Voltage Drop Calculator
Calculate voltage drop, percent, and power loss for a conductor (AWG or mm²). Copper & Aluminum supported.
Copper resistivity used: 1.724×10⁻⁸ Ω·m (20°C)
Notes:
- Formula: R = ρ × L / A. (L = conductor length in metres, A = area in m²).
- Voltage drop V = I × R (for DC or magnitude for AC).
- Power loss = I² × R.
- AWG → mm² values are approximate standard conversions.