LED Savings Calculator
Compare lighting energy costs over your chosen operating hours.
Formula
saved kWh = (old W − LED W) × lamps × hours / 1000
Old watts per lamp: 60 W · LED watts per lamp: 10 W · Energy saved (kWh) ≈ ((60 W)-(10 W))×(10)×(1,000)÷1000 · Cost saved ≈ (500)×(0.2)
How to use
- Enter old and replacement watts per lamp.
- Set lamp count, total hours and your rate per kWh.
- Read energy and cost savings for that period.
Examples
- Ten 60 W lamps replaced by 10 W LEDs save 500 kWh over 1000 h.
Frequently asked questions
Are the lamps equally bright?
Compare products with similar lumens and suitable light quality.
Is purchase cost included?
No. This compares electricity only, excluding replacement and maintenance.
What do negative savings mean?
The replacement uses more energy. Rates are entered examples, not a tariff lookup.
Sources
Updated: