"What is SWG & AWG? A Comprehensive Guide"
Although both AWG and SWG measure wire thickness, their numbering systems, applications, and origins differ significantly....
Understanding SWG and AWG: A Comprehensive Guide
In the world of electrical wiring and connections, two terms frequently pop up: SWG and AWG. While they might seem similar, they refer to different systems of measuring wire gauge, each with its unique history and application. Let's delve into the details of SWG and AWG, helping you understand these crucial concepts in electrical engineering.
What is SWG?
SWG, or Stands Winding Gauge, is a system used primarily in the United Kingdom and some of its former colonies to measure the gauge, or thickness, of copper wire. This system is based on the number of times a solid copper wire can be drawn through a die to reach the final diameter. The smaller the SWG number, the thicker the wire.
For instance, a 16 SWG wire is thicker than a 20 SWG wire. The SWG system is often used in applications where precise control over wire thickness is crucial, such as in the manufacture of electrical transformers and motors.
What is AWG?
AWG, or American Wire Gauge, is a standard used primarily in North America to measure the diameter of round, non-ferrous, electrically conducting wires. This system was developed in the early 19th century and is based on a complex mathematical formula that relates the gauge number to the wire's diameter.
In the AWG system, the gauge number increases as the wire's diameter decreases. This means that a 12 AWG wire is thicker than a 16 AWG wire. The AWG system is widely used in the United States and Canada for electrical wiring in buildings and homes.
SWG vs AWG: Key Differences
While both SWG and AWG are used to measure wire gauge, they have several key differences:
- Origin and Use: SWG is primarily used in the UK and its former colonies, while AWG is used in North America.
- Measurement Method: SWG is based on the number of times a wire can be drawn through a die, while AWG is based on a complex mathematical formula.
- Direction of Increase: In SWG, the gauge number decreases as the wire's diameter increases. In AWG, the gauge number increases as the wire's diameter decreases.
Conversion Between SWG and AWG
Due to the differences between the SWG and AWG systems, it's often necessary to convert between them. While there's no exact conversion formula due to the systems' different origins, several online tools and charts are available to help you convert SWG to AWG and vice versa.
For example, a 16 SWG wire is roughly equivalent to a 14 AWG wire, while a 20 SWG wire is roughly equivalent to an 18 AWG wire. However, these conversions are not exact and should be used as a guide rather than a precise measurement.
Why Understanding SWG and AWG Matters
Understanding the difference between SWG and AWG is crucial for anyone working with electrical wiring, whether you're a professional electrician or a DIY enthusiast. Using the wrong gauge of wire can lead to poor electrical performance, increased risk of fire, and even electrical shock.
By understanding the SWG and AWG systems, you can ensure that you're using the right wire for the job, helping to keep your electrical systems safe and efficient. Whether you're working with a 16 SWG or a 14 AWG wire, understanding the system behind the gauge number is key to successful electrical work.
