Voltage Drop Calculator
Conductor voltage drop at 20 °C. Informational, not a code table.
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How to use voltage drop calculator
- Fill the fields or paste input in this tab.
- Set every option that changes the result, not only the defaults.
- Read the output. Invalid input shows an error in the status line.
- Copy or download the result. Nothing is sent to CZNull.
Voltage Drop Calculator
Voltage Drop Calculator
| Where it runs | This browser |
|---|---|
| Upload | None |
| Network | No request to compute the result |
| Limit | Invalid input stays on the page as an error |
What voltage drop calculator does
R = ρL/A. Copper ρ = 1.724e-8 Ω·m. Aluminum 2.650e-8. DC/1-ph uses round-trip length. 3-ph uses √3 × one-way R.
How this page works
All options on the form are sent into the local engine. Conductor voltage drop at 20 °C. Informational, not a code table. Results never leave this device to be computed.
Limits and related pages
Stay on this URL for this job. Sibling tools in the same group cover nearby jobs without mixing formulas. Open the category hub if you need a different input set.
Questions
Does this page upload what I type?
No. The work runs in the page you opened. CZNull does not receive the input.
Is this wiring or medical advice?
No. The page applies a published formula to the numbers you type. Confirm with a qualified person where it binds you.
What temperature is voltage drop?
Conductor resistivity is at 20 degrees Celsius. Real cable temperature changes resistance.
DC versus AC?
Watts to amps uses I = P/V for DC, divides by power factor for single-phase AC, and by root 3 times V times PF for three-phase.