Easily convert metal thicknesses from fractional inches to decimals or millimetres. This metal fraction to decimal chart helps ensure accurate measurements when ordering cut-to-size metal sheets.
Introduction
This metal fraction to decimal chart helps ensure accurate measurements when ordering cut-to-size metal sheets. Many metal thicknesses are given in fractions of an inch, but metric conversions are often required for precise cutting and fabrication. This guide provides a quick-reference metal fraction-to-decimal chart to help you convert fractions to decimals & inches to millimetres.
Metal Fraction to Decimal Conversion Chart
This handy chart converts imperial fractions to decimal inches and millimetres — ideal for metalworking, fabrication, and design.
Download our Fraction to Decimal & Millimetre Conversion Chart:
Use the metal fraction to decimal chart below to quickly convert between fractions, decimals, and millimeters when selecting your metal sheet thickness.
Metal Fraction to Decimal & MM Conversion Chart
| Fraction (inches) | Decimal (inches) | Millimeters (mm) |
|---|---|---|
| 1/64″ | 0.0156 | 0.3969 |
| 1/32″ | 0.0313 | 0.7938 |
| 3/64″ | 0.0469 | 1.1906 |
| 1/16″ | 0.0625 | 1.5875 |
| 5/64″ | 0.0781 | 1.9844 |
| 3/32″ | 0.0938 | 2.3813 |
| 7/64″ | 0.1094 | 2.7781 |
| 1/8″ | 0.1250 | 3.1750 |
| 9/64″ | 0.1406 | 3.5719 |
| 5/32″ | 0.1563 | 3.9688 |
| 11/64″ | 0.1719 | 4.3656 |
| 3/16″ | 0.1875 | 4.7625 |
| 13/64″ | 0.2031 | 5.1594 |
| 7/32″ | 0.2188 | 5.5563 |
| 15/64″ | 0.2344 | 5.9531 |
| 1/4″ | 0.2500 | 6.3500 |
| 17/64″ | 0.2656 | 6.7469 |
| 9/32″ | 0.2813 | 7.1438 |
| 19/64″ | 0.2969 | 7.5406 |
| 5/16″ | 0.3125 | 7.9375 |
| 21/64″ | 0.3281 | 8.3344 |
| 11/32″ | 0.3438 | 8.7313 |
| 23/64″ | 0.3594 | 9.1281 |
| 3/8″ | 0.3750 | 9.5250 |
| 25/64″ | 0.3906 | 9.9219 |
| 13/32″ | 0.4063 | 10.3188 |
| 27/64″ | 0.4219 | 10.7156 |
| 7/16″ | 0.4375 | 11.1125 |
| 29/64″ | 0.4531 | 11.5094 |
| 15/32″ | 0.4688 | 11.9063 |
| 31/64″ | 0.4844 | 12.3031 |
| 1/2″ | 0.5000 | 12.7000 |
| 63/64″ | 0.9844 | 25.0031 |
| 1″ | 1.0000 | 25.4000 |
Metal Fraction to Decimal Chart – Ordering Metal with Confidence
- Precision matters! Many metals are listed in fractional inches, but cutting tolerances often require decimal or metric values.
- Example: If you need a 2mm thick copper sheet but the listing shows 5/64″, use the chart to confirm that 5/64″ = 1.98mm, making it the closest match.
- Common Metal Thicknesses:
- Copper & Brass: Usually available in 1/16″ (1.5mm), 1/8″ (3mm), and 1/4″ (6mm) thicknesses.
- Aluminium: Comes in a variety of fractions and metric sizes.
- Stainless Steel: Typically sold in gauge, fractional inches, or millimeters.
Related Resources
For additional reference, explore the following resources to better understand metal thickness and gauge conversions:
Frequently Asked Questions (FAQ)
Q: What is a Metal Fraction to Decimal Chart Used For?
A: Metal thickness is often listed in fractions of an inch, but most manufacturers use millimeters for precision. Use this chart to convert between both units.
Q: How do I ensure I select the correct metal thickness for my project?
A: Always refer to the required material specifications and use this metal fraction to decimal chart to ensure accurate sizing before ordering cut-to-size metal sheets.
✅ Need Sheet Metal Cut to Size?
Now that you’ve found the right thickness, get your metal precision-cut by our team. We offer custom cutting for aluminium, copper, brass, stainless steel, and more.