<strong>American Wire Gauge (AWG) vs Standard Wire Gauge (SWG)</strong><p>Although both AWG and SWG measure wire thickness, their numbering systems, applications, and origins differ significantly.</p>
<strong>Can someone ELI5 the diff between SWG and AWG? - Reddit</strong><p>05.04.2026 ... SWG stands for Standard Wire Gauge. AWG stands for American Wire Gauge. SWG is British in origin and is slightly thicker than AWG at the same ...</p>
<strong>What is the difference between AWG and SWG? - Quora</strong><p>20.12.2022 ... What is the difference between AWG and SWG? All related (35). Recommended. Profile photo for Assistant. Assistant. Bot. · 8mo.</p>
<strong>Understanding Wire Gauge Charts: AWG, SWG, and IEC Standards ...</strong><p>16.06.2025 ... These three systems all measure wire thickness, but with different units of measurement. AWG and SWG use “gauge” numbers (smaller gauge = larger ...</p>
<strong>SWG vs AWG wire gauge systems - Blue Buddha Boutique</strong><p>SWG and AWG are wire gauge systems and are used to represent the thickness of the wire in jump rings. Different numbering systems are used, depending on the ...</p>
<strong>What do wire gauge and AWG, BWG, SWG mean? - Sunpack Energy</strong><p>12.06.2024 ... The British Standard Wire Gauge (commonly abbreviated to SWG or Standard Wire Gauge) was formerly utilized to indicate wire size according to BS ...</p>
<strong>AWG to SWG Conversion - ESR Electronic</strong><p>American Wire Gauge. (AWG). Size in Millimetres. (mmØ) ; 10, 2.588, (5.26mm²) ; 12, 2.053, (3.31mm²).</p>
<strong>Standard wire gauge - Wikipedia</strong><p>The British Standard Wire Gauge, often referred to as the Standard Wire Gauge or simply SWG, is a unit used to denote wire gauge (size) as defined by BS ...</p>
<strong>Wire Gauge Chart - Blog | BS Fixings</strong><p>SWG is a British standard while AWG is an American standard. SWG. British Standard Wire Gauge (SWG) is a set of wire sizes given by BS 3737:1964 (now withdrawn) ...</p>
<strong>What is the difference between swg and awg in chain maille?</strong><p>18.10.2022 ... SWG wires tend to bigger than AWG of the same gauge. The SWG system measures wires in inches, while the AWG measures them using the metric ...</p>
<strong>AWG-SWG Wire Gauge Comparison Table | Signi Aluminium</strong><p>19.02.2024 ... The table below illustrates the relationship between the British Standard Wire Gauge (SWG) and the American Wire Gauge (AWG).</p>
<strong>How Wire Gauge Sizes Work: AWG, SWG and IEC - JEM Electronics</strong><p>01.07.2019 ... The AWG is not universal. The British Imperial Standard Wire Gauge, the SWG, is the standard of measurement used in the UK. More popular is the ...</p>
<strong>Conductor Size conversation (AWG/SWG into mm - Tempsens</strong><p>21.05.2021 ... In cable conductor strand dimension Unit is in mm but cross sectional area or conductor size is given into Sqmm (mm2), AWG (American wire gauges) & SWG ( ...</p>
<strong>Understanding Wire Gauge Systems: AWG and SWG - LinkedIn</strong><p>03.08.2025 ... The Wire Gauge System is a standardized method used to specify the diameter (thickness) of wires. It is critical in electrical, electronic, ...</p>
<strong>Wire number (gauge) conversion tables - TR Fastenings</strong><p>SWG (mm), SWG (inches), (AWG or B&S) mm, (AWG or B&S) inches. 0000000 (7/0), 12.7, 0.5. 000000 (6/0), 11.7856, 0.464, 14.732, 0.58. 00000 (5/0), 10.9728, 0.432 ...</p>
<strong>Gauge or Gage | AWG or SWG | Resistance Wire</strong><p>11.07.2022 ... The SWG (Standard Wire Gauge) unit is typically not used in the resistance wire market. In the event you need to convert from SWG to AWG, you ...</p>
<strong>Converting SWG to AWG - Urban Maille</strong><p>23.03.2003 ... Ferrous metals are usually gauged in SWG. Precious metals are usually gauged like ours, in AWG. To use our rings with a maille pattern developed ...</p>
<strong>Wire Gauge Comparison Chart | PDF - Scribd</strong><p>The document compares wire gauge standards between the Standard Wire Gauge (SWG) and American Wire Gauge (AWG) systems.</p>
<strong>AWG and SWG Wire Gauges: Conversion to mm - Locker Wire Mesh</strong><p>A handy calculator to convert from or to AWG, SWG and Diameter. Also a quick look up table and background details for both standards.</p>
<strong>AWG vs SWG - Chain Reaction Canada</strong><p>AWG - American Wire Gauge SWG - Standard Wire Gauge Taken from Wikipedia: AWG - "American wire gauge (AWG), also known as the Brown & Sharpe wire gauge, ...</p>
