Paint Calculator & Estimator

How much paint do I need? Never buy too much or too little paint again. This paint calculator tells you exactly how many gallons of paint to buy for any room, with accurate coverage calculations.

PAINT CALCULATOR: QUICK ESTIMATE Know your wall area in square feet? Enter it directly into the paint calculator and get your paint quantity in seconds. Perfect for quick estimates at the paint store when you need to know how much paint to buy.

ROOM PAINT CALCULATOR: PRECISE RESULTS Enter room dimensions including length, width, and height or perimeter. The room paint calculator automatically deducts doors and windows with simple counters. Choose from 6 paint types and 6 surface types. Select 1 to 3 coats for accurate paint coverage calculation. All coverage rates based on manufacturer specifications.

MULTI-ROOM PAINT CALCULATOR (Premium) Add unlimited rooms to a painting project. Each room has independent paint type, surface, and coat settings. Project summary shows total paint needed across all rooms. Name your projects for easy organization.

CEILING AND TRIM CALCULATORS (Premium) Toggle ceiling painting on or off with separate paint type selection. Add baseboard and trim with linear footage and width. Separate paint coverage calculations for each surface type.

PAINTING COST ESTIMATOR (Premium) Enter paint price per gallon or liter for accurate cost estimates. Add labor costs with hourly rate and hours. Add supply costs for tape, rollers, and brushes. Get a full painting project cost breakdown showing exactly what your job will cost.

PAINT SHOPPING LIST (Premium) Consolidated shopping list grouped by paint type. Quantities rounded to nearest purchasable size so you know exactly how many gallons to buy. Check items off as you shop. Share your paint shopping list via text or email.

SMART PAINT CALCULATOR FEATURES Switch between Imperial (feet and gallons) or Metric (meters and liters) units. A 10 percent touch-up buffer is automatically included in every calculation. Clear purchase recommendations tell you exactly what to buy. Purchase breakdown shows combinations like 1x 5-gallon bucket plus 2x gallon cans. Light and dark mode. Clean professional interface.

THE UNLOCK ADDS Multi-room paint calculator, painting cost estimator, shopping list with sharing, ceiling and trim calculators, and no ads. The standard tier includes the full single-room paint calculator with all paint types, surfaces, and coverage calculations.

Paint calculations for DIY painters, professional contractors, and real estate flippers. Estimate with confidence.