Calculator
Voltage Drop Calculator
Change the inputs to match your equipment. Results update automatically.
Formula
Three-phase: dV = (sqrt(3) x I x L x rho) / SSingle-phase: dV = (2 x I x L x rho) / SYüzde Düşüm: %e = (dV / V) x 100 Worked example
A balanced three-phase line at 32 A, 50 m, 10 mm² and ρ = 0.0175 Ω·mm²/m gives ΔU ≈ 4.85 V, or 1.21% of 400 V.
Scope and interpretation
Length is the one-way route length. This simplified model omits reactance and temperature variation; it is not a complete AC cable design.