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
Capacitive Reactance Calculator
Calculates capacitive reactance (Xc) for a capacitor in an AC circuit at a given frequency. Used by engineers and students analyzing filters, coupling networks, tuned circuits, and impedance matching.
Fill in the required fields to see your result.
Key differences
| LED Series Resistor Calculator | Capacitive Reactance Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 4 | 2 |
| Result | Series Resistance (Ω) | Capacitive 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 capacitive reactance (Xc) for a capacitor in an AC circuit at a given frequency. Used by engineers and students analyzing filters, coupling networks, tuned circuits, and impedance matching. |