Home Electricity Bill & House Consumption Calculator
Estimate your monthly and annual electricity bill based on individual appliance running hours, energy tariff rates (per kWh), and contracted fixed power demand.
Electricity Rates & Contracted Power
Utility RatesHousehold Appliances & Daily Usage
Adjust quantity, wattage and daily run hoursEstimated Electricity Cost Breakdown
Endesa Model💡Personalized Energy & Bill Saving Tips
- ✓Adjust Contracted Power: If your circuit breaker never trips, you may be overpaying on fixed demand charges. Lowering contracted power by 1 kW saves $35–$60 annually.
- ✓Upgrade to Inverter Technology: Inverter compressors in air conditioners and refrigerators modulate speed instead of cycling full power on/off, reducing consumption by 30–50%.
- ✓Switch to 100% LED: Replacing traditional incandescent or halogen bulbs with LEDs cuts lighting electricity usage by up to 85% with zero loss of brightness.
- ✓Eliminate Vampire Load: Standby power drawn by TV boxes, gaming consoles, and microwave clocks accounts for 5% to 10% of residential electric consumption. Use smart surge protectors.
📊How Electric Bills Are Calculated
Utility electric bills are composed of two primary charges: (1) The Variable Energy Term (Total kWh consumed × Tariff per kWh) and (2) The Fixed Power Term (Subscribed kW capacity × Rate per kW/month). Value Added Tax (VAT) and meter rental fees are then applied on top of both sub-totals.
Frequently Asked Questions about Home Electricity Consumption
How is household electricity consumption calculated in kWh?
Electricity consumption is calculated using the formula: kWh = (Appliance Wattage × Hours used per day × 30.5 days) / 1,000. For instance, a 1,500W air conditioner running 6 hours daily consumes: (1,500 × 6 × 30.5) / 1,000 = 274.5 kWh per month.
What is contracted power (potencia contratada)?
Contracted power is the maximum electrical power (measured in kW) that your home can draw simultaneously from the grid without tripping the main ICP (Interruptor de Control de Potencia) switch. You pay a fixed monthly charge for this capacity regardless of whether you consume any electricity.
Which appliances consume the most electricity in an average home?
Heating and cooling appliances dominate consumption: Air conditioners, electric heat pumps, water heaters, and electric space heaters represent 45% to 65% of total home energy usage. Refrigerator-freezers run 24/7 and constitute another 15% to 20%.
Can I lower my electric bill without sacrificing comfort?
Yes. Setting your air conditioner to 24°C–25°C (75°F–77°F) instead of 20°C (68°F) reduces cooling electricity by up to 30%. Washing clothes at 30°C instead of 60°C saves 60% of washing machine energy because water heating requires the vast majority of power.