Free tools

Free home & DIY calculators

Instant answers for projects around the house and your bills. No account, no sign-up — the maths runs right in your browser.

• Gravel Calculator

  Work out exactly how much gravel, crushed stone or pea gravel to order — in cubic yards and tons — before you call the supplier.

• Paint Calculator

  Get the number of gallons for any room in seconds, with doors and windows deducted and coats included.

• Topsoil Calculator

  Find out how much topsoil to order for a new lawn, raised bed or garden border.

• Sand Calculator

  Calculate paver base sand, play sand or mason sand for any area.

• Mulch Calculator

  Work out bark, woodchip or rubber mulch for garden beds and paths.

• Wallpaper Calculator

  Count rolls the way decorators do — by strips — so pattern matching never leaves you short.

• Flooring Calculator

  Add the right waste allowance and turn square feet into boxes before you buy.

• Tile Calculator

  Count tiles for a floor, shower or backsplash, including cuts and breakage.

• Deck Stain Calculator

  Estimate stain for deck boards and railings, including a second coat.

• Electricity Cost Calculator

  See exactly what a heater, fridge, PC or AC adds to your bill.

• Fence Calculator

  Count every post, rail and picket for a wood fence before you shop.

• Paver Calculator

  Everything for a paver patio in one go: pavers, gravel base and sand.

• Moving Cost Calculator

  A realistic estimate before you collect quotes, so you know a fair price when you see one.

• Stain Rescue Wizard

  Choose what spilled and where — get the exact method, in the right order.

• Bill Negotiator

  Build a call script for your provider, with the lines that get retention offers.

• Seasonal Maintenance Tracker

  A season-by-season checklist that remembers what you've done.