LED Bulb Savings Calculator
Savings from replacing old bulbs with LEDs.
W
W
h
$/kWh
$
How it works
Energy saved = bulbs × watt difference × hours per day × 365 ÷ 1000. Savings = kWh saved × price. Payback = bulb cost ÷ yearly savings. Bulb lifespan is not included, but LEDs last far longer than incandescent bulbs, adding to the savings. Example: with the default values, annual savings comes to $279.22.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.