LED ROI Payback Calculator

Universal ROI Calculator

A Tool to Calculate
Payback of LED Lighting
with costs & interest
Click for wide screen version

Please read:
ENSURE THAT REPLACEMENT HAS EQUIVALENT LIGHTING PERFORMANCE.
This calculator gives payback time, and both the annual and life-time cost & savings figures for energy, maintenance, and CO₂ production. It calculates Lighting Power Density from area of at least 50 square feet per fixture, and provides the maximum fixtures allowed from a target LPD.
This calculator will not perform properly if removed from this site. Updates and maintenance are performed on the web site.

Compare incandescent to A19 LEDs by: LEDnovation or Philips or Toshiba

Label Label

Simple ROI is calculated on product lifetime using energy and maintenance repayment, with the industry standard [ (Payback – Investment) ÷ Investment ×100 ] formula.
Cost may be full direct if retrofit, or may be difference (Original - New) if complete new installation. Interest is added to the Investment and original equipment costs for calculating payback and ROI. Include ALL COSTs and verify calculations before implementing a solution. Check with your electric utility provider for rate structures related to Lighting Power Density (LPD/UPD). Site owner not responsible for errors, misapplications or oversights.

Start with the Tab key, or select an entry with mouse.
Step forward with Tab; fill in shaded cells as required.
Step back with Shift Tab.

Parameters for energy statistics: Label

Lighting Power Density Section

Enter Power Consumption & No. of Fixtures

Label

Label

LPD = Total Watts ÷ Total Square Feet

Original Watts

LED Watts

Quantity

Sq-Ft per Fixture = Label Total

Total Label kW

Enter Target LED LPD

Hour-Day-Week Notes:
• For Occ. sensors or dimming, use
average hours
• For photocell use nighttime hours
• Use decimal weeks if holidays
affect lighting (1 day = 0.14 wk)

× Daily use

Hours

This LPD combo allows Label LED fixtures.

× Weekly use

Days

Label

LPD Statistics W/Ft ²

Original LPD Label
– LED LPD Label
= Saved Label

× Yearly use

Weeks

× Power Cost

/ kWhr

Annual Energy Cost:

Original $Label

LED $Label

LPD Notes:
• Target LPD uses LED Watts and Quantity, and affects only the count below it.
• HID LPD = LED projection when = Watts.

Annual Savings =

$Label

LED Investment:

Full Cost for 1 Fixture Installed. ( costs - discounts ) =

LED Maintenance Interval: Years @ $ per Visit. [ Lifetime ÷ Interval × Cost × Quan.= $Label ]

( $Label × Label ) + $Label = $Label

+ FIXED JOB COSTS $

= $Label Investment Label

Subtract a rebate from FIXED JOB COSTS, or, enter negative (-)JOB COSTS if rebate only.

LED energy costs and reduced CO₂ production during LED lifetime:

LED Life Hours ÷ Label Hours/Year = Label Years Lifetime

CO₂ reductions * calculator
Label Tons Less per year
Label Tons Less per lifetime

Years × $Label annual energy cost = $Label

Years × $Label annual energy savings = $Label (over original)

$Label invest. + $Label energy = $Label Project Cost

Original fixture lifetime maintenance and energy costs:

Original fixture life Hours ÷ Label Hours/Year = Label Years Lifetime

Years × $Label annual energy cost = $Label

Repair/Replacement Cost $ × Label = $Label

$Label Fixtures & Maint. + $Label energy = $Label Orig. Cost in LED Lifetime, replaced Label times.

Payback time and ROI with Amortized Cost + Interest: Label

% LabelLabel

Label

Payback

LED Investment ÷ Energy Savings

$Label ÷ $Label

= LabelLabel Years on energy alone

Investment ÷ ( Energy + Maint. Savings )

$Label ÷ $Label

= LabelLabel Years on energy & maint.

Simple ROI: (energy & maint. Payback – Investment ) ÷ Investment

= LabelLabel % ROI

RESTORE DEFAULT VALUES

^*US national average CO₂ emissions caused by various power generation capabilities, value provided by the US EPA.