LED Lighting Savings

LED bulbs use 75–90% less energy than incandescent bulbs and last 15–25× longer. This calculator quantifies the annual financial savings from switching

The calculator uses the standard published formula for led savings. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with pounds, inches, percentages, watts. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Annual saving = (Old W − LED W) / 1000 × Hours/day × 365 × Rate × Bulbs. Each step in the calculation is shown so you can verify the result manually.