Painting Cost Calculator
Calculate interior or exterior painting costs from area, paint quality, and labor rate. Enter values for instant results with step-by-step formulas.
Formula
Total Cost = (Paint + Supplies + Prep Materials) x Type Multiplier + (Labor Hours x Rate)
Painting costs include material costs (paint at coverage of 350-400 sqft/gallon per coat, supplies at $0.15/sqft, and prep materials) multiplied by a type factor (1.4x for exterior), plus labor costs calculated from estimated hours at the given rate. Exterior projects take approximately 40% longer due to prep and safety requirements.
Worked Examples
Example 1: Interior Living Room Painting
Problem: Paint 1,500 sq ft of interior walls with mid-grade paint, 2 coats, moderate prep, at $35/hr labor rate.
Solution: Paint needed: 1,500 / 350 = ~5 gallons per coat x 2 = 10 gallons\nPaint cost: 10 x $45 = $450\nSupplies: $225 | Prep materials: $375\nTotal materials: $1,050\nLabor hours: ~30 hours\nLabor cost: 30 x $35 = $1,050\nTotal: $2,100
Result: Total Cost: ~$2,100 | 10 gallons | $1.40/sqft | ~4 days
Frequently Asked Questions
How much does it cost to paint a house interior?
Interior painting typically costs $1.50-$4.00 per square foot of wall area, including labor and materials. For an average 2,000 sq ft home with approximately 5,000 sq ft of wall area, expect to pay $7,500-$20,000 for professional painting. DIY painting reduces costs to $0.50-$1.50 per square foot (materials only). Costs vary based on paint quality, number of coats, prep work needed, ceiling height, and trim complexity. Most professional painters charge $25-$50 per hour or quote per room.
Is exterior painting more expensive than interior?
Yes, exterior painting typically costs 30-50% more than interior painting due to: higher-grade weather-resistant paint ($40-$80/gallon vs $25-$70), more extensive surface preparation (scraping, power washing, caulking), safety equipment for heights, weather-dependent scheduling, and primer requirements. Exterior paint must withstand UV, rain, temperature extremes, and mildew. Professional exterior painting runs $2.50-$6.00 per square foot including prep, while interior runs $1.50-$4.00.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
Is Painting Cost Calculator free to use?
Yes, completely free with no sign-up required. All calculators on NovaCalculator are free to use without registration, subscription, or payment.
Can I use Painting Cost Calculator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
Does Painting Cost Calculator work offline?
Once the page is loaded, the calculation logic runs entirely in your browser. If you have already opened the page, most calculators will continue to work even if your internet connection is lost, since no server requests are needed for computation.