Construction & Building calculators
20 free toolsConcrete, cement, bricks, tiles, roofing and drywall calculators for builders, contractors and DIY home projects. Work in feet and inches or metres.
Concrete Slab CalculatorWork out how much ready-mix concrete to order for a slab, patio, driveway or shed base. Get cubic yards or cubic metres with waste included,Construction & BuildingAsphalt CalculatorEstimate how much asphalt you need for a driveway, path or parking area. Enter the size and compacted thickness to get US tons, metric tonneConstruction & BuildingBacksplash Tile CalculatorPlan a kitchen or bathroom backsplash. Add each wall section behind the counters, sink and range, subtract any windows, and choose the tile Construction & BuildingBrick CalculatorCount the bricks for any wall from its length and height, minus doors and windows. Choose Indian modular, traditional, UK or US modular bricConstruction & BuildingCement Sand Aggregate CalculatorFind how many cement bags and how much sand and aggregate (gitti) you need for any concrete grade from M5 to M25 or a custom ratio. Results Construction & BuildingConcrete Bag CalculatorFind out exactly how many bags of premixed concrete you need for a slab, footing, post holes or a column. Works with 40, 50, 60 and 80 lb baConstruction & Building
Concrete Block CalculatorCount the concrete blocks (cinder blocks, CMU) for a wall from its length and height. Works for US 8 × 16 in blocks and metric 400 × 200 mm,Construction & BuildingDeck CalculatorWork out how many deck boards, joists and screws you need for a new deck. Enter the deck size, board width and length, gap and joist spacingConstruction & BuildingDrywall CalculatorCount the drywall (plasterboard, gypsum board) sheets for a room or any wall area. Subtract doors and windows, include the ceiling if you neConstruction & BuildingExcavation CalculatorWork out how much soil comes out of a hole, trench, pond or foundation dig. The calculator adds soil swell for your soil type and tells you Construction & BuildingFence CalculatorPlan a wood or picket fence: enter the fence length, post spacing, corners and gates to get the number of posts, rails, pickets and bags of Construction & BuildingInsulation CalculatorPlan an insulation upgrade. Enter the area, your target R-value and any existing insulation, choose blown-in cellulose or fiberglass, batts,Construction & BuildingPaver CalculatorWork out how many pavers to buy for a patio, path or driveway, and how much gravel base and bedding sand to put under them. Enter the area, Construction & BuildingRebar CalculatorPlan the reinforcement grid for a concrete slab, patio or driveway. Enter the slab size, bar size and spacing to get the number of bars eachConstruction & BuildingRetaining Wall CalculatorWork out how many retaining wall blocks and caps you need, plus gravel for the base and drainage stone behind the wall. Enter the wall size Construction & BuildingRoof Pitch CalculatorFind a roof’s pitch from its rise and run, or convert between pitch (x in 12), angle in degrees and percent slope. Add the run to get the raConstruction & BuildingRoofing Shingles CalculatorFind how many bundles of shingles you need for a re-roof. Enter the house footprint and roof pitch (or the measured roof area), and get roofConstruction & BuildingStair Stringer CalculatorPlan a staircase from the total rise: get the number of risers, exact riser height, number of treads, total run, stringer length and stair aConstruction & BuildingTile CalculatorWork out how many floor or wall tiles to buy from the room size and tile size. The calculator includes grout joints, extra for cutting by laConstruction & BuildingTMT Steel Weight CalculatorFind the weight of TMT steel bars (sariya) from diameter, length and number of bars. Get kg per metre, kg per bar, total weight in kg and toConstruction & Building