Energy Star Savings Calculator — Formula
## How to Calculate Energy Star Savings
Energy Star certified products meet strict energy efficiency guidelines set by the EPA.
### Formula
**Annual Savings = (Standard kWh - Energy Star kWh) * Rate**
**Lifetime Savings = Annual Savings * Lifespan**
### Typical Energy Star Savings
- Refrigerator: 9-10% less energy
- Clothes washer: 25% less energy
- Dishwasher: 12% less energy
- Air conditioner: 15% less energy
Energy Star certified products meet strict energy efficiency guidelines set by the EPA.
### Formula
**Annual Savings = (Standard kWh - Energy Star kWh) * Rate**
**Lifetime Savings = Annual Savings * Lifespan**
### Typical Energy Star Savings
- Refrigerator: 9-10% less energy
- Clothes washer: 25% less energy
- Dishwasher: 12% less energy
- Air conditioner: 15% less energy
Exemplo Resolvido
An Energy Star refrigerator using 350 kWh/year vs standard at 500 kWh/year over 12 years at $0.15/kWh.
- Energy saved: 500 - 350 = 150 kWh/year
- Annual savings: 150 * $0.15 = $22.50
- Lifetime savings: $22.50 * 12 = $270
- Energy reduction: 150 / 500 * 100 = 30%