Electricity Cost Calculator
Estimate active and standby energy for multiple appliances, with averaged monthly projections and optional household charges.
Your inputs stay in your browser.1-30 devices; each quantity 1-1000, power up to 1000 kW, hours 0-24, days 0-7 (two decimals). Active + standby schedules may total at most 168 hours/week. Blank price gives energy only. Unit conversions retain exact canonical power. Drafts stay in memory only; refreshing clears them. Processing and exports stay local.
Enter values or try an example, then choose Calculate / Generate.
How to use Electricity Cost Calculator
Set the device row count, power, quantity and separate active/standby schedules. Leave the energy price blank for energy-only results, or enter a fictional/user-supplied rate. Duty factor estimates cycling only during active use. A fixed monthly charge is optional and household-wide.
Worked example
100 W for 5 hours a day, 7 days a week uses 3.5 kWh/week. At 0.20 per kWh that is 0.70/week. Add 10 W standby for 19 hours/day on all 7 days to add 1.33 kWh/week.
Rules and limits
1-30 devices, quantity 1-1000, power 0-1000 kW. Hours 0-24; days 0-7 with two decimals; active plus standby scheduled hours at most 168/week. Year = week × 365/7, average month = year/12. Price 0-10000/kWh, fixed charge 0-1000000/month, derived money/energy at most 1000000000. No tariff tiers, taxes or electrical safety recommendations.
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