Home & DIY Tools
How many rolls of wallpaper, bags of mulch or boards of decking does the job actually need? The home & DIY calculators turn room dimensions into shopping lists — with waste percentages handled honestly so you buy right the first time. Everything runs in your browser, so measure, calculate and head to the store.
13 tools, ready when you are
- Electricity Cost Calculator Estimate the running cost of an appliance from its wattage, daily hours, days, and your electricity rate. Home & DIY
- Paint Calculator Estimate how much paint you need for a room from its dimensions, the number of coats, and the paint coverage. Home & DIY
- Tile Calculator Calculate how many tiles you need from the floor or wall area, tile size, and a waste allowance. Home & DIY
- Wallpaper Roll Calculator Work out how many rolls of wallpaper a wall needs from area, roll size, and pattern repeat — strips planned, not guessed. Home & DIY
- Flooring Calculator Convert a room's floor area into planks and boxes, with a waste factor for cuts, defects, and the plank you'll need in three years. Home & DIY
- BTU Room Sizing Calculator Size a heater or air conditioner for one room: BTU per hour from floor area, ceiling height, insulation, sun, occupants, and climate. Home & DIY
- Fence Calculator Turn a perimeter length into fence posts, panels, rails, and gate bays — with the closed-loop corner math done for you. Home & DIY
- Grass Seed Calculator Weigh your lawn, not your guess: seed for new lawns or overseeding, plus fertilizer product from its nitrogen percentage. Home & DIY
- Mulch Coverage Calculator Turn bed area and depth into cubic yards, cubic feet and exact bag counts for mulch, soil or gravel. Home & DIY
- Deck Board Calculator Count deck boards, joists and screws from deck size, board width, gap and joist spacing. Home & DIY
- Insulation Batt Calculator Size batts or rolls for a wall or attic from area, R-value and stud spacing. Home & DIY
- Drywall Sheet Calculator Sheets of drywall for a room from dimensions, ceiling, doors and windows — plus screws. Home & DIY
- Stair Stringer Calculator Risers, treads, run, stringer length and angle from total rise — with the comfort check. Home & DIY
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