Free energy savings calculator. Estimate how much money you can save by upgrading to efficient lighting, appliances, HVAC systems, or adjusting thermostat settings. Compare current vs new equipment costs and payback periods.
Default rates are US averages. Enter your actual utility rates for accurate savings. Check your electricity bill for $/kWh and gas bill for $/therm.
You might also find these calculators useful
Calculate your annual CO₂ emissions from daily activities
Calculate solar system size, cost, and savings for your home
Estimate your electricity costs
Calculate offset cost per ton of CO₂ and trees needed
Wondering how much you could save by switching to LED bulbs, upgrading your AC, or getting a high-efficiency furnace? Our energy savings calculator helps you estimate annual savings, payback periods, and environmental benefits from efficiency improvements. Make informed decisions about home upgrades with real cost projections.
Energy savings are calculated by comparing the energy consumption of your current equipment to more efficient alternatives. For lighting and appliances, this means comparing wattage. For HVAC systems, efficiency is measured in SEER (cooling) or AFUE (heating). The calculator factors in your usage hours, electricity/gas rates, and number of units to project annual savings.
Basic Energy Savings Formula
Annual Savings = (Current kWh - New kWh) × Electricity RateSee exactly how long it takes for an efficient appliance to pay for itself through energy savings.
Evaluate different efficiency levels (e.g., 16 SEER vs 20 SEER AC) to find the best value for your situation.
Know your expected monthly and annual savings to plan household budgets and prioritize improvements.
Understand how efficiency improvements reduce your carbon footprint and contribute to sustainability.
Planning home improvements and wanting to prioritize upgrades with the best ROI.
Evaluating whether LED bulbs or efficient portable appliances are worth the investment.
Showing customers the long-term value of high-efficiency heating and cooling systems.
Calculating savings across multiple units to justify building-wide efficiency upgrades.
A single 60W incandescent bulb replaced with a 9W LED saves about $8-10 per year (at average US rates with 5 hours daily use). A whole-home upgrade of 20 bulbs can save $150-200 annually. LEDs also last 15-25 years, eliminating replacement costs.
The federal minimum is 14 SEER, but Energy Star units are 16+ SEER. In hot climates with heavy AC use, 18-20 SEER can save $100-300/year vs a 14 SEER unit. However, higher SEER units cost more upfront, so calculate payback based on your cooling hours.
If you have an older 80% AFUE furnace, upgrading to a 95%+ AFUE unit can save 15-20% on heating costs—often $200-400/year in cold climates. The upgrade typically pays back in 7-12 years while also improving comfort and reliability.
The rule of thumb is 3% savings per degree of setback. Lowering heat by 2°F in winter or raising AC by 2°F in summer saves about 6% on that season's energy costs. A programmable or smart thermostat automates this for maximum savings.
LED bulbs: 6-12 months. Smart thermostat: 1-2 years. Energy Star appliances: 3-7 years. High-efficiency HVAC: 5-12 years. Heat pump water heater: 4-8 years. Faster payback comes with higher usage and electricity rates.
Generally, wait until equipment fails unless: 1) It's very old and inefficient (e.g., 10+ SEER AC), 2) Energy costs are high in your area, or 3) Utility rebates make upgrades attractive. The calculator can help you decide if early replacement makes financial sense.