CALCULATOR
Electricity Cost Calculator
Estimate usage cost from appliance watts, duration and supplied energy tariff. Example: Watts: 1000 W, Hours: 2 hours, Supplied price per kwh: 0.2 currency/kWh gives 0.4 currency. Single appliance at constant supplied real power; supplied flat energy tariff only. Excludes standby variation, fixed charges, tiered tariffs, taxes and live rates.
Single appliance at constant supplied real power; supplied flat energy tariff only. Excludes standby variation, fixed charges, tiered tariffs, taxes and live rates. Derivation: 1000 W = 1 kW; kW × hours is kWh; multiply supplied price per kWh.
Accepted inputs: Watts: 0 to 1,000,000 W; Hours: 0 to 10,000 hours; Supplied price per kwh: 0 to 1,000 currency/kWh.
usage cost from appliance watts, duration and supplied energy tariff
How the calculation works
usage cost = watts/1000 × hours × price/kWh
Worked example
With watts 1,000 W, hours 2 hours, supplied price per kwh 0.2 currency/kWh, usage cost from appliance watts, duration and supplied energy tariff is 0.4 currency.
Assumptions and limits
Single appliance at constant supplied real power; supplied flat energy tariff only. Excludes standby variation, fixed charges, tiered tariffs, taxes and live rates. Derivation: 1000 W = 1 kW; kW × hours is kWh; multiply supplied price per kWh.