Watts, units and the appliances that actually cost you — calculate it all free.
Solve cost = P(kW) × hours × tariff step by step — free heating cost calculator with worked examples, real-world defaults and instant answers.
Solve I = P / V step by step — free appliance current calculator with worked examples, real-world defaults and instant answers.
Solve saving = E·r·(1 − 1/COP) step by step — free heat pump savings calculator with worked examples, real-world defaults and instant answers.
Solve t = V·c·ΔT / P step by step — free geyser heating calculator with worked examples, real-world defaults and instant answers.
Solve E = flow × t × c × ΔT step by step — free shower energy calculator with worked examples, real-world defaults and instant answers.
Solve t = V·Ah·η / P step by step — free inverter backup calculator with worked examples, real-world defaults and instant answers.
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