Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical
Conduit Fill Calculator
Calculate the percentage of a conduit's interior cross-sectional area occupied by wires and check it against NEC fill limits. Use this when planning new conduit runs or adding conductors to existing conduit.
Fill in the required fields to see your result.
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.
Key differences
| Conduit Fill Calculator | LED Resistor Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 3 | 3 |
| Result | Conduit Fill (%) | Resistor Value (Ω) |
| What it does | Calculate the percentage of a conduit's interior cross-sectional area occupied by wires and check it against NEC fill limits. Use this when planning new conduit runs or adding conductors to existing conduit. | 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. |