Potting Mix Ratio Calculator

WHATSON / GARDENING

Potting Mix Ratio Calculator

Split any volume into your chosen ingredient parts and bag sizes.

Starting values are editable examples. Enter garden measurements, crop requirements, product labels and local prices.

1 Batch size
Mix ingredients
Gardening

A potting mix ratio divides the final volume among your chosen components.

Enter volume parts and bag sizes for the ingredients you actually intend to use. Review each component before buying.

01 / GET STARTED

How to use Potting Mix Ratio Calculator

  1. Enter finished mix volume.
  2. Add the entries in mix ingredients as separate rows. Include ingredient, volume parts, package volume and package price for each row.
  3. Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
02 / A CLEARER WORKFLOW

Why choose this tool?

Visible component volumes make a blend easier to resize without changing its proportions.

Before you use the result

Parts are volume ratios. This worksheet does not recommend a universal growing medium.

03 / COMMON QUESTIONS

Questions about Potting Mix Ratio Calculator

Is this a recommended mix for every plant?

No. The recipe is your input. Growing medium suitability depends on the plants and conditions.

What should I check before using Potting Mix Ratio Calculator?

Check Finished mix volume, Ingredient, Volume parts and Package volume. Use the exact units shown beside the controls and replace any example values with your own inputs.

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