Work out the right detergent dose for your load and water hardness.
Detergent dose scales with load size on a per-kilogram basis, then rises with water hardness because hard water consumes more surfactant. Using the right dose saves money and prevents residue buildup, especially in hard-water areas where guessing leads to overuse.
Laundry Detergent Dose
Dose = load weight x dose per kg x hardness multiplier
Dose = load weight x dose per kg x hardness multiplier Detergent dose scales with load size on a per-kilogram basis, then rises with water hardness because hard water consumes more surfactant.
Using the right dose saves money and prevents residue buildup, especially in hard-water areas where guessing leads to overuse.
This calculator takes 4 inputs: Load weight, Dose per kg, Water hardness, Loads per week. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.