Paint Calculator
Calculate paint quantity needed for walls and ceilings.
Paint Calculator
About This Tool
Professional Paint Calculator - Accurate Paint Quantity Estimation
Our professional paint calculator helps you determine exactly how much paint you need for any interior or exterior painting project. Whether you're planning to refresh a single room or tackle your entire home, accurate paint calculations save you time, money, and multiple trips to the store.
How to Use the Paint Calculator
- Measure Your Room: Enter the room length, width, and height in feet
- Count Openings: Include the number of doors and windows to subtract from total area
- Choose Options: Select whether you're painting the ceiling and how many coats you need
- Set Coverage Rate: Use 350 sq ft per gallon for most quality paints, or check your paint can label
- Add Waste Factor: Include extra paint for touch-ups and application waste
Paint Coverage Guidelines
- Premium Paints: 400-450 sq ft per gallon
- Standard Quality: 350-400 sq ft per gallon
- Budget Paints: 250-350 sq ft per gallon
- Primer: 200-300 sq ft per gallon
Professional Tips for Paint Calculation
Standard Door Size: 20 square feet
Standard Window Size: 15 square feet
Waste Factor: Always add 10-15% extra for touch-ups and waste
Related Paint Products
Once you know how much paint you need, explore our extensive selection of premium paints and coatings. We carry:
- Interior Paint - High-quality interior paints in all finishes
- Exterior Paint - Weather-resistant exterior coatings
- SHERWIN-WILLIAMS Paint - America's most trusted paint brand
- Paint Tools & Supplies - Professional brushes, rollers, and accessories
Additional Painting Tools
Complete your painting project planning with these helpful tools:
- Area Calculator - Calculate room areas for any shape
- Trim Calculator - Estimate trim paint quantities
- Ceiling Calculator - Specialized ceiling paint calculations
- Material Cost Tracker - Track your painting project costs
Paint Finish Selection Guide
Flat/Matte: Best for ceilings and low-traffic areas
Eggshell: Ideal for living rooms and bedrooms
Satin: Great for kitchens, bathrooms, and high-traffic areas
Semi-Gloss: Perfect for trim, doors, and moisture-prone areas
Gloss: Excellent for doors, trim, and areas requiring frequent cleaning
How to Use
Enter your room dimensions, count doors and windows, select coating options, and choose your waste factor. The calculator will determine exact paint quantities needed, including primer if required.
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