One appliance
Estimate one device or EV charging session using a current electricity price you enter.
Free calculator →Free calculator
Electricity Cost Calculator
Estimate appliance energy cost from watts, daily usage, days per month and your current electricity price per kWh.
Formula
Monthly kWh = watts ÷ 1,000 × hours per day × days per month. Monthly energy cost = monthly kWh × the price per kWh you enter. For cycling appliances, a measured average draw is usually more useful than a maximum label wattage.
Calculate once or track many
Home energy ladder
Whole-home workbook
Track many appliances, your tariff and reduced-use scenarios offline.
Use ENERGY-01 →Measure instead of estimate
If a compatible energy-monitor partner is approved later, hardware will only be linked where measured usage materially improves the estimate.