Home & Garden Calculators
Practical calculators for home-improvement and DIY projects - work out exactly how much material you need before you buy. Estimate paint for a room, concrete for a slab, and tiles for a floor or wall, in both metric and imperial units. Each tool shows the formula and a worked example so you can check the numbers yourself.
Paint Calculator
Gallons or liters of paint needed for a room from size, doors, windows and coats.
Concrete Calculator
Concrete volume in cubic yards, feet and meters — plus 40, 60 and 80 lb bag counts.
Tile Calculator
How many floor or wall tiles you need from room size, tile size and waste %.
Mulch Calculator
How much mulch you need — cubic yards, cubic feet, cubic meters and 2 cu ft bags.
Soil & Gravel Calculator
Gravel, stone or soil volume and weight from area and depth (metric and imperial).
BTU Calculator
Room AC and heater sizing in BTU/hr by area, sun, occupants and climate.