Soil, Compost & Mulch Calculators
How much soil, compost or mulch do you need, and is it cheaper by the bag or by the bulk load? These tools turn your measurements into volumes, bags and mixes, in metric or imperial.
Raised Bed Soil Calculator
How much soil mix fills your raised beds, split into topsoil, compost and aeration.
Gives youvolume · mix · bags · bulkSoil & mulchTopsoil Calculator
How much topsoil to order for a lawn, bed or level-up, by volume, weight or bag.
Gives youvolume · weight · bagsSoil & mulchMulch Calculator
Bags or bulk mulch for your beds and borders at the depth you choose.
Gives youvolume · bags · coverageSoil & mulchCompost Calculator
Compost for top-dressing, new beds or lawns, in bags or bulk.
Gives youvolume · bags · weightSoil & mulchPotting Soil Calculator
Potting soil for several container sizes at once, with bags to buy.
Gives youvolume per pot · total · bagsSoil & mulchSoil Amendment Calculator
How thick a layer of compost or other amendment to spread to reach a target mix.
Gives youlayer depth · volume · bagsSoil & mulchGarden Volume Calculator
The volume of any bed, planter or hole in litres, cubic feet, cubic yards and cubic metres.
Gives youlitres · cu ft · cu yd · bagsSoil & mulchSoil Calculator
Volume, weight, bags and truck loads for soil, compost, sand or gravel.
Gives youvolume · weight · bags · loadsSoil & mulchTopsoil Weight to Cubic Feet Calculator
Convert a bag of topsoil, soil or mulch between pounds, kilograms, cubic feet and litres.
Gives youcu ft · litres · lb · bags per yardSoil & mulchCompost C:N Ratio Calculator
The carbon-to-nitrogen ratio of your compost mix, and how many browns to add for 30:1.
Gives youC:N ratio · browns to addWhich soil & mulch calculator do you need?
- Raised Bed Soil Calculator: How much soil mix fills your raised beds, split into topsoil, compost and aeration.
- Topsoil Calculator: How much topsoil to order for a lawn, bed or level-up, by volume, weight or bag.
- Mulch Calculator: Bags or bulk mulch for your beds and borders at the depth you choose.
- Compost Calculator: Compost for top-dressing, new beds or lawns, in bags or bulk.
- Potting Soil Calculator: Potting soil for several container sizes at once, with bags to buy.
- Soil Amendment Calculator: How thick a layer of compost or other amendment to spread to reach a target mix.
- Garden Volume Calculator: The volume of any bed, planter or hole in litres, cubic feet, cubic yards and cubic metres.
- Soil Calculator: Volume, weight, bags and truck loads for soil, compost, sand or gravel.
- Topsoil Weight to Cubic Feet Calculator: Convert a bag of topsoil, soil or mulch between pounds, kilograms, cubic feet and litres.
- Compost C:N Ratio Calculator: The carbon-to-nitrogen ratio of your compost mix, and how many browns to add for 30:1.
Every tool works in metric or imperial units, shows its formula and a worked example, and lets you edit the assumptions that vary from garden to garden. Results stay on your device; nothing you enter is stored.
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