Electricity Cost Calculator

Estimate your energy consumption and monthly utility costs

Common: LED (10W), Fan (70W), AC (1500W)
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Estimated Monthly Bill (30 Days)
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Units/Month
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Cost/Day
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How to Calculate Electricity Consumption?

Your electricity bill is calculated based on the total Kilowatt-hours (kWh) consumed. One kWh is effectively using 1000 watts of power for one hour.

The Formula

  • Daily Units (kWh): $(Wattage \times Hours \times Qty) / 1000$
  • Monthly Cost: $Daily Units \times 30 \text{ days} \times \text{Cost per Unit}$

Frequently Asked Questions

⚡ What is a "Unit" of electricity?

One unit of electricity is equal to 1 kilowatt-hour (kWh). If you use a 1000-watt appliance for one hour, you have consumed exactly one unit.

💰 How do I find the cost per unit?

Check your most recent electricity bill. It usually lists the rate per kWh (e.g., ₹7.00 or $0.15). Some regions have "slabs" where the rate increases as you use more energy.

🔌 Which appliances consume the most power?

High-wattage appliances include Air Conditioners (1500W-3000W), Water Heaters/Geysers (2000W), and Electric Irons (1000W). Lighting and fans usually consume very little (10W-70W).