What AWG do I need for a 20-amp circuit?

1-3 sentence answer grounded in the material

Can I use aluminum wire for a 30-amp circuit?

1-3 sentence answer grounded in the material

How does distance affect the AWG I need?

1-3 sentence answer grounded in the material

What is the difference between ampacity and voltage drop?

1-3 sentence answer grounded in the material

Do these calculators replace a licensed electrician?

1-3 sentence answer grounded in the material

Electrical6 options compared

Awg to Amps Electrical Converter

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 wiring design decisions and quick sizing checks.

Editors’ Top PickBased on community votes

Number Convert

numberconvert.com

Convert electrical units instantly with this free awg to amps converter. Includes reference tables, practical applica...

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Other OptionsRanked by votes

02
02
Engineering ToolBox
engineeringtoolbox.com
This free AWG reference tool provides wire gauge dimensions and typical current load ratings in amps across multiple ...
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03
03
Cerrowire
cerrowire.com
Cerrowire’s free ampacity calculator converts selected conductor size (AWG), wire type, and installation conditions i...
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04
04
Southwire
southwire.com
Southwire’s free voltage drop calculator helps determine proper AWG/KCMIL size using current, distance, and voltage c...
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05
05
Omni Calculator
omnicalculator.com
This free amp-to-wire-size calculator converts electrical load and run conditions into a recommended wire gauge (AWG)...
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06
06
Inch Calculator
inchcalculator.com
This free wire ampacity calculator lets you choose wire gauge and installation factors to get allowable current in am...
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Side by side

Awg to Amps Electrical Converter options compared

Tool	Best for	Strengths	Limitations
Omni Calculator omnicalculator.com	Wiring design with distance and voltage drop	Inputs current, voltage, distance, material, and voltage drop Outputs recommended AWG plus wire area and diameter	Results are only a guide, not a code-compliant guarantee
Number Convert numberconvert.com	Quick bidirectional AWG-to-amps reference	Includes reference tables and practical applications for electronics and wiring Bidirectional conversion between AWG and amps	No distance, voltage drop, or voltage inputs; ampacity values based on NEC Table 310.16 only
Engineering ToolBox engineeringtoolbox.com	Technical AWG dimension and current rating lookup	Provides wire gauge dimensions and typical current load ratings across multiple conductor conditions Useful for quick gauge/current comparisons without form-based inputs	Lookup-table format; no interactive calculator for custom run conditions
Cerrowire cerrowire.com	Real-world conductor sizing with NEC methodology	Built around NEC methodology with practical field parameters like wire type and installation conditions Direct AWG-to-amps workflow for conductor sizing checks	Focused on ampacity calculation; less useful if you need voltage drop or distance inputs
Southwire southwire.com	Voltage-drop-aware wire sizing for installation planning	Helps determine proper AWG/KCMIL size using current, distance, and voltage constraints Checks against ampacity limits for code-aware sizing decisions	Designed for AWG and KCMIL sizes only; commercial user mode requires professional expertise
Inch Calculator inchcalculator.com	NEC-based ampacity lookup with installation factor adjustments	Lets you choose wire gauge, material, temperature rating, ambient temperature, and conductor count for allowable current Includes ampacity chart references for common gauges	No distance or voltage drop inputs; focused on ampacity, not voltage drop calculation

Buyer's guide

How to choose a awg to amps electrical converter

When picking a tool for this task, first decide whether you need to size wire for a specific run (current, distance, voltage drop) or just look up ampacity for a given gauge. If you are planning a real installation, you will care about conductor material, distance, and allowable voltage drop, because these affect the recommended AWG and safety margin. If you only need a quick reference or are comparing standard gauge ratings, a lookup table may be enough. The differences that matter are the input fields available (current, voltage, distance, material, voltage drop) and whether the tool outputs a recommended AWG or just an ampacity number.

Questions

Awg to Amps Electrical Converter FAQ

What AWG do I need for a 20-amp circuit?: 1-3 sentence answer grounded in the material
Can I use aluminum wire for a 30-amp circuit?: 1-3 sentence answer grounded in the material
How does distance affect the AWG I need?: 1-3 sentence answer grounded in the material
What is the difference between ampacity and voltage drop?: 1-3 sentence answer grounded in the material
Do these calculators replace a licensed electrician?: 1-3 sentence answer grounded in the material

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