Paint Calculator vs Paint It Right

How much paint do you need? Enter the room and get gallons for the job — not a guess. Paint Calculator estimates finish paint and primer from the room, openings, and the coverage on the can. Buy amounts are rounded up to whole gallons. • Length, width, and height in feet and inches • Paint walls, ceiling, or both • Subtracts 21 sq ft per door and 15 sq ft per window • Optional moulding from perimeter × width • Finish and primer coats, with coverage you can match to the label • Square-foot breakdown so you can see the math • Typical finish coverage 350 sq ft/gal; primer 250 — check the can and adjust Estimating tool only. Coverage depends on the paint, surface texture, and color change. Two finish coats is the usual job; set primer coats to 0 if you are not priming.

Painting a room and not sure how much paint to buy? Paint It Right turns your room measurements into a clear shopping answer: gallons of paint, primer, estimated cost, paintable square footage, and a practical supply checklist. PLAN THE WHOLE ROOM - Enter room length, width, and ceiling height - Subtract doors and windows - Choose the number of coats and coverage per gallon - Add primer when your project needs it - See estimated paint and primer cost SHOP WITH CONFIDENCE - Gallons always round up so you do not come up short - Get a ready-to-use supply checklist - Save projects and share your result - Reopen past projects without measuring again SIMPLE ON PURPOSE - No account and no sign-up - Fast, focused, and easy to use - Your calculations and saved projects stay on your phone The free version is supported by ads. A small one-time purchase removes advertising forever. Perfect for bedrooms, living rooms, offices, rentals, and weekend repainting projects.