Enter your pot volume and a recipe type to see how much peat, perlite, bark and compost to measure out.
100% Local
How to Use the Soil Mix Calculator
Enter the volume of your pot in litres, choose the recipe that matches your plant, then press Calculate. The tool scales each ingredient ratio to your pot and lists the volume of peat, perlite, bark, grit and compost to measure out. Use Clear to reset the form.
Choosing a recipe
General foliage suits most houseplants that like an airy, moisture-retaining mix.
Succulent & cactus adds extra grit for fast drainage.
Orchid is bark-based, because orchids grow in chunky medium rather than soil.
Vegetable & seedling is richer in compost for hungry, fast-growing crops.
Features
Four common recipes covering foliage plants, succulents, orchids and seedlings
Scales ratios by volume to any pot size in litres
Shows both the volume and the percentage of each ingredient
Works on desktop, tablet and mobile with no sign-up
All processing runs locally in your browser. Your data is not uploaded to any server.