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Practical tools for thoughtful homes
Simple calculators and practical guides for rugs, paint, wallpaper, curtains, flooring, tiles and screens, with the workings and assumptions shown so you can check them.
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Useful answers, with the method and assumptions left in plain sight.
Room notes
Short, specific guides for the awkward questions a product label rarely answers.
Browse all guidesChoose a rug for a king bed with practical 240 × 300 cm guidance, alternative layouts and a simple measuring checklist.
Choose a rug size for a compact living room using sofa width, furniture placement, floor borders and practical tape-out examples.
Measure a curtain pole or track, calculate fullness and choose the right drop with this practical step-by-step window guide.
Choose a rug for a double bed: 200 × 290 cm is the usual size, 160 × 230 cm suits a small room and 240 × 340 cm a roomy one.
How it works
No mysterious black box. Just useful maths, clearly explained.
Use centimetres, metres, inches or feet. Helpful defaults keep things moving.
Get a practical result with the important workings and allowances alongside it.
Review assumptions, tape out the footprint and compare the maker’s exact dimensions.
Explore practical calculators for the rooms, finishes and furniture you are working with.