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LED Savings

Compare old bulbs with LEDs and see yearly dollar savings.

About LED Savings

The power drop from the bulb swap is multiplied by use time, days and the electricity rate to total the annual savings. LEDs use a fraction of the power of older bulbs, and the savings compound across every socket in the home.

Formula

LED Savings

Savings = (old watts - LED watts) x hours x 365 x rate / 1000

watts saved
Reduction in power draw for the same light output

Worked example

With the default values below, LED Savings returns Watts Saved of 51.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Old bulb wattsminimum 0 W
60 W
LED wattsminimum 0 W
9 W
Hours per dayminimum 0
5
Electricity rateminimum 0 $/kWh
0.15 $/kWh

Results

Watts Saved
51.0 W
Annual Savings
$13.96
Monthly Savings
$1.16

Step by step

  1. 1Values used
  2. 2LED Savings
  3. 3Watts Saved= 51.0 W
  4. 4Annual Savings= 13.96
  5. 5Monthly Savings= 1.16

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is LED Savings calculated?

Savings = (old watts - LED watts) x hours x 365 x rate / 1000 The power drop from the bulb swap is multiplied by use time, days and the electricity rate to total the annual savings.

Why does LED Savings matter?

LEDs use a fraction of the power of older bulbs, and the savings compound across every socket in the home.

What values do I need to enter?

This calculator takes 4 inputs: Old bulb watts, LED watts, Hours per day, Electricity rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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LED Savings – Calculate Watts Saved & Annual Savings