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
Wire Gauge & Ampacity Calculator
Determine the minimum wire cross-sectional area (in mm²) needed to safely carry a given current over a set distance without exceeding your allowed voltage drop. Essential for wiring solar systems, EV chargers, and long cable runs.
Fill in the required fields to see your result.
Key differences
| LED Series Resistor Calculator | Wire Gauge & Ampacity Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 4 | 5 |
| Result | Series Resistance (Ω) | Minimum Wire Cross-Section (mm²) |
| 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. | Determine the minimum wire cross-sectional area (in mm²) needed to safely carry a given current over a set distance without exceeding your allowed voltage drop. Essential for wiring solar systems, EV chargers, and long cable runs. |