2.5 mm²: this page
- Input
- 2.5 mm2
- Expected output
- 13.2 AWG
Between 13 AWG (2.62 mm²) and 14 AWG (2.08 mm²).
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2.5 mm2 to awg
The cable is in mm² and the specification, manufacturer or American equipment asks for AWG. The conversion does not land on a whole number, and that is the difficulty: 2.5 mm² gives 13.2 AWG, between two real gauges. The tool opens with 2.5 mm² and shows the exact AWG, the two neighboring gauges with area and resistance, and the nearest standard metric size.
Between 13 AWG (2.62 mm²) and 14 AWG (2.08 mm²).
Near 17 AWG (1.04 mm²).
Between 15 and 16 AWG; 15 AWG is 1.65 mm².
11 AWG is 4.17 mm², slightly above.
Between 9 and 10 AWG.
7 AWG is 10.5 mm².
12 AWG has a cross-section of 3.31 mm² and a diameter of 2.053 mm. Copper resistance is about 5.21 Ω per kilometer at 20 °C.
About 13.2 AWG. Between 13 AWG, at 2.62 mm², and 14 AWG, at 2.08 mm². To avoid dropping below the cross-section, use 13 AWG.
Because the two scales were defined independently. Metric sizes follow a standardized series, while AWG follows a constant diameter factor of 92^(1/39) per gauge.
Many tables say so by approximation, but 14 AWG is 2.08 mm², about 17% less copper. The nearest in area without falling below is 13 AWG.
Compute d = √(4A ÷ π) and then n = 36 − 39 × ln(d ÷ 0.127) ÷ ln 92. The tool does this and also shows the copper resistance of the two neighboring gauges.
AWG and metric sizes are different scales: there is no exact equivalence. For installation cable, your project's cross-section and code are what count.
| AWG | Diameter (mm) | Area (mm²) | Ω/km |
|---|---|---|---|
| 13 | 1.828 | 2.624 | 6.571 |
| 14 | 1.628 | 2.081 | 8.286 |
The math runs in your browser; no value is sent to a server. The tool does not give current capacity (ampacity), which depends on the code and the installation.