Work out laundry load cost instantly with clear inputs, formula shown and shareable results.
Laundry cost per kilogram combines water, energy and chemistry, with energy for heating typically the largest element. Benchmarking in cost per kilogram rather than cost per load is essential because load weights vary and partial loads are far more expensive per kilogram.
Water used
Water = Load weight x Litres per kg
Energy used
Energy = Load weight x kWh per kg
Cost per kg
Cost per kg = Total cost / Load weight
Modern tunnel washers achieve 6-10 litres per kilogram; older washer-extractors use 15-25. Water reuse systems cut this substantially.
Because water fill and heating are largely fixed per cycle, so halving the load barely reduces the cost.