Fabric Softener Calculator
Work out the correct fabric softener dose for your load size and water hardness.
Drum capacity
Load weight
Water hardness
How We Calculate This
Base dose of 35ml for a full load in medium water, adjusted by load fraction and water hardness.
Dose = 35ml × (load weight ÷ drum capacity) × water hardness multiplier
Soft: 0.8x | Medium: 1.0x | Hard: 1.3x
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Always verify quantities and timings for your specific situation.