**Use this Standard Wire Gauge (SWG) to millimeter (mm) calculatorfor converting between two different systems of measuring wire thickness. **

This conversion helps professionals and hobbyists in various fields, including **electrical engineering**, **jewelry making**, and **metalworking**, to quickly and accurately convert SWG measurements to their equivalent millimeter values.

## SWG to mm Calculator

SWG | mm |
---|---|

4 | 5.89 |

6 | 4.88 |

8 | 4.06 |

10 | 3.25 |

14 | 2.03 |

20 | 0.914 |

23 | 0.610 |

**4 SWG to mm**4 SWG is equivalent to**5.89 mm****6 SWG to mm**6 SWG is equivalent to**4.88 mm****8 SWG to mm**8 SWG is equivalent to**4.06 mm****10 SWG to mm**10 SWG is equivalent to**3.25 mm****14 SWG to mm**14 SWG is equivalent to**2.03 mm****20 SWG to mm**20 SWG is equivalent to**0.914 mm****23 SWG to mm**23 SWG is equivalent to**0.610 mm**

**More Calculator : – **

- AWG to MM2 Calculator
- Raised Bed Soil Calculator
- Garden Room Cost Calculator
- Working Load Limit Calculator
- Vinyl Fence Price Calculator
- Vinyl Siding Price Calculator
- Bending Stress Calculator

## SWG to mm conversion Formula

The conversion from SWG to mm uses the following formula:

**mm ≈ 0.3048 × (50 – SWG) / 16**

The SWG system, primarily used in the **United Kingdom** and some Commonwealth countries, assigns numbers to wire diameters.

In contrast, the metric system uses millimeters for precise measurements.

An **SWG to mm converter** bridges this gap, allowing for seamless conversion between these two measurement standards.

## What is SWG thickness?

**SWG thickness** refers to the diameter of a wire or sheet metal as measured using the Standard Wire Gauge system.

This system was established in the **19th century** and has been widely used in the UK and other countries for specifying the thickness of wires, metal sheets, and other materials.

In the SWG system, thickness is denoted by a **number**, typically ranging from 0 to 36, with some gauges extending to 50 or higher for extremely thin wires.

The **lower the SWG number**, the thicker the wire or sheet. For example:

- SWG 0 corresponds to a thickness of about 0.324 inches (8.23 mm)
- SWG 36 corresponds to a thickness of about 0.005 inches (0.13 mm)

SWG thickness measurements are commonly used in various industries, including:

**Electrical wiring**: For determining the current-carrying capacity of wires**Jewelry making**: To specify the thickness of metal wires and sheets**Sheet metal work**: In construction and manufacturing**Musical instrument strings**: Particularly for stringed instruments

## What is 1.65 mm in SWG?

**1.65 mm is approximately equivalent to 16 SWG**

- 15 SWG = 1.83 mm
- 16 SWG = 1.63 mm

As we can see, 16 SWG (1.63 mm) is the closest match to 1.65 mm, with only a **0.02 mm difference**. This small variance is often acceptable in many practical applications.