LED Conversion Savings Calculator vs LED Series Resistor Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
LED Conversion Savings Calculator
Calculate the annual electricity cost savings and CO₂ reduction you'll achieve by swapping incandescent or CFL bulbs for LEDs. Use it to justify the upfront cost of an LED retrofit.
- Answers
- Annual Savings ($)
- Inputs
- Current Bulb Wattage, Number of Bulbs, Daily Usage Hours, Electricity Rate, LED Efficiency Ratio
LED Series Resistor Calculator
Finds the correct series resistor value and power rating to safely drive one or more LEDs in series from a given supply voltage. Use it whenever you connect LEDs to a voltage source without a dedicated driver.
- Answers
- Series Resistance (Ω)
- Inputs
- Supply Voltage, LED Forward Voltage, LED Forward Current, Number of LEDs
At a glance
| LED Conversion Savings Calculator | LED Series Resistor Calculator | |
|---|---|---|
| Category | Electrical Home | Electrical |
| Answers | Annual Savings | Series Resistance |
| Inputs | 5 | 4 |
| Result unit | $ | Ω |
When to use each
Calculate the annual electricity cost savings and CO₂ reduction you'll achieve by swapping incandescent or CFL bulbs for LEDs. Use it to justify the upfront cost of an LED retrofit.
Finds the correct series resistor value and power rating to safely drive one or more LEDs in series from a given supply voltage. Use it whenever you connect LEDs to a voltage source without a dedicated driver.