LED Savings Calculator
See how much switching to LED bulbs saves. Enter how many bulbs you replace, their wattage before and after, and how long they are on each day.
- Savings per month
- $17.27
- Energy saved per year
- 1,117 kWh
What you will need
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How this calculator works
Energy saved per year = bulbs × (old watts − LED watts) × hours per day × 365 ÷ 1,000. Savings = energy saved × your electricity rate (U.S. average 18.56¢/kWh, EIA March 2026).
A 60 W incandescent bulb and a roughly 9 W LED give about the same light (around 800 lumens), so the LED uses about 85% less electricity.
LED bulbs also last many times longer, which saves on replacement bulbs — not included in this calculation.
Example: 20 bulbs, 60 W → 9 W, 3 hours a day
- Energy saved: 20 × 51 W × 3 h × 365 ÷ 1,000 = 1,117 kWh a year.
- Savings at 18.56¢/kWh: about $207 a year.
Tips before you buy
- Start with the lights that are on the longest — kitchen, living room and outdoor lights.
- Check the lumens, not the watts, when choosing an LED replacement.
- Use the electricity cost calculator to check other appliances in your home.
Guides
Frequently asked questions
How much money do LED bulbs save?
Replacing one 60 W incandescent with a 9 W LED used 3 hours a day saves about 56 kWh, or roughly $10 a year at the U.S. average rate.
How many watts does an LED bulb use?
A 60 W-equivalent LED uses about 8–10 W; a 100 W-equivalent uses about 14–17 W.
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Last updated October 26, 2026