PAINT COVERAGE CALCULATOR
Paint Calculator
Enter your wall dimensions to estimate total surface area, gallons needed, and coat coverage.
Related Painting Tools
Wall Area Tool
Ceiling & Trim Tool
Exterior Estimator
Primer Volume Tool
Stain & Seal Tool
Recommended Painting Tools & Supplies
Airless Paint Sprayer
Achieve a smooth, factory-like finish on walls and ceilings in a fraction of the time compared to traditional rollers.
Paint Roller Kit
Heavy-duty kit with high-nap rollers designed for superior paint pick-up and consistent interior wall texture.
Paint Brushes Set
Hand-crafted brushes with precise tipping for sharp cut-ins and professional results on trim and detailed moldings.
Painter’s Tape
Advanced adhesive technology prevents paint bleed on edges, ensuring crisp lines even on semi-textured surfaces.
Drop Cloth Protection
Premium canvas protection that absorbs spills and prevents tracking wet paint across freshly finished floors.
Extension Pole
Lightweight, adjustable pole that anchors securely to rollers for steady reach on high ceilings and tall foyers.
Mixing Drill Attachment
Industrial mixer for your cordless drill that eliminates settling pigments and saves time on multi-gallon project prep.
Can Opener Multi-Tool
Durable multi-tool for puncturing seals, opening cans, and cleaning rollers, built for repetitive daily contractor use.
Expert Painting Estimates
Wall Surface
Calculate precise square footage for interior walls and rooms to ensure you purchase the perfect volume of paint cans.
Ceilings & High Walls
Determine the required gallons for overhead surfaces and high-reach areas, accounting for texture and absorbent materials.
Trim & Millwork
Plan detail work by estimating necessary linear footage and paint volume for baseboards, door frames, and moldings.
Exterior Siding Jobs
Check exterior surface area against weather-resistant coating standards for optimal protection and long-lasting durability.
Paint Calculator FAQ
HOW MANY GALLONS DO I NEED PER SQUARE FOOT?
On average, one gallon of paint covers about 350 to 400 square feet. This varies based on surface porosity and application method. For rougher textures or dramatic color changes, you should plan for lower coverage and order more material.
WHY SHOULD I CALCULATE FOR TWO COATS OF PAINT?
Two coats ensure uniform color depth and a professional finish. While some paints claim one-coat coverage, a second layer provides better durability and hides imperfections. Multiply your initial surface area by two for an accurate estimate.
HOW DO I ESTIMATE PAINT FOR WINDOWS AND DOORS?
Subtract approximately 15 square feet for each standard window and 21 square feet for each door from your total wall area. This prevents overbuying paint and ensures you only pay for the material actually applied to your wall surfaces.
ACCURACY DISCLAIMER
These figures are for estimation and planning purposes only. They do not constitute a formal contract. Always consult with a professional painter or check specific product labels for exact spread rates and environmental application requirements.
Common Paint Applications
Estimating gallons for a Master Suite rehab
Calculating primer for a dark wall change
Planning exterior trim and siding updates
Budgeting for whole-house interior painting projects
Paint Estimator
01
Paint Estimator
Enter your room dimensions to estimate wall area, gallons needed, and waste factor.
02
Paint Estimate
Review your calculated paint details including area, gallon coverage, and cans needed for your project.
How the Paint Estimator Works
01
Select Paint Type
Choose between Interior, Exterior, or Primer to match your specific renovation requirements.
02
Enter Width & Height
Input the wall width, ceiling height, and quantity of coats in your preferred units for volume calculation.
03
Review Paint Outputs
Instantly review your total gallons, surface area, and drying time alongside coating recommendations.
Get the Full PAINT COATING Â Calculator App
Access advanced finishing estimation tools for accurate and efficient planning. Our professional-grade mobile app allows you to perform complex paint calculations directly on the jobsite.
Take the full calculator with you to the jobsite and unlock powerful estimating tools.