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
Calculate the percentage of conduit fill for a given wire gauge, wire count, and conduit size to ensure NEC compliance. Use this before pulling wire to avoid overheating and code violations.
Fill in the required fields to see your result.
Key differences
| LED Resistor Calculator | Conduit Fill Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 3 | 3 |
| Result | Resistor Value (Ω) | Conduit Fill Percentage (%) |
| 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. | Calculate the percentage of conduit fill for a given wire gauge, wire count, and conduit size to ensure NEC compliance. Use this before pulling wire to avoid overheating and code violations. |