Paint Calculator
Estimate gallons of paint for walls using room dimensions, doors, windows, coats, coverage and waste.
Open calculator →Calculator category
Paint & Walls calculators
Plan wall finishes, drywall, trim and insulation with practical buying quantities. Every tool exposes the assumptions that affect the result and links to the next useful calculation.
Wallpaper Calculator
Calculate wallpaper rolls from wall perimeter, height, roll width, roll length, pattern repeat and waste.
Open calculator →Drywall Calculator
Estimate drywall sheets for walls and ceilings, including openings and waste.
Open calculator →Baseboard Calculator
Estimate baseboard or trim length, piece count and waste from room perimeter and door openings.
Open calculator →Insulation Calculator
Estimate insulation area and package count for rectangular walls after subtracting openings.
Open calculator →How to use this calculator group
Start with the calculator closest to the material or task you are planning. Measure the project, replace default coverage or package values with the specification for the product you intend to buy, and then follow the related-tool links when another part of the project needs its own estimate.
Why these tools are grouped together
Related home projects share measurements, units and buying decisions. Keeping them in one topical hub makes it easier to move from area to quantity, from quantity to packages, and from one material to the next without repeating the same measurements.