Construction Calculators
Concrete, gravel, and material estimators for building and DIY projects.
21 calculators
All calculators
- Concrete CalculatorCalculate how much concrete you need in cubic yards, cubic feet, and cubic meters — plus how many 60 lb or 80 lb bags for your slab.
- Gravel CalculatorEstimate how much gravel, crushed stone, or sand you need in cubic yards and tons for a driveway, path, or base layer.
- Square Footage CalculatorCalculate the square footage of a rectangle, circle, or triangle area — with results in square feet, square yards, and square meters.
- Mulch CalculatorCalculate how much mulch you need in cubic yards and 2 cubic foot bags to cover a garden bed at your chosen depth.
- Roofing CalculatorEstimate roof area, roofing squares, and the number of shingle bundles needed from the building footprint and roof pitch.
- Tile CalculatorWork out how many tiles and boxes you need for a floor or wall, including grout lines, a waste allowance for your layout, and the total cost.
- Paint CalculatorWork out how much paint a room needs from its dimensions, number of coats, doors, and windows — with the ceiling, primer, and total cost included.
- Stair CalculatorCalculate riser height, tread depth, stringer length, and total run from your floor-to-floor rise — with code compliance checked as you go.
- Roof Pitch CalculatorConvert roof pitch between rise-per-12, degrees, and percentage grade, and get the rafter length, slope factor, and true roof area.
- Brick CalculatorEstimate how many bricks a wall needs from its dimensions, the brick size, and the mortar joint, with a wastage allowance and bricks-per-square-metre figure.
- Fence CalculatorEstimate the posts, rails, and pickets a fence needs from its length, post spacing, and picket width, with concrete bags for setting the posts.
- Flooring CalculatorWork out how many boxes of flooring a room needs and the total cost from its dimensions, the coverage per box, and a waste allowance for cuts.
- Drywall CalculatorEstimate the drywall sheets, screws, joint tape, and compound a room needs from its wall and ceiling area, with a waste allowance for cuts.
- Wallpaper CalculatorCalculate how many rolls of wallpaper a room needs from its perimeter and height, the roll dimensions, and the pattern repeat that adds waste to every strip.
- BTU CalculatorEstimate the BTUs of heating and cooling a room needs from its area, ceiling height, sun exposure, and occupancy — sizing an air conditioner or heater correctly.
- Deck Board CalculatorEstimate how many deck boards a deck needs from its dimensions, board width, and gap, plus the total linear footage, joist count, and a waste allowance.
- Rebar CalculatorEstimate the reinforcing bar for a concrete slab: bars each way at a chosen grid spacing, total linear footage, grid intersections, and standard bars to buy.
- Wall Framing CalculatorEstimate the studs and plate lumber a wall needs from its length, stud spacing, corners, and openings — the framing material list for a partition or exterior wall.
- Excavation CalculatorCalculate excavation volume in cubic yards from length, width, and depth, plus the loose (swelled) volume to haul away and an approximate weight in tons.
- Board Feet CalculatorCalculate board feet of lumber from thickness, width, length, and quantity — the volume unit hardwood is priced by — with the total cost.
- Baseboard CalculatorCalculate the linear feet of baseboard or trim a room needs from its dimensions, minus doorways, with a waste allowance and the number of standard lengths to buy.