How it works
Resistance = resistivity × length × path multiplier ÷ cross-sectional area.
Input definitions
- Resistivity (Ω·mm²/m)
- Enter the value in the labeled unit.
- Conductor length (m)
- Enter the value in the labeled unit.
- Cross-sectional area (mm²)
- Enter the value in the labeled unit.
- Current-carrying path multiplier
- Enter the value in the labeled unit.
A worked example
- Resistivity (Ω·mm²/m)
- 0.0175
- Conductor length (m)
- 20
- Cross-sectional area (mm²)
- 2.5
- Current-carrying path multiplier
- 2
Assumptions & limits
Uses only the values entered. Rates are illustrative inputs, not live quotes, legal rules or personalised advice. Check provider terms, local requirements and measurements before acting.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-19. Content checked against the stated method and examples. Our verification approach.
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Common questions
Why use a path multiplier of two for DC loads?
A simple two-wire circuit has an outgoing and return conductor, so total conductor length is twice the one-way run.
How does Wire resistance from length and area calculate the result?
Resistance = resistivity × length × path multiplier ÷ cross-sectional area.
What should I verify before using Wire resistance from length and area?
Uses only the values entered. Rates are illustrative inputs, not live quotes, legal rules or personalised advice. Check provider terms, local requirements and measurements before acting.