Home & DIY

How much paint a room needs, allowing for doors and windows

Work out the bricks and mortar a wall needs, for a single or double skin wall

How many packs of flooring a room needs, including waste

Work out the volume of concrete needed for a slab, footing or column, in cubic metres and bags

Work out the finished size of a cross stitch design from its stitch count and fabric count, and how much fabric to cut

Soil, compost or mulch for a bed, in litres and bags

Work out how many plasterboard sheets, screws and how much joint compound a room needs

Work out how many stitches to cast on and rows to knit for a target size, from a gauge swatch

Work out the cost of heating a home from daily kWh use and a unit rate, per day, month and year, plus what one degree on the thermostat costs

Work out the posts, rails and panels for a fence run, with the post spacing this gives you

Work out annual generation from an array size, orientation and tilt, and the payback period from install cost, export rate and how much of the power is used in the home

Work out how much grout a tiled area needs from the tile size and the joint width

Calculate roll length for identical rectangular pieces across a stated usable width

Work out how many rolls of insulation a loft or wall needs, and the U-value improvement

Work out the board feet and cost of a cut list from the dimensions of each piece

Work out roof pitch in degrees, ratio and percent, and the rafter length

Work out the boards, joists and fixings a deck needs from its dimensions, board width and gap, with a waste allowance

Work out the fabric width and drop a curtain needs from the window size and heading type, with pattern repeat and hem allowed for

Calculate installed lumens and whole lamps from area, target lux, and explicit light-loss factors

Work out how many tiles and boxes an area needs, allowing for waste from cuts

Work out how many rolls of wallpaper a room needs, allowing for the pattern repeat