Calculator

Soil pH Amendment Calculator

Calculate the estimated amount of Garden Lime (Calcium Carbonate) or Elemental Sulphur required to adjust your soil pH. Note: These are standard agricultural estimates. Clay soils require more amendment than sandy soils due to higher buffering capacity.

This calculator requires JavaScript. Standard rules of thumb:

To raise pH by 1.0 unit: ~300g Garden Lime per sq metre (Loam).

To lower pH by 1.0 unit: ~100g Elemental Sulphur per sq metre (Loam).

Current pH: Target pH: Area (Square Metres): Soil Type:

Soil pH Amendment Calculator

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