Calculadora de Custo de Energia Elétrica — Formula

How to Calculate Electricity Cost

Convert wattage to kilowatts, multiply by usage hours to get kWh, then multiply by your utility rate.

Formula

Daily kWh = Wattage / 1000 x Hours Per Day

Daily Cost = kWh x Rate Per kWh

Exemplo Resolvido

A 1,500W space heater running 4 hours/day at $0.14/kWh.

  1. Daily kWh = 1,500 / 1,000 x 4 = 6.0 kWh
  2. Daily cost = 6.0 x $0.14 = $0.84
  3. Monthly cost = $0.84 x 30 = $25.20
  4. Annual cost = $0.84 x 365 = $306.60