Calculadora de Energia Elétrica Residencial

The Residential Electricity Calculator estimates monthly consumption in kWh and the electricity bill amount based on the appliances you use at home. Simply enter the appliance power (in watts), how many hours per day it is on, and how many days per month. The tool calculates total consumption and, if you enter the energy tariff (R$/kWh), also shows the approximate cost. This helps identify which equipment most impacts your bill.

The calculation is straightforward: first convert power from watts to kilowatts (divide by 1000). Then multiply by daily usage hours and days in the month to get consumption in kWh. For example, a 5500 W shower used 30 minutes daily for 30 days consumes (5500/1000) × 0.5 × 30 = 82.5 kWh. Multiplying by the tariff (e.g., R$ 0.80/kWh) gives a cost of R$ 66.00 per month. You can simulate different appliances.

Use this calculator for household budget planning, comparing old versus new energy-efficient appliances, or deciding whether to reduce usage time of certain equipment. It is also useful for sizing solar energy systems, as total kWh consumption is the basis for the project. Businesses can use it to estimate consumption in offices or small retail spaces.

Important precautions: check the actual power rating (usually on the label or manual), as nominal values may vary. Consider that motor-driven appliances (refrigerator, air conditioner) cycle on and off, so usage time should be an average. The energy tariff varies by region and tariff flag (green, yellow, red). Update the tariff with the value from your latest bill for greater accuracy.