
📐 Formula Used
Total Area = (Height × Width) - Non-Paint Area
Litres Needed = (Total Area × Number of Coats) / Coverage per Litre
📊 Paint Coverage Guide
- Emulsion Paint: Covers approx. 130-150 sq ft per liter (1 coat).
- Enamel Paint: Covers approx. 110-130 sq ft per liter.
- Primer: Covers approx. 120-140 sq ft per liter.
- Note: We assume an average coverage of 100 sq ft per liter for a safe estimate (double coat).
💡 Pro Tips for Paint Estimation
- Always add 10-15% extra for touch-ups and wastage
- Buy all paint from same batch to avoid color variation
- Quality paint covers better and lasts longer
- Consider primer for new walls or dark to light color changes
💰 Cost Saving Tips
- Buy in bulk (5L or 10L cans) for better price per liter
- Compare prices across brands before purchasing
- Look for seasonal discounts and offers
- Consider DIY painting to save labor costs
❓ Frequently Asked Questions
How many coats of paint are necessary?
For repainting the same color, 1 coat might suffice. For new walls or changing colors (dark to light), 2-3 coats are recommended for a smooth finish. Primer is recommended for new walls.
Should I buy extra paint?
Yes, it's wise to buy 10-15% extra paint for touch-ups and spills. Paint batches can vary slightly in color, so having extra ensures consistency for future touch-ups. Our calculator recommends extra quantity automatically.
How do I calculate paint for multiple walls?
Calculate each wall separately and sum the areas. For a rectangular room, total wall area = 2 × (Length + Width) × Height. Our calculator assumes a single wall - for full room, use this formula or calculate multiple times.
What affects paint coverage?
Surface texture (smooth vs rough), paint quality, application method (brush vs roller), and color change intensity all affect coverage. Rough surfaces absorb more paint, requiring up to 20% more quantity.
⚠️ Disclaimer: This calculator provides estimates based on standard coverage rates. Actual paint requirements may vary based on surface condition, application method, and paint quality. Always consult with a professional painter for accurate estimates.