Energy calculators
Estimate running costs using power (kW), runtime, and your electricity price per kWh. Clear, quick, and practical.
Start with the main electricity calculator
Best when you already know power and runtime.
How energy cost is estimated
Electricity cost is usually estimated with a simple formula: kW × hours × price per kWh. If your appliance draws 2.0 kW for 1.5 hours, it uses 3.0 kWh. Multiply by your tariff to estimate cost.
Real appliances vary their draw during a cycle and tariffs may include time-of-use pricing and fixed fees. These calculators give a practical estimate for comparisons, budgeting and decision-making.
All energy calculators
FAQ
Multiply power (kW) by time (hours) to get kWh, then multiply by your price per kWh. Example: 2.0 kW × 1.5 h = 3.0 kWh.
A kilowatt-hour is a unit of energy. Using 1 kW for 1 hour equals 1 kWh. Electricity is typically billed per kWh plus possible fixed charges.
Appliances vary their power during cycles, and tariffs can include taxes, time-of-use pricing and fixed fees. Estimates are best for comparisons and planning.