Free DIY calculators
Quick answers to the questions that come up before every garden build: how much soil a raised bed takes, how many boards to buy, how much gravel a path needs and how much a compost bin holds. Each calculator shows its formula and a worked example, so you can check the numbers yourself.
Raised bed soil calculator
How much soil you need for a raised bed, in cubic yards, cubic metres and bags.
Raised bed lumber calculator
How many boards you need for the sides of a raised bed, with a cutting layout.
Gravel and mulch calculator
How much gravel, bark or mulch you need for a path or bed, by volume and approximate weight.
Compost bin volume calculator
How much a compost bin holds, in cubic feet, cubic metres, litres and gallons.