Home & DIY Calculators
Make everyday home projects easier with practical calculators that turn measurements and costs into clear planning numbers.
Home project tools
Paint CalculatorEstimate paint needed for walls, rooms and DIY projects using your measurements.Wallpaper CalculatorFind how many rolls a room needs, allowing for pattern repeat, doors and windows.Flooring CalculatorWork out how much flooring to buy, including waste, boxes and an estimated cost.Cubic Yard CalculatorConvert length, width and depth into cubic yards for mulch, soil, gravel or concrete.Get a better estimate
Measure carefully, keep units consistent, and account for doors, windows, coats and the coverage listed on your paint container.
Plan the wider household cost
Material costs are only part of a project budget. Compare planned spending with the Household Monthly Budget Calculator before you buy. You can also explore Kitchen & Recipe Calculators and Travel & Fuel Calculators.
Helpful paint guides
For room-by-room detail, read How Much Paint Do I Need for a Room?, How Much Paint Do I Need for a 12×14 Room?, and How to Calculate Paint for Multiple Rooms.
Before buying project materials
Measure each area separately and keep units consistent. Check the coverage or dimensions stated by the manufacturer, then account for cuts, pattern matching, surface condition and the number of coats where relevant. Calculator results are estimates: unusual room shapes, uneven walls and installation methods can change the quantity required. Recheck measurements before placing an order.
Use the calculator first, then use the result as a practical buying and project-planning estimate.
Calculate paint needed →