LED Bulb Savings Calculator
Fill in the values and the answer updates as you type.
How the LED Bulb Savings Calculator 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 $279.22.
Inputs and results
The LED Bulb Savings Calculator takes 6 inputs and gives 5 results.
What you enter
- Number of bulbs — starts at 20.
- Old bulb power (W) — starts at 60.
- LED power (W) — starts at 9.
- Hours on per day (h) — starts at 5.
- Electricity price ($/kWh) — starts at 0.15.
- Price per LED bulb ($) — starts at 3.
What you get
- Annual savings
- Energy saved per year (kWh)
- Cost of LED bulbs
- Payback time (months)
- 10-year net savings
Example: LED Bulb Savings Calculator with the starting values
With number of bulbs 20, old bulb power 60 W, led power 9 W, hours on per day 5 h and electricity price 0.15 $/kWh, the calculator returns:
| Annual savings | $279.22 |
|---|---|
| Energy saved per year (kWh) | 1,862 |
| Cost of LED bulbs | $60 |
| Payback time (months) | 2.6 |
| 10-year net savings | $2,732.25 |
Change any value above and the results update straight away.
LED Bulb Savings Calculator FAQ
How do I use the LED Bulb Savings Calculator?
Enter number of bulbs, old bulb power, led power and hours on per day in the fields, then read annual savings, energy saved per year (kwh), cost of led bulbs and payback time (months) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the LED Bulb Savings Calculator calculate?
Savings from replacing old bulbs with LEDs. It returns annual savings, energy saved per year (kwh), cost of led bulbs and payback time (months) from the 6 values you provide.
What values does the LED Bulb Savings Calculator start with?
It opens with number of bulbs 20, old bulb power 60 W, led power 9 W and hours on per day 5 h so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the LED Bulb Savings Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the LED Bulb Savings Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.