Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical
Voltage Drop Calculator
Computes the voltage drop across a wire run given current, one-way distance, wire gauge, and conductor material. Essential for ensuring devices receive adequate voltage at the end of long cable runs.
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
| Voltage Drop Calculator | LED Resistor Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 4 | 3 |
| Result | Voltage Drop (V) | Resistor Value (Ω) |
| What it does | Computes the voltage drop across a wire run given current, one-way distance, wire gauge, and conductor material. Essential for ensuring devices receive adequate voltage at the end of long cable runs. | 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. |