Home Electrical Load Growth Calculator
Estimate your home's future electrical load based on current consumption, annual growth rate, and projection period.
Formulas Used
Future Load: F = P × (1 + r)n
Total Cumulative Energy (r ≠ 0): Etotal = P × [(1 + r)n − 1] / r
Total Cumulative Energy (r = 0): Etotal = P × n
Annual Cost: Cost = Load (kWh) × Rate ($/kWh)
Where: P = current annual load (kWh/yr), r = annual growth rate (decimal), n = number of years
Assumptions & References
- Growth rate is compounded annually (exponential growth model).
- The U.S. average residential electricity consumption is approximately 10,500 kWh/year (EIA, 2022).
- The U.S. average retail electricity price is approximately $0.13/kWh (EIA, 2023).
- Typical residential load growth rates range from 1%–3% per year due to new appliances, EVs, and HVAC upgrades.
- Electricity rate is assumed constant over the projection period; real rates may increase with inflation.
- This calculator does not account for energy efficiency improvements, solar generation, or demand-side management.
- Reference: U.S. Energy Information Administration (EIA) — Residential Energy Consumption Survey (RECS).
- Reference: IEEE Std 141 (Red Book) — Recommended Practice for Electric Power Distribution for Industrial Plants (load growth methodology).