Exterior Paint Calculator
Calculate how much exterior paint you need for your home. Estimate gallons needed based on surface area, number of coats, and paint coverage per gallon.
Step 1: Surface Measurements
Paint Calculation Formula
Gallons Needed = (Surface Area × Number of Coats) ÷ Coverage per Gallon
Always add 10-15% extra for waste, touch-ups, and complex surfaces.
Step 2: Paint Options
Coverage Guidelines
Economy Paint: 200-250 sq. ft./gallon
Standard Paint: 250-300 sq. ft./gallon
Premium Paint: 300-350 sq. ft./gallon
High-End Paint: 350-400+ sq. ft./gallon
Paint Calculation Results
Total Paint Needed
Paint Type Comparison
| Paint Type | Coverage (sq. ft./gal) | Avg. Price/Gal | Durability |
|---|
Paint Calculation Formula
Basic Formula: Gallons = (Area × Coats) ÷ Coverage
Where:
• Area = Total surface area in square feet
• Coats = Number of paint coats needed
• Coverage = Square feet covered per gallon of paint
Always add 10-20% extra for:
• Waste and spillage
• Complex surfaces (textured, porous)
• Touch-ups and future repairs
Painting Tips
Professional Painting Tips
1. Always clean and prep surfaces before painting
2. Use primer on bare wood, metal, or stained surfaces
3. Check weather conditions – ideal temperature is 50-85°F
4. Buy all paint from the same batch for color consistency
5. Use high-quality brushes and rollers for better coverage
6. Paint from top to bottom and work in sections
7. Allow proper drying time between coats
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