Construction Estimators
Bricks, blocks, concrete mix, rebar, plaster, roofing, drywall, stairs, gravel, asphalt, decks, fences, insulation and building cost estimates.
- 10 mm Steel Bar Weight per MetreA 10 mm TMT / rebar weighs 0.617 kg per metre (D²/162) — 7.41 kg per 12 m bar. Calculate total weight for any length.
- 12 mm Steel Bar Weight per MetreA 12 mm TMT / rebar weighs 0.889 kg per metre (D²/162) — 10.67 kg per 12 m bar. Calculate total weight for any length.
- 16 mm Steel Bar Weight per MetreA 16 mm TMT / rebar weighs 1.580 kg per metre (D²/162) — 18.96 kg per 12 m bar. Calculate total weight for any length.
- 20 mm Steel Bar Weight per MetreA 20 mm TMT / rebar weighs 2.469 kg per metre (D²/162) — 29.63 kg per 12 m bar. Calculate total weight for any length.
- 25 mm Steel Bar Weight per MetreA 25 mm TMT / rebar weighs 3.858 kg per metre (D²/162) — 46.30 kg per 12 m bar. Calculate total weight for any length.
- 8 mm Steel Bar Weight per MetreA 8 mm TMT / rebar weighs 0.395 kg per metre (D²/162) — 4.74 kg per 12 m bar. Calculate total weight for any length.
- Asphalt CalculatorCalculate tons of asphalt for a driveway or parking area from size and compacted thickness, and estimate material cost.
- Concrete Block CalculatorCount concrete blocks (CMU 8×8×16, UK 440×215, AAC 600×200) for a wall from its area, with mortar and waste allowance.
- Board Foot CalculatorCalculate board feet for lumber (thickness × width × length ÷ 12) and total cost at your price per board foot.
- Brick CalculatorCalculate bricks, mortar, cement bags and sand for any wall size with India, US and UK brick sizes, wall thickness, openings and waste.
- How Many Bricks for a 10 × 3 m Wall?A 10 × 3 m half-brick wall needs about 1,575 modular bricks (incl. 5% waste) and 2.1 bags of cement in 1:6 mortar.
- How Many Bricks for a 3 × 3 m Wall?A 3 × 3 m half-brick wall needs about 473 modular bricks (incl. 5% waste) and 0.6 bags of cement in 1:6 mortar.
- How Many Bricks for a 4 × 3 m Wall?A 4 × 3 m half-brick wall needs about 630 modular bricks (incl. 5% waste) and 0.9 bags of cement in 1:6 mortar.
- How Many Bricks for a 5 × 3 m Wall?A 5 × 3 m half-brick wall needs about 788 modular bricks (incl. 5% waste) and 1.1 bags of cement in 1:6 mortar.
- Concrete Mix CalculatorCalculate cement bags, sand, coarse aggregate and water for M10, M15, M20 and M25 nominal concrete mixes from the wet volume.
- Construction Cost CalculatorEstimate building cost from built-up area, local per-area rate, finish quality, fees and contingency, with a package-wise split.
- Deck CalculatorEstimate deck boards, joists and screws for any deck size, board width, gap and joist spacing.
- Drywall CalculatorEstimate drywall sheets (4×8, 4×10, 4×12), screws and joint tape for a room’s walls and ceiling, minus openings.
- Fence CalculatorCalculate fence posts, rails, pickets and concrete bags for any fence length, post spacing and gates.
- Gravel CalculatorCalculate gravel for a driveway, path or base in cubic yards, tons and bags from length, width and depth.
- Insulation R-Value CalculatorFind the recommended attic R-value for your IECC climate zone and how many inches of batts, blown cellulose or spray foam to add.
- M15 Concrete Mix QuantitiesM15 nominal mix needs 6.3 bags (50 kg) of cement, 0.44 m³ (15.5 ft³) sand and 0.88 m³ (31.1 ft³) aggregate per cubic metre of concrete.
- M20 Concrete Mix QuantitiesM20 nominal mix needs 8.1 bags (50 kg) of cement, 0.42 m³ (14.8 ft³) sand and 0.84 m³ (29.7 ft³) aggregate per cubic metre of concrete.
- M25 Concrete Mix QuantitiesM25 nominal mix needs 11.1 bags (50 kg) of cement, 0.385 m³ (13.6 ft³) sand and 0.77 m³ (27.2 ft³) aggregate per cubic metre of concrete.
- Plaster CalculatorCalculate cement bags and sand for wall plastering by area, thickness (6–20 mm) and mix ratio (1:3 to 1:6).
- Slab Rebar CalculatorEstimate reinforcement for a slab: number of bars each way, total length and steel weight from size, spacing, cover and bar diameter.
- Roofing CalculatorCalculate roof area from the footprint and pitch, then roofing squares, shingle bundles and underlayment rolls with waste.
- Roofing Materials for a 30×20 HouseA 30 × 20 ft house with a 6/12 pitch and 12 in overhang needs about 8.7 roofing squares — 26 bundles of shingles.
- Roofing Materials for a 40×30 HouseA 40 × 30 ft house with a 6/12 pitch and 12 in overhang needs about 16.5 roofing squares — 50 bundles of shingles.
- Roofing Materials for a 50×30 HouseA 50 × 30 ft house with a 6/12 pitch and 12 in overhang needs about 20.5 roofing squares — 62 bundles of shingles.
- Roofing Materials for a 60×40 HouseA 60 × 40 ft house with a 6/12 pitch and 12 in overhang needs about 32 roofing squares — 97 bundles of shingles.
- Stair CalculatorCalculate the number of steps, riser height, tread run, stringer length and angle for a staircase, checked against IRC limits.
- Stair Layout for a 108 in RiseA 108-inch floor-to-floor rise needs 14 risers · 13 treads — Riser 7.714 in · total run 130 in (10.83 ft). Within IRC limits.
- Stair Layout for a 120 in RiseA 120-inch floor-to-floor rise needs 16 risers · 15 treads — Riser 7.5 in · total run 150 in (12.5 ft). Within IRC limits.
- Stair Layout for a 132 in RiseA 132-inch floor-to-floor rise needs 18 risers · 17 treads — Riser 7.333 in · total run 170 in (14.17 ft). Within IRC limits.
- Stair Layout for a 96 in RiseA 96-inch floor-to-floor rise needs 13 risers · 12 treads — Riser 7.385 in · total run 120 in (10 ft). Within IRC limits.
- Steel Bar Weight CalculatorCalculate TMT / rebar weight per metre and total weight with the D²/162 formula for 6–32 mm bars. Includes a unit-weight table.