Paint Calculator

Calculate paint coverage, estimate costs, and plan your painting project

Project Type

Project Details

Paint Settings

Paint Calculation Results

Area Breakdown

Total Wall Area: 396 sq ft
Doors & Windows: -80 sq ft
Ceiling Area: 0 sq ft
Paintable Area: 316 sq ft

Paint Requirements

Paint Needed: 1.8 gallons
With 15% Buffer: 2.1 gallons
Recommended Purchase: 3 gallons

Cost Estimation

Paint Cost: $135.00
Cost per Sq Ft: $0.43

Additional Supplies Needed

• Primer (if needed): 1-2 gallons
• Brushes & Rollers
• Drop cloths & Tape
• Paint trays & Liners

When to Use Paint Calculator

Home Renovation

Planning interior room painting projects and estimating paint requirements for multiple rooms during home renovations.

Exterior House Painting

Calculating paint coverage for exterior walls, siding, and trim to ensure adequate paint purchase for complete house coverage.

Professional Contractors

Providing accurate paint estimates to clients and calculating material costs for painting contracts and project bids.

Budget Planning

Estimating paint costs for home improvement budgets and comparing different paint options based on coverage and price.

DIY Projects

Helping DIY enthusiasts calculate paint requirements for furniture, crafts, and small painting projects with accurate measurements.

Property Management

Managing paint inventory and calculating requirements for multiple rental properties and maintenance schedules.

Frequently Asked Questions

How much paint do I need for a room?

To calculate paint needed for a room, measure the wall area (length × height), subtract doors and windows, then divide by paint coverage (typically 350-400 sq ft per gallon). Our paint calculator does this automatically for accurate estimates.

How do I calculate paint coverage?

Paint coverage is calculated by dividing the total paintable area by the coverage rate of your paint (usually 350-400 sq ft per gallon). Factor in the number of coats needed for complete coverage.

What factors affect paint coverage?

Paint coverage is affected by surface texture, paint quality, application method, primer use, and color changes. Textured surfaces and dark-to-light color changes typically require more paint.

Should I buy extra paint?

Yes, it's recommended to buy 10-20% extra paint for touch-ups, waste during application, and potential color matching issues in the future. Our calculator includes this buffer automatically.

How much does paint cost per gallon?

Paint costs vary from $25-60 per gallon for interior paint and $30-80 for exterior paint, depending on quality and brand. Premium paints offer better coverage and durability.

Is this paint calculator accurate?

Our paint calculator uses industry-standard coverage rates and includes factors like multiple coats and waste allowance. Results are estimates - actual needs may vary based on surface conditions and application method.

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