Paint Calculator

A gallon of paint covers about 350-400 sqft. A typical 12x12 room with 8ft ceilings needs about 1.5 gallons for one coat or 3 gallons for two coats.

Use primer when painting over dark colors, new drywall, stains, or switching between paint types. Self-priming paints can skip this step for minor color changes.

Most colors need 2 coats for full coverage. Light over dark or dark over light may need 3 coats. Quality paints with high pigment may only need 1 coat.

The Paint Calculator is an online tool that lets you calculate paint needed for rooms with coverage estimates and cost breakdown. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Using the Paint Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. Follow the controls on the page. Some functions require sign-in or a paid plan; see Pricing for limits.

The Free plan includes 10 tool uses per day. Some features require an account or a paid plan. Check the controls on the tool page and Pricing for the applicable limits.

The Paint Calculator returns results based on the inputs and the tool methodology. Check assumptions, units and source dates. Treat projections as estimates. For critical decisions, always consult a qualified professional.

Yes, the Paint Calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers. Simply open NexTool in your mobile browser and navigate to the tool — no app download required.