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Voltage Drop Calculator

Estimate voltage drop in a wire run (DC/single-phase and three-phase).

DC / 1φ Vdrop = I × 2R
3φ Vdrop = √3 × I × R
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Voltage Drop Calculator

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How to use

Follow these steps for a clear answer.

1

Enter the known values

Fill in the fields for your calculation.

2

Choose a mode if available

Use the tabs when multiple directions are offered.

3

Read the result

The result updates as you type.

Frequently asked questions

Key distinctions behind the calculation.

How does the Voltage Drop calculation work?

It uses the formula Vdrop = I × 2R.