Calculadora de Água do Banho — Formula

How to Calculate Shower Water Usage

Showers account for about 20% of indoor water use and are a major hot water expense.

Formula

Water per Shower = Duration (min) * Flow Rate (GPM)

Annual Water = Per Shower * Showers/Week * 52

Flow Rates

  • Standard showerhead: 2.5 GPM
  • WaterSense low-flow: 2.0 GPM
  • Ultra low-flow: 1.5 GPM
  • Rain showerhead: 2.0-2.5 GPM

    • Exemplo Resolvido

    An 8-minute shower with 2.5 GPM showerhead, 7 showers/week, $0.02/gal heating cost.

    1. Water per shower: 8 * 2.5 = 20 gallons
    2. Weekly: 20 * 7 = 140 gallons
    3. Annual: 140 * 52 = 7,280 gallons
    4. Heating cost: 7,280 * $0.02 = $146/year