🔨 Home & DIY Tools

Pick the two things you are joining and the conditions it has to survive, and this works out which adhesive will actually hold — with open time, clamp time, full cure and the surface prep that make...

A board foot is 1" × 12" × 12". Enter the dimensions of your boards and the quantity, and get the board footage, linear footage and cost.

Calculate how many bricks you need for any wall — including mortar joints, waste, and pallets to order. Works for UK standard, metric, and imperial bricks.

Keeps the dates that are easy to miss and expensive to miss in one place: MOT, tax, insurance, service intervals, and the four items that actually cause MOT failures. Saved in your browser only — n...

Calculate cement, sand, gravel, and water for any concrete project — from fence posts to shed bases.

Answer a few questions about the damp patches, mould and smells in your home and get the most likely cause — condensation, penetrating damp, rising damp or a leak — with the practical fixes and whe...

Check how far a joist can safely span: pick the lumber size, spacing, wood type and load, and get the maximum span plus the beam and post spacing to match.

Calculate boards, joists, posts, screws, and total cost for a timber decking project. Works for softwood, hardwood, and composite decking.

A common rule is spacing ≈ 0.5–0.75 × ceiling height, with the first lamp about half that from the wall. Check beam angle and joists — this is a layout sketch, not a lighting design.

Order the right amount of board: enter the wall and ceiling area, pick a sheet size and wastage, and get the sheet count plus the joint compound, tape and screws to finish it.

Calculate posts, panels, gravel boards, concrete, and total cost for a garden fence. Works for panel fencing, closeboard, and picket styles.

How many plants fit a bed at a given spacing. Square grid is simplest; triangular (hex) packing fits about 15% more. Leave paths out of the length and width.

Calculate how much gravel, slate, chippings, or aggregate you need for driveways, paths, patios, or garden beds. Includes tonnes, bulk bags, and cost.

The tiles are one thing — the grout and adhesive to fix them are another. Enter the tiled area, tile size and joint width to work out how much grout and thinset to mix.

Estimate how much you could save by insulating your loft, walls, or floor. Based on UK energy prices.

Work out how many packs of laminate to buy: enter the room, the plank size, planks per pack and pack price, and this adds the wastage so you don't run short mid-lay.

UK, US and EU bed names are not the same size. A UK king is 150 × 200 cm; a US king is 193 × 203 cm. Fitted sheets do not stretch that gap. Depth (deep-fitted) is separate.

Turn a balcony, windowsill or tiny yard into real food. Tell it your space, sun and season and it ranks what to grow by calories per square metre — with a sowing calendar, harvest forecast and mone...

Set the saw for a perfect corner: enter the corner angle and pick flat or crown molding, and get the miter and bevel angles to dial in.

Volume = area × depth. A 50 litre bag is 0.05 m³. Bark mulch is usually 5–8 cm; paths can be 10 cm. Order a little extra for settling — bags are sold by loose volume.

Calculate exactly how much paint you need for any room. No more buying 5 tins for a cupboard.

Calculate the perfect height and hook position so your pictures hang straight and look professional.

Calculate how much plaster, render, or screed you need for walls, ceilings, or floors. Includes bags, coverage, and estimated cost.

Look up the right pipe diameter for any domestic plumbing job. Covers hot/cold water, central heating, and waste.

Litres and gallons from length, width and average depth. Rectangular, circular and oval. Chemical dosing is per 1,000 litres — this is volume only, not a treatment plan.

Throw ratio = distance to screen ÷ image width. A 1.5:1 lens 3 m from the wall makes a 2 m wide picture. 16:9 assumed unless you change it. Check the projector’s own min/max zoom range.

1 mm of rain on 1 m² is 1 litre. Multiply by a runoff coefficient (tiles ~0.85, felt ~0.8). UK roofs often yield more than a water-butt can hold — size the tank, not just the dream.

Roof pitch is the rise in inches for every 12" of run. Enter the pitch and half-span (run), and get the rafter length, angle and roof-area multiplier.

Estimate the heating and cooling load for a room: area, ceiling height, insulation, sun exposure, occupancy and climate all move the number of BTUs you need.

Drag and drop furniture to plan your room layout. Scale-accurate 2D top-down view.

Look up the right drill bit for any screw size, wall plug colour, and pilot hole diameter. No more guessing.

Calculate the right bracket size, spacing, and load capacity for your shelf project.

Rough cubic yards from room waste, rubble or bags. UK skips are sold in yards: 4, 6, 8, 12, 16. Loose waste settles; rubble is heavy — many yards cap weight before the skip looks full. Not a quote.

Size a straight staircase: enter the total rise and your preferred riser height, and get the number of steps, the tread depth, total run and the stair angle — checked against the comfortable 2&time...

Frame a wall the way a carpenter would: enter the wall length, stud spacing, openings and corners, and get the stud count, plate lumber and headers to order.

Calculate tiles, planks, or carpet needed for any room — including waste and cuts.

Recommend a sofa distance from screen diagonal and resolution. Uses SMPTE 30° field-of-view, THX 40°, and a sharpness seat where 4K/1080p pixels sit at about 1 arc-minute. Advice, not a living-room...

Not sure what fixings to use? Tell us your wall type and what you're hanging — we'll tell you exactly what to buy.

Calculate how many rolls of wallpaper you need — accounting for pattern repeat, doors, and windows.