Home & DIY
Paint, flooring, BTU, concrete, tile · 30 tools
Area 2
Construction 10
Baluster Calculator Balusters per railing section with code-legal spacing — the 4-inch sphere rule built in.
-> Brick Calculator Bricks for any wall from area and brick type, mortar joints included — modular to king, with waste.
-> Concrete Calculator Concrete for any slab: cubic metres, cubic yards, and 80 lb bag count from length, width, and thickness. m/ft toggles.
-> Deck Board Calculator Decking boards and screws for any deck size, board width, and gap — with the 10% waste rule.
-> Drywall Calculator Drywall sheet count from area, sheet size, and waste — 4×8 to 4×12, with tape and compound rules of thumb.
-> Fence Post Calculator Posts and panels for a straight fence run from length and spacing — m/ft toggles and setting-depth guidance.
-> Gravel Calculator Gravel, crushed stone, sand, or topsoil by volume and weight from area and depth — metric and US tons.
-> Roof Pitch Calculator Roof pitch in x-in-12, slope percent, and the rafter multiplier from any rise and run.
-> Stair Calculator Staircase layout from total rise: step count, equal riser height, comfort-rule tread depth, and total run.
-> Wall Stud Calculator Studs for any wall length at 12/16/24-inch spacing — the framing baseline before corners and openings.
-> Electrical 1
Materials 6
Asphalt Calculator Asphalt tons and cost from area and compacted depth — the 145 lb/ft³ hot-mix standard.
-> Board Foot Calculator Board feet from nominal dimensions and piece count, with cost — the lumberyard formula.
-> Epoxy Resin Calculator Epoxy needed for any pour plus the resin/hardener split at your mix ratio — river tables to flood coats.
-> Paint Calculator How much paint a room needs from wall area, coats, and coverage — litres and gallons, m²/sq ft toggle.
-> Tile Calculator Tiles needed for any floor or wall from area and tile size, with waste allowance — m²/sq ft and cm/in toggles.
-> Wallpaper Calculator Wallpaper rolls from wall area, roll coverage, and pattern waste — with batch-number buying advice.
-> Planning 7
Aquarium Volume Calculator Fish tank volume in litres and gallons plus the water weight your stand must hold — from inner dimensions.
-> Curtain Size Calculator Curtain panel width and length from rod size and fullness — the drapery workroom method.
-> Firewood Cord Calculator Full cords and face cords from your stack dimensions — check deliveries against the legal 128 cu ft cord.
-> Grass Seed Calculator Grass seed for new lawns or overseeding from area and rate — kilograms and pounds, m²/sq ft toggle.
-> Mulch Calculator Mulch, soil, or compost volume from bed area and depth — cubic metres, yards, and bag count. m²/sq ft toggles.
-> Plant Spacing Calculator Plants per bed from spacing, plus seeds to start from the germination rate.
-> Square Footage Calculator Square feet, square metres, and square yards from length and width — ft/m/in toggles for any room or lot.
-> Utilities 4
BTU Calculator AC size in BTU and kW from room area and insulation — avoid undersized or short-cycling units.
-> Pool Volume Calculator Pool volume for chemical dosing: m³, litres, and US gallons from length, width, and average depth.
-> Solar Panel Calculator Panels to cover your electricity bill from monthly kWh, peak sun hours, and panel wattage — with real-world derating.
-> Water Heating Cost Calculator The physics-exact cost of heating water: energy, price, and element time from volume and temperature rise.
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