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Voltage Drop

Calculate Voltage Drop instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.

Voltage Drop

Current, A
Length, m
Cross-section, mm²
Voltage drop, V
6.72
Calculate Voltage Drop instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.

More about: Voltage Drop

What it calculates

The “Voltage Drop” calculator computes Voltage drop, V from 3 parameters: current, a, length, m, cross-section, mm².

Used in design, material estimation, and structural calculations.

Example calculation

With parameters Current, A = 16, Length, m = 30, Cross-section, mm² = 2.5 the result is 6.72.

How to use

  1. Enter the parameter values — every field above is adjustable with a slider.
  2. The result and related metrics are calculated automatically as you type.
  3. Use the additional metrics shown (if any) where needed.
  4. Copy the result or bookmark the page.

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