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AWG Wire Gauge Converter

Unit Converters

AWG to mm², diameter, ampacity

Quick Answer

AWG Wire Gauge Converter: AWG to mm², diameter, ampacity. AWG Wire Gauge Converter uses standard unit conversion formulas to compute accurate results instantly.

Nearest AWG18
Diameter1.024mm
Cross-section0.823mm²
Est. ampacity (copper, in conduit)4A
Resistance20.90mΩ/m
Voltage drop (round trip)2.09V
Drop @220V0.95%
Power loss10.45W

Calculation steps

  1. 1Diameter: d = 0.127 × 92^((36−18)/39) = 1.024 mm
  2. 2Cross-section: A = πd²/4 = 0.823 mm²; ampacity ≈ 5 A/mm² → 4 A (conservative, in conduit)
  3. 3Resistance: R = ρ/A = 0.0172 ÷ 0.823 = 20.90 mΩ/m
  4. 4Round-trip drop: V = I × R × 2L = 5 × 20.90mΩ × 20 = 2.09 V (0.95% of 220V)

AWG quick chart

AWGDiameter (mm)Area (mm²)Ampacity (A)
102.5885.26126
122.0533.30917
141.6282.08110
161.2911.3097
181.0240.8234
200.8120.5183
220.6440.3262
240.5110.2051
260.4050.1291
280.3210.0810
300.2550.0510
Every 3 AWG steps halves/doubles the cross-section. Ampacity shown is a conservative 5 A/mm² for copper in conduit — free-air wiring allows ~2×. Voltage drop above 3% (220V) or 5% (12V systems) means you should thicken the wire.

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How to Use

  1. Pick units: switch source and target units in the AWG Wire Gauge Converter.
  2. Enter a value: results sync both ways instantly — no convert button needed.
  3. Use the reference table: common conversions are listed for instant lookup.
  4. Copy the result: copy the converted value with its unit.

Key Points

  • AWG Wire Gauge Converter is a free online unit conversion tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: AWG to mm², diameter, ampacity.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

AWG Wire Gauge Converter formula

AWG Wire Gauge Converter uses standard unit conversion formulas to compute accurate results instantly.

FAQ

How do I use the AWG Wire Gauge Converter?
Open the page and fill in the input fields — results update automatically. AWG to mm², diameter, ampacity.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on SI conversion factors and international standards. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. AWG Wire Gauge Converter[EB/OL]. https://www.yijiansuan.com/en/c/convert/awg-wire

Results provided by this tool are for reference only and do not constitute professional advice.