What is Electricity Bill Calculator?

An electricity bill calculator estimates your monthly electric costs based on appliance usage. Add your devices with their wattage and daily hours of use, then set your electricity rate to see projected monthly and annual costs.

Each appliance is computed as wattage × hours × days-per-month × quantity, converted to kWh, and multiplied by your per-kWh rate to get monthly cost. The days-per-month field defaults to 30 but you can lower it for appliances you only run a few times a week, so a washer used Saturdays at 4 days/month no longer inflates your bill. Daily, monthly and annual totals show side-by-side, and the breakdown exports to CSV. The tool ships with thirteen currency options including INR, JPY, BRL, and SAR, so the bill output matches what you actually see on your utility statement.

How to use

1. Add appliances by entering name, wattage, hours of daily use, and days per month they actually run.
2. Set your electricity rate (cost per kWh) from your utility bill.
3. Review the daily, monthly and annual cost per appliance, then download the full breakdown as CSV if you want to share it.

When to use

• Pinpointing the appliance driving up your bill before deciding what to unplug or replace.
• Estimating winter heating costs before switching from natural gas to a space heater.
• Sizing a solar panel system by mapping current consumption per device against generation.

Result

A 60W LED TV running 5 hours/day at $0.12/kWh costs $1.08/month. Add a 1500W space heater for 3 hours/day at $16.20/month. Total estimated monthly bill: $17.28.

FAQ

Where do I find the wattage of my appliance?

Check the silver sticker on the back or bottom — it lists wattage (W) or amps (A) and volts (V). If only amps and volts are shown, multiply them: a 6A device at 120V draws 720W. For US appliances, voltage is 120V or 240V; in most of Europe and Asia it's 230V.

Why does my refrigerator's calculated cost seem high?

Fridges don't actually run their compressor 24 hours a day — they cycle on and off. A modern fridge with a 150W compressor runs maybe 8 hours of duty cycle, not 24. Set hours/day to 8-10 for a closer estimate, or use the nameplate's stated kWh/year if available.

What's a normal monthly electricity bill?

In the US the average is around $130/month for 880 kWh; UK and Germany run higher per kWh but lower in absolute usage. A 1500W AC at 6 hours/day alone adds about $32/month at $0.12/kWh, which is why summer bills jump.

Does standby power affect the calculation?

Yes, but it's not modelled by default. Most TVs, set-top boxes and chargers draw 1-5W even when 'off'. Across a household that's 50-100W of constant draw, roughly 35-70 kWh per month. Add a 'standby' line at 60W × 24 hours to account for it.

Is the rate the same every hour of the day?

Not always. Many utilities offer time-of-use plans where rates are higher 4-9pm and lower overnight. If you have a TOU plan, calculate peak-hour appliances (AC, oven, dryer) separately at the higher rate, and run heavy loads like the dishwasher on the off-peak rate.

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