Southwire Voltage Drop
Southwire Company Tools
Southwire Voltage Drop determines proper wire size for an electrical circuit.
- Rating
- 4.3
- 260 ratings
- Downloads
- 147K+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Aug 24
- 2026 · v3.2.5
Screenshots
About Southwire Voltage Drop
Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.
What’s new
Version 3.2.5 · Updated August 24, 2026
Analytics fix.
User reviews
Worked well
Quick answer for complicated math.
Very effective application
Very helpful
Just what is needed for quick field calculations for what size wire is needed to be pulled.
Great
Frequently asked questions
What does Southwire's voltage drop calculator do?
Southwire's voltage drop calculator helps determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity.
What factors does the voltage drop calculator consider?
The voltage drop calculator considers voltage drop limits, current carrying capacity, and NEC ampacity when sizing conductors.
What wire sizes does Southwire's Voltage Drop Calculator support?
Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.
Alternatives to Southwire Voltage Drop
Looking for apps like Southwire Voltage Drop? Here are 6 similar Android apps on Google Play. The highest rated is Southwire® Conduit Fill Calc (4.4/5), and all 6 are free to download.
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Southwire® Conduit Fill Calc 4.4
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Southwire Circuit
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MApp™ 3.1
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SIMpull 600V Calculator 3.1
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Southwire Partial Reel Calc 3.9
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Overhead Install Guide
| App | Rating | Price | Installs | Last updated | Compare |
|---|---|---|---|---|---|
| Southwire Voltage Drop | 4.3 / 5 | Free | 100,000+ | Aug 24, 2026 | |
| Southwire® Conduit Fill Calc | 4.4 / 5 | Free | 100,000+ | Jun 15, 2026 | Compare |
| Southwire Circuit | – | Free | 5,000+ | Aug 26, 2025 | Compare |
| MApp™ | 3.1 / 5 | Free | 5,000+ | Aug 12, 2025 | Compare |
| SIMpull 600V Calculator | 3.1 / 5 | Free | 10,000+ | Jul 21, 2026 | Compare |
| Southwire Partial Reel Calc | 3.9 / 5 | Free | 10,000+ | Jul 15, 2026 | Compare |
| Overhead Install Guide | – | Free | 500+ | Aug 25, 2026 | Compare |