Consumo aparelho mês
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The 'Appliance Monthly Consumption' calculator estimates the electricity used by a home appliance in a month. It uses the formula: (POWER IN WATTS × DAILY HOURS × DAYS IN MONTH) ÷ 1000. The result is shown in kilowatt-hour (kWh), the unit used in electricity bills.
To use it, input: the appliance's power (watts), average daily usage hours, and days in the month (usually 30). It helps predict costs, compare devices, or identify high-consumption appliances.
Example: A 5500W shower used 1 hour daily consumes 5500×1×30/1000 = 165 kWh/month. Note: Check the exact wattage in the manual and avoid standby devices. This tool doesn't account for voltage fluctuations or circuit losses.
Frequently asked questions
How does the calculator convert watts to kilowatt-hours?
It divides the total by 1000, since 1 kilowatt (kW) equals 1000 watts. Example: 1500W × 2h × 30d = 90,000Wh = 90kWh.
Can I use decimal values for daily hours?
Yes, the calculator accepts decimal inputs. Example: 2.5 hours represents 2 hours 30 minutes.
Works for appliances with variable power?
Use the average from the manual. For devices like inverter air conditioners, use the typical power during normal operation.
How to convert kWh to Brazilian reais?
Multiply the result by your region's energy tariff, which varies by tariff flag and consumption range.