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This free amp-to-wire-size calculator converts electrical load and run conditions into a recommended wire gauge (AWG), with supporting wire area and diameter outputs. You can input current, voltage, distance, conductor material, and allowable voltage drop to map amps to AWG. It is practical for...

Convert electrical units instantly with this free awg to amps converter. Includes reference tables, practical applica...
This free AWG reference tool provides wire gauge dimensions and typical current load ratings in amps across multiple ...
Cerrowire’s free ampacity calculator converts selected conductor size (AWG), wire type, and installation conditions i...
Southwire’s free voltage drop calculator helps determine proper AWG/KCMIL size using current, distance, and voltage c...
This free amp-to-wire-size calculator converts electrical load and run conditions into a recommended wire gauge (AWG)...
This free wire ampacity calculator lets you choose wire gauge and installation factors to get allowable current in am...
| Site | Description | Screenshot | Votes |
|---|---|---|---|
| Number Convert numberconvert.com | 8 | ||
| Engineering ToolBox engineeringtoolbox.com | 5 | ||
| Cerrowire |
Its Wire Gauge Calculator includes AWG-based diameter conversion in both inches and millimeters, plus cross-sectional area and resistance outputs. The page explains the AWG formulas and provides reference values, making it useful for both quick conversion and verification.
This AWG chart includes a row for 2 AWG with diameter, cross‑sectional area, resistance, and ampacity. It serves as a detailed lookup for #2 gauge wire data. ([electricaltechnology.org](https://www.electricaltechnology.org/2022/04/american-wire-gauge-awg-chart-wire-size-ampacity-table.html))
| 4 |
| Southwire southwire.com | 4 |
| Omni Calculator omnicalculator.com | 2 |
| Inch Calculator inchcalculator.com | 1 |
The skin depth calculator allows you to determine the skin effect in conductors for any signal frequency.
LED resistor calculator tells you what resistor you should use when connecting LEDs in series or parallel.