Lighting savings
LED Light Bulb Savings Calculator
Compare existing bulbs with LED replacements and estimate annual electricity savings and simple payback.
Planning estimate—not a guarantee
Use product labels and your current utility rate. Actual energy use varies with equipment, settings, climate, condition, installation, provider charges, and behavior.
watts
watts
bulbs
hours
$/kWh
$/bulb
Your estimate
Estimated annual savings
$94.94
Monthly savings
$7.91
Annual energy saved
558 kWh
Simple payback
3.8 months
Simple payback compares bulb purchase cost with electricity savings only. It excludes installation, rebates, bulb life, and replacement labor.
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Calculation method
How this estimate is calculated
Savings = (old watts − LED watts) × quantity × hours × 365 ÷ 1,000 × rate
U.S. Department of Energy: LED LightingImportant assumptions
What can change the result
- The LED provides an acceptable replacement for the existing bulb.
- Usage hours are constant throughout the year.
- Payback includes bulb purchase cost but not labor, rebates, or financing.
For the most useful estimate, use measurements from a plug-in energy monitor, connected charger, vehicle dashboard, or product energy label whenever available.
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