Electricity Bill Calculator

Calculate your monthly power cost based on individual appliance usage and electricity tariff.

Worked Examples

• Example 1: Air Conditioner
  Specs: 1500W, used 8 hours/day for 30 days.
  Daily kWh = (1500 * 8) / 1000 = 12 kWh.
  Monthly kWh = 12 * 30 = 360 kWh.
  Cost (at $0.15/kWh) = 360 * 0.15 = $54.00.
• Example 2: Refrigerator
  Specs: 150W, running 24 hours/day for 30 days.
  Daily kWh = (150 * 24) / 1000 = 3.6 kWh.
  Monthly kWh = 3.6 * 30 = 108 kWh.
• Example 3: CO2 Emission
  If your household uses 500 kWh per month, the estimated CO2 footprint is 500 * 0.7 kg = 350 kg of CO2 per month, depending on your local energy grid mix.

Frequently Asked Questions

• 1. How do I find the wattage of my appliance?
  Wattage is usually listed on a label attached to the back or bottom of the appliance, or in the user manual. Look for 'W' or 'Watts'.
• 2. Are there tiered tariffs?
  Many countries use tiered blocks (e.g., first 50 kWh is cheaper). This calculator uses a flat average tariff for simplicity. To be exact, use the average cost per kWh from your past bill.
• 3. Why is my actual bill different?
  Actual bills include fixed connection charges, meter rents, taxes, and seasonal surcharges. This calculator estimates the pure energy consumption cost.
• 4. Is the CO2 emission accurate?
  0.7 kg per kWh is a rough global average. If your electricity comes from coal, it's higher. If from solar/wind, it's close to 0.
• 5. Does a fridge run constantly?
  While plugged in 24/7, the compressor cycles on and off. The average wattage (e.g., 100-150W) already accounts for this duty cycle over 24 hours.

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