Construction Calculators
Square footage, concrete, paint, flooring, mulch, and wallpaper — free, fast, and no sign-up required.
Square Footage Calculator
Area for rectangular, triangular, or circular rooms from L × W or radius.
Open tool →Concrete Calculator
Cubic yards or bags of concrete for slabs, footings, and pads.
Open tool →Paint Calculator
Gallons of paint for walls, ceilings, and trim — accounts for doors and windows.
Open tool →Flooring Calculator
Square feet and number of boxes for hardwood, laminate, vinyl, or tile.
Open tool →Mulch Calculator
Cubic yards or 2-cu-ft bags for any garden bed or landscape area.
Open tool →Wallpaper Calculator
Rolls needed for any room based on wall dimensions and pattern repeat.
Open tool →BTU / HVAC Sizing Calculator
Right-sized AC or heater capacity for any room from sqft and climate.
Open tool →Stair Calculator
Riser height, tread depth, total run, and stringer length from total rise.
Open tool →Roof Pitch Calculator
Convert between roof pitch, angle in degrees, and slope percentage.
Open tool →Gravel Calculator
Cubic yards or tons of gravel for driveways, paths, and landscape projects.
Open tool →Fence Calculator
Posts, rails, and pickets for any fence length and post spacing.
Open tool →