Construction & DIY

22 calculators: concrete (slab + column + cement/sand/aggregate by mix ratio), mortar/plaster, brick + block counting, tile + flooring + carpet + wallpaper estimation, paint coverage, roofing + roof pitch, drywall, lumber (board feet), stud-wall framing, rebar, stairs, mulch/topsoil, gravel (volume + weight), fencing, and pool volume.

We use IS-456 (concrete) mix ratios — M15 (1:2:4), M20 (1:1.5:3), M25 (1:1:2). Brick math assumes standard 230×110×75 mm modular brick. For project-grade quotes, always confirm with your contractor's site measurements.

Use the Concrete Slab calculator → multiplies volume × 6.4 bags/m³ (M20). Round up. The Cement / Sand / Aggregate calculator gives precise totals for any mix and shows separate quantities for cement, sand, and aggregate.

Default is 10% — covers cuts at edges, breakage, and pattern alignment. For complex layouts (herringbone, intricate borders), bump to 15%. Paint coverage is ~10 m²/L for typical interior walls per coat.

Steps = total rise ÷ riser height (round up). Tread depth = total run ÷ steps. Indian Building Code recommends riser 150–175 mm and tread 250–300 mm. The calculator validates the riser height and warns if it's outside the safe range.

The pool calculator supports rectangular and round shapes. For free-form / kidney pools, approximate as a rectangle with the equivalent surface area. Output is in m³ and litres — enough to size the heater and pump.