Energy Bill Savings Calculator
Estimate how much you can save on your energy bill by switching to more efficient appliances or reducing usage.
Formulas Used
Annual Energy (kWh) = (Power in Watts ÷ 1,000) × Hours/Day × Days/Year × Number of Appliances
Annual Cost ($) = Annual Energy (kWh) × Electricity Rate ($/kWh)
Annual Savings ($) = Current Annual Cost − Efficient Annual Cost
Monthly Savings ($) = Annual Savings ÷ 12
N-Year Savings ($) = Annual Savings × N
CO₂ Reduction (kg/year) = Saved Energy (kWh) × 0.386 kg CO₂/kWh
Assumptions & References
- Electricity rate default of 16¢/kWh is the approximate U.S. residential average (U.S. EIA, 2024).
- CO₂ emission factor of 0.386 kg CO₂ per kWh is based on the U.S. EPA eGRID national average (2023).
- Savings are calculated assuming consistent daily usage throughout the year with no standby/idle power draw.
- No appliance purchase cost or installation fees are factored in — this calculator focuses on operational energy savings only.
- Results are estimates; actual savings vary by region, utility pricing structure, and real-world usage patterns.
- For time-of-use (TOU) rate plans, use your blended average rate for best accuracy.