Calculate kWh consumption and bill impact for devices and household energy planning.
Overview
Electricity cost awareness helps prioritize efficiency upgrades and usage habits.
This calculator converts appliance power and runtime into energy cost estimates.
Use your local utility tariff for realistic monthly projections.
Steps
Input rated power in watts.
Provide daily or monthly runtime.
Calculate energy use in kilowatt-hours.
Multiply kWh by tariff per unit.
Estimate recurring expense and compare appliances.
Math
Energy (kWh) = Power (W) * Time (h) / 1000; Cost = kWh * Rate
Energy usage is power over time; cost equals usage multiplied by tariff.
Worked cases
75*8*30/1000 then *0.15
Monthly cost about 2.70
1500*6*30/1000 then *0.18
Monthly cost about 48.60
Energy difference * rate
Significant annual savings
Why use this
Questions