Gauge to MM
Precision Converter

Gauge to MM Calculator

Convert Wire & Sheet Metal Gauge to Millimeters instantly.

Decimals
3

Standard for electrical wire diameters (solid, non-ferrous).

ga

Enter a gauge number (0-36).

mm

Millimeters equivalent.

Inches — "

How Gauge to MM Calculator Works

This calculator functions in real-time to convert standardized gauge numbers into metric millimeters (mm). Because "Gauge" can refer to different materials (wire vs. sheet metal), our tool allows you to select the specific material system to ensure accuracy.

Understanding Gauge Systems

  • AWG (American Wire Gauge): A logarithmic stepped wire gauge system used primarily in North America for electrically conducting wire. As the gauge number increases, the wire diameter decreases.
  • Sheet Metal Gauge: A non-linear standard based on weight per square foot. It differs by material (Steel, Galvanized, Stainless, Aluminum). For example, 14 gauge Steel is not the same thickness as 14 gauge Aluminum.

Common Conversions

Gauge AWG (Wire) Steel (Sheet)
10 ga2.588 mm3.416 mm
14 ga1.628 mm1.897 mm
18 ga1.024 mm1.214 mm
20 ga0.812 mm0.912 mm
24 ga0.511 mm0.607 mm

Frequently Asked Questions

How much is 1 gauge in mm? ▾
For American Wire Gauge (AWG), 1 Gauge is approximately 7.348 mm. If you are measuring Standard Steel Sheet, 1 Gauge is roughly 7.178 mm.
What is 14 gauge in mm? ▾
14 Gauge is a very common size. In AWG (Wire), it is 1.628 mm. In Standard Steel (Sheet Metal), 14 Gauge is thicker at 1.897 mm.
What is 20 gauge thickness in mm? ▾
20 Gauge AWG (Wire) is 0.812 mm. For Standard Steel Sheet, it is 0.912 mm. For Stainless Steel, it is roughly 0.953 mm.
What is 24 gauge in mm? ▾
In AWG (Wire), 24 Gauge is 0.511 mm. For Standard Steel Sheet, 24 Gauge is approximately 0.607 mm.