Wire Calculator
Voltage drop, power loss, material selection, and custom diameter support
| ✓ | AWG | Ø mm | mm² | Ω/km | V drop | End V | Drop % | W used | Max A (drop) | Max A (thermal) |
|---|
✓ = voltage drop within tolerance · Round-trip resistance used (2 × one-way length) · W used = I²R loss in the wire · Max A = maximum current within tolerance at given length · End V = 0 V means the requested current is not supportable with that wire
Disclaimer: This calculator provides estimates for educational purposes only. Results are based on nominal material properties at ~20°C and do not account for real-world factors such as temperature rise, insulation type, installation method, bundling, or contact resistance.
Actual performance and safe current capacity can vary significantly depending on conditions and applicable standards (e.g. IEC, NEC). For critical or safety-related applications, consult a qualified electrician or engineer and follow local electrical codes.