Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical
LED Resistor Calculator
Calculate the exact current-limiting resistor value needed to safely power an LED from any supply voltage. Use this whenever wiring LEDs to avoid burning them out from excess current.
Fill in the required fields to see your result.
Electrical
Conduit Fill Calculator
Determines the minimum conduit diameter needed for a given number and gauge of wires per NEC fill rules. Use it when planning new electrical runs to avoid code violations and overheating.
Fill in the required fields to see your result.
Key differences
| LED Resistor Calculator | Conduit Fill Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 3 | 2 |
| Result | Resistor Value (Ω) | Minimum Conduit Size (inch) |
| What it does | Calculate the exact current-limiting resistor value needed to safely power an LED from any supply voltage. Use this whenever wiring LEDs to avoid burning them out from excess current. | Determines the minimum conduit diameter needed for a given number and gauge of wires per NEC fill rules. Use it when planning new electrical runs to avoid code violations and overheating. |