SWG to MM Wire Converter
Professional Gauge & Cross-Section Area Calculator
Technical Conversion Formula
Standard Wire Gauge is based on a geometric progression. To calculate the diameter (d) in mm for a given gauge (n):
Full SWG to MM Reference Table
| SWG | mm | SWG | mm | SWG | mm |
|---|---|---|---|---|---|
| 8 | 4.064 | 18 | 1.219 | 28 | 0.376 |
| 10 | 3.251 | 20 | 0.914 | 30 | 0.315 |
| 12 | 2.642 | 22 | 0.711 | 32 | 0.274 |
| 14 | 2.032 | 24 | 0.559 | 34 | 0.234 |
| 16 | 1.626 | 26 | 0.457 | 36 | 0.193 |
Heating Element Design FAQ
How does wire gauge affect heating performance?
Lower SWG numbers indicate thicker wires. Thicker wires have lower resistance and higher current-carrying capacity, making them suitable for high-wattage industrial heaters.
What is the difference between SWG and AWG?
SWG (Standard Wire Gauge) is the British imperial standard used in India. AWG (American Wire Gauge) is the US standard. A 14 SWG wire (2.03mm) is NOT the same as a 14 AWG wire (1.63mm).
Why is Cross-Sectional Area (mm²) important?
The area determines the current density (Amps/mm²). For long-lasting heating elements, engineers must ensure the current density stays within safe limits for the specific alloy (Nichrome/Kanthal).
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Technical Data provided for engineering reference. Verify with a micrometer before production.