Construction & Home

Calculate the area of a room or surface in square feet or square meters. Supports rectangle, triangle, and circle shapes.

Calculate how much paint you need for a room. Accounts for wall area, coats, doors, windows, and typical 350 sq ft/gallon coverage.

Calculate how many tiles you need for a floor or wall, including a waste allowance for cuts and breakage.

Estimate the BTU rating needed to cool or heat a room based on size, insulation, climate, and sun exposure.

Calculate concrete volume for slabs, footings, columns, and pads in cubic yards and cubic meters, with bag-mix equivalents.

Calculate board feet for any quantity of lumber. Useful for hardwood pricing, framing estimates, and project cost-out.

Calculate cubic yards and bags of mulch, soil, or gravel needed for a garden bed at your chosen depth.

Calculate how many drywall sheets you need for walls and ceilings, including waste and screw count.

Convert between roof pitch (rise/run), angle in degrees, and slope percentage. Useful for roofing, siding, and accessibility.

Calculate the number of stairs, individual rise, run, and stringer length for any total height.

Calculate how many bags of fertilizer you need for a lawn at the recommended nitrogen rate (typically 1 lb N per 1,000 sq ft).

Calculate carpet area needed in square yards, including waste, plus padding and total installed cost.

Calculate the number of fence posts, panels, and bags of concrete needed for a fence run, plus total material cost.

Calculate gravel volume and tonnage for driveways, patios, and drainage projects.

Calculate wallpaper rolls needed based on room dimensions, openings, and pattern repeat.

Calculate hot-mix asphalt tonnage needed for driveways, parking lots, and small paving jobs.

Calculate how many deck boards you need based on area, board size, and gap spacing.

Calculate baseboard or crown molding linear feet from room perimeter, minus openings.

Calculate the number of bricks or concrete blocks needed for a wall, with mortar allowance.

Calculate insulation R-value needed and number of batts required for an area.

Calculate roofing shingle squares and bundles needed from roof area and pitch.