Construction calculators

Practical site math for home and trade projects.

Paint coverage, tile counts, concrete volumes, and roofing math — with sensible defaults for home projects and trade work.

Calculators
23
Topics: All Materials (18) Rooms (5)
23 results
Construction / Materials

Gravel Calculator

Compute the volume of gravel needed to fill a rectangular area to a chosen depth, plus the approximate weight in tonnes.

basic
23,718 4.3 1 min
Construction / Materials

Sand Calculator

Compute the volume and approximate weight of sand needed to fill a rectangular area to a chosen depth.

basic
2,989 4.1 1 min
Construction / Materials

Topsoil Calculator

Compute the volume of topsoil needed to cover a rectangular bed to a target depth, plus the number of standard 40 L bags...

basic
15,021 4.1 1 min
Construction / Materials

Baseboard Calculator

Compute the linear metres of baseboard or skirting needed for a rectangular room, accounting for door openings and a sma...

basic
946 4.6 1 min
Construction / Materials

Brick Calculator

Estimate the number of bricks required to build a wall of any height and width, including a 10% wastage allowance.

basic
16,445 4.3 1 min
Construction / Materials

Wallpaper Calculator

Estimate how many rolls of wallpaper you need to cover the walls of a rectangular room, with extra for pattern matching.

basic
11,449 4.3 1 min
Construction / Materials

Carpet Calculator

Compute the square footage of a rectangular room and the total cost to carpet it at a given price per square foot or per...

basic
18,840 4.2 1 min
Construction / Rooms

Pool Volume Calculator

Compute the water volume of a rectangular pool from length, width, and average depth, in cubic metres, litres, and US ga...

basic
5,444 4.8 1 min
Construction / Materials

Fence Calculator

Estimate the number of posts, rails, and panels needed to build a straight fence of any length and post spacing.

basic
23,767 5.0 1 min
Construction / Materials

Concrete Calculator

Volume of concrete needed for a slab, footing, or column — with a suggested overage buffer to avoid running short.

Featured basic
17,436 4.3 1 min
Construction / Rooms

Stair Calculator

Plan a straight stair run from the floor-to-floor rise: number of steps, individual riser height, and tread depth that f...

basic
10,287 4.1 1 min
Construction / Materials

Mulch Calculator

Estimate how many cubic yards (or cubic feet) of mulch you need to cover a garden bed of any size to a chosen depth.

basic
4,596 4.1 1 min