Remodeling calculators
4 calculators for the arithmetic that comes between a design idea and a budget: what a room costs by square footage, how much paint it needs, and how much flooring or tile to order once waste is counted. All of them run on your device.
Remodel cost calculator
Room type, square footage and finish level into a budget range, with the low and high ends shown separately because the spread is the useful part.
Paint calculator
How many gallons a room needs, counting coats, ceiling and the doors and windows you are not painting.
Flooring calculator
Square footage plus the waste factor that every flooring type needs, which is the number most estimates get wrong.
Tile calculator
Tile count for a floor or a backsplash, including cuts, and why a diagonal layout changes the order quantity.
How these work
They are static pages with a few lines of arithmetic attached. Nothing you type is transmitted, stored or logged, because there is no server behind them to receive it — you can confirm that by opening your browser's network panel and watching nothing happen while you type.
Every calculator prints the formula it uses and the rates it multiplies by, so the output can be checked rather than trusted. Where a rate comes from published data it says whose, and where it is a working rule extended beyond the published figure it says that instead.
What a calculator cannot do
None of these is a quote, and the gap is not small. Permits, disposal, structural work, moving plumbing and everything discovered after a wall comes open are excluded by construction, because square footage cannot predict them. HomeAdvisor puts kitchen permits alone at $460 to $2,770 and bathroom demolition at $1,000 to $2,300, and neither appears in any number here.
Use these to find out whether a project is a $5,000 conversation or a $50,000 one. Use a contractor who has stood in the room to find out what it actually costs. The cost guides — kitchen, bathroom and interior painting — cover what sits behind each number.