🏗️Construction & Home
Free construction and home calculators: concrete, paint, flooring, tile, square footage and material estimators. Plan a project without the guesswork.
🛣️ Asphalt Calculator Free asphalt calculator estimates the tons, volume and cost of hot-mix asphalt for any driveway, lot or road. Enter length, width and depth for an instant result. 🪵 Board Foot Calculator Free board foot calculator: enter lumber thickness, width and length to get total board feet (BF) and cost. Uses the standard T x W x L divided by 144 formula. 🧱 Brick Calculator Free brick calculator: enter your wall length and height to find how many bricks you need, with brick size, mortar joint, and a waste allowance built in. ❄️ BTU Calculator Free BTU calculator for AC sizing: enter room size or floor area, add sun, kitchen and occupant adjustments to estimate cooling BTU and the AC ton equivalent. 🧶 Carpet Calculator Free carpet calculator: enter each room length and width to find the carpet area in square yards and square feet, add waste, and estimate the total cost. 🧱 Concrete Calculator Free concrete calculator. Enter slab, footing or column dimensions to find cubic yards, cubic meters, the number of 40, 60 or 80 lb bags, and the estimated cost. 📐 Crown Molding Calculator Free crown molding calculator: enter room size or perimeter and piece length to get total linear feet of trim and how many pieces to buy, with miter waste. 📦 Cubic Feet Calculator Free cubic feet calculator: enter length, width, and height in feet, inches, cm, or meters to get volume in cubic feet, cubic yards, and cubic meters instantly. 🧱 Cubic Yard Calculator Free cubic yard calculator for concrete, dirt, gravel and mulch. Enter length, width and depth in feet, inches or meters to get cubic yards and cubic meters. 🪵 Deck Calculator Free deck board calculator: enter your deck and board sizes, gap and waste to find how many deck boards and joists you need, with the deck area shown. 🧱 Drywall Calculator Free drywall calculator: enter wall or ceiling area, pick a sheet size and waste percent, and get the sheetrock sheets needed plus screws and joint compound. 🪵 Fence Calculator Free fence calculator: enter your fence length, post spacing and rails per section to work out how many posts, panels and rails you need, with gates subtracted. 🪵 Flooring Calculator Free flooring calculator: enter room length and width, box coverage and waste percent to find your floor area and how many boxes of flooring you need. 🪨 Gravel Calculator Free gravel calculator: enter length, width, and depth to find how much gravel you need in cubic yards, cubic metres, and tons, with a handy waste allowance. 🧱 Insulation Calculator Free insulation calculator: enter your wall or attic area, the coverage per bag or batt package, and a waste percent to see exactly how many packages to buy. 🪵 Lumber Weight Calculator Free lumber weight calculator: enter board thickness, width, length, quantity and wood type to estimate total weight, weight per board and board feet fast. 🪵 Mulch Calculator Free mulch calculator: enter your bed size and depth to find how much mulch you need in cubic yards, cubic feet and bags. Works in feet or meters, instantly. 🎨 Paint Calculator Free paint calculator: enter room size or wall area, coats, and coverage to see how many litres or gallons of paint you need. Subtracts doors and windows. 🧱 Paver Calculator Free paver calculator: enter your patio size and paver dimensions to see how many pavers you need, including a waste allowance for cuts, breakage and spares. 🪵 Plywood Sheet Calculator Free plywood sheet calculator: enter your area and sheet size to see how many sheets of plywood you need, with a waste allowance and optional cost estimate. 🪵 Post Hole Concrete Calculator Free post hole concrete calculator: enter hole diameter, depth, post size and count to find concrete per post in cubic feet, cubic yards and 50 or 60 lb bags. 🧱 Retaining Wall Calculator Free retaining wall block calculator: enter wall length, height and block size to find how many blocks, rows and cap units you need, with a waste allowance. 🏠 Roof Pitch Calculator Free roof pitch calculator: enter rise and run to get the roof pitch as x-in-12, the slope angle in degrees, slope percent, and the rafter length per run. 🌱 Sod Calculator Free sod calculator: enter your lawn length and width or total area, plus the coverage per roll, to see how much sod you need with a waste allowance and cost. 📐 Square Footage Calculator Free square footage calculator: enter length and width in feet or meters to get area in sq ft and sq m. Add multiple rooms, handle L-shapes, and estimate cost. 🪜 Stair Calculator Free stair calculator: enter your total rise and target step height to get the number of steps, exact riser height, recommended tread depth, and total run. 🧱 Tile Calculator Free tile calculator: enter your room size or area and tile size to find how many tiles you need, including a waste allowance and the number of boxes to buy. ⚡ Voltage Drop Calculator Free voltage drop calculator for single-phase circuits. Enter current, run length, and copper wire size to get the drop in volts and as a percent of supply.
Home and building projects live or die by the material estimate. Our construction calculators work out how much concrete, paint, tile or flooring you need from the dimensions you enter, so you buy the right amount once.
These are planning estimates. Always add a sensible waste allowance and check against supplier guidance.