ProjectMath

Home improvement math you can check. Every price on this site links to a source and shows the date we checked it. If we can't source a number, we don't print it.

Calculators

Shed cost
Size, build type, foundation Deck cost & materials
Installed cost, boards, joists Paint
Gallons for walls, any number of coats Concrete slab
Cubic yards, bags, cost Remodel cost
Low / mid / high tiers Drywall
Sheets and installed cost Fence cost
Per linear foot, by materialKitchen cabinet cost
Per linear foot, stock to customWindow replacement cost
Per window, by typeWater heater replacement cost
Tank, tankless, heat pumpSiding cost
Per sq ft of wall, by materialPaver patio cost
Per sq ft, DIY vs proGutter cost
Per linear foot, seamless vs seamedBathroom tile cost
Floor, shower, per sq ftGarage door replacement cost
By size and material Roof replacement
Squares with pitch, by material Room painting (pro)
Cost per room Insulation payback
Years to pay back Flooring cost
By type, with waste Heating cost per MMBtu
Heat pump vs gas vs wood

Guides (reviewed October 2026)

Last reviewed: 2026-10-14. Prices are national planning ranges; get local quotes.