Painting Cost Calculator
Estimate total painting cost - DIY vs professional
Length of the room
Width of the room
Height of walls
Affects per-gallon price
Wall Area
—
sq ft
Paint Needed
—
gallons
DIY Cost
—
USD
Professional Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Our calculator estimates both DIY and professional costs so you can make an informed decision.
- Measure room dimensions
- Select paint quality
- Use the calculator
- Compare DIY vs professional costs
Expert Insights
Smart analysis for your Painting project
Paint Quality ROI
Premium paint ($50+/gal) covers 20-30% more area per gallon and lasts 7-10 years vs 3-5 for budget. AI calculates true cost-per-year.
Primer Optimization
Painting over dark colors or bare drywall? AI recommends primer to save up to one full coat of paint — cutting project cost by 20-30%.
Labor vs DIY Comparison
Professional painters average 2-3x faster. AI compares your room size against national labor rates for an accurate DIY savings estimate.
Calculation Formula
Wall area = 2 x (L + W) x H
Gallons = Wall area x 2 coats / 350
DIY = Gallons x Price + $75 supplies
Pro = Wall area x $2.50/sqft
Paint Quality Comparison
| Quality Tier | Price/Gallon | Coverage/Gallon | Lifespan | Best For |
|---|---|---|---|---|
| Economy | $15-25 | 250-300 sq ft | 2-4 years | Rental touch-ups |
| Standard | $30-45 | 300-400 sq ft | 5-7 years | Most interior walls |
| Premium | $50-80 | 350-450 sq ft | 7-10+ years | High-traffic, exteriors |
Authority References
Our calculations are based on guidelines and standards from these authoritative sources:
- Paint Quality Institute — Coverage Rates & Application Guidelines. Learn more
- Sherwin-Williams — Paint Calculator & Coverage Charts. Learn more
- Benjamin Moore — Painting Best Practices Guide. Learn more
Frequently Asked Questions
How much does it cost to paint a room professionally?
Professional painting costs $1.50-$3.50 per square foot. A standard 12x10 room costs $380-$790.
Is it cheaper to paint yourself?
DIY costs $100-$250 for a 12x10 room. That is 50-70% less than hiring a pro.