Gauge to MM Converter
Convert common stainless steel sheet gauge values into millimeters and inches before confirming a purchase specification.
Technical Calculator
Gauge to MM Converter
This gauge to millimeter converter provides a practical thickness reference for stainless steel sheet purchasing and fabrication.
This gauge to mm converter helps buyers and fabricators convert common stainless steel sheet gauge values into millimeters and inches. Gauge references can vary by material and standard, so use this page as a purchasing reference and confirm final thickness on the drawing or purchase order.
Gauge to mm converter
Enter the requested dimensions below. All dimensions are metric.
Calculation Result
The result is a theoretical planning estimate. Confirm the actual production and shipment weight before ordering.
- Automatic input validation
- Metric dimensions and density
- Order quantity total
Reference: New Source Corporation stainless steel gauge chart, page 2. Conversion: NIST, 1 inch = 25.4 mm exactly. Gauge tables are material-specific nominal references; confirm the contractual thickness and tolerance. The mm column is recalculated from the source inch values, so it can differ from the source’s truncated mm column. Table and conversions checked on 2026-09-04.
Calculation Method
Formula and Worked Example
Formula
Inches = millimeters / 25.4. Gauge itself is a reference table rather than a linear formula, so always confirm the required millimeter thickness on the purchase order.
Quote Use
Common stainless steel gauge chart
| Gauge | Millimeters | Inches |
|---|---|---|
| 10 | 3.5717 | 0.14062 |
| 12 | 2.7780 | 0.10937 |
| 14 | 1.9842 | 0.07812 |
| 16 | 1.5875 | 0.06250 |
| 18 | 1.2700 | 0.05000 |
| 20 | 0.9525 | 0.03750 |
| 22 | 0.7937 | 0.03125 |
| 24 | 0.6350 | 0.02500 |
| 26 | 0.4762 | 0.01875 |
Weight Notes
How to use gauge in purchasing
Gauge is convenient in conversation, but millimeters are clearer for international stainless steel purchasing. A buyer may say 16 gauge, while the drawing, mill tolerance, and supplier stock list may use millimeter thickness. To avoid mistakes, convert the gauge to millimeters and write the millimeter value directly into the inquiry or purchase order.
For stainless steel sheet and coil, the thickness affects weight, price, forming behavior, stiffness, and freight cost. After converting gauge to millimeters, use the sheet or coil weight calculator to estimate total material weight. This makes it easier to compare options such as 18 gauge versus 16 gauge before requesting a quote.
Request for Quotation
Send Your Stainless Steel Requirement
Use the converted thickness as a reference, then send the exact material type, grade, size, quantity, surface finish, application, and destination country for a formal quotation.
Frequently Asked Questions
Frequently Asked Questions
No. Gauge values vary by material and standard, so confirm the millimeter thickness for stainless steel.
For clear purchasing, specify millimeters and tolerance on the purchase order.