Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical
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.
Fill in the required fields to see your result.
Electrical
Inductive Reactance Calculator
Calculates inductive reactance (XL) for a coil or inductor in an AC circuit at a given frequency. Used in RF design, transformer analysis, filter circuit development, and motor analysis.
Fill in the required fields to see your result.
Key differences
| LED Series Resistor Calculator | Inductive Reactance Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 4 | 2 |
| Result | Series Resistance (Ω) | Inductive Reactance (Ω) |
| What it does | 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. | Calculates inductive reactance (XL) for a coil or inductor in an AC circuit at a given frequency. Used in RF design, transformer analysis, filter circuit development, and motor analysis. |