MM to AWG Calculator
Formula Used in mm to AWG Calculator
The formula to convert millimeter diameter to AWG is:
AWG = – (log₁₀ (mm ÷ 0.127)) ÷ log₁₀(92)
Where:
- ddd = diameter in mm
- 0.127 mm = diameter of 36 AWG wire
- 92 = constant base used in AWG standard
The formula uses a logarithmic scale. As the mm size increases, the AWG number decreases.
Table of Contents
What is the mm to AWG Conversion?
Wire size is important in textile machinery, especially in motor windings, power supply systems, and control panels. The mm to AWG calculator helps convert a wire diameter measured in millimeters to its equivalent American Wire Gauge (AWG). This calculator is useful for textile engineers who work with different wire standards.

AWG is a standard used mainly in North America. It shows wire size in a number format. A smaller AWG number means a thicker wire. A larger AWG number means a thinner wire.
Why Textile Engineers Use mm to AWG Conversion
Machine Wiring
Textile machines need proper wiring for motors, controllers, and sensors. Many European machines use wire sizes in millimeters. But many suppliers and standards mention AWG. So, a mm to AWG converter helps match the correct wire with the machine.
Import and Export
Textile engineers often buy machines or electrical parts from other countries. These may follow AWG or mm sizes depending on origin. Using a wire size calculator ensures accurate installation and prevents machine failure.
Maintenance and Repair
During machine repair, the replacement wire must match the original. If the wire chart is missing, measuring the diameter in mm and using the AWG calculator gives the correct replacement.
How the Calculator Works
- The user enters the diameter in millimeters.
- The calculator applies the formula.
- It shows the result as a rounded AWG number.
- The result helps select the correct wire.
Default Value
The default value in the calculator is 1.0 mm. It gives an AWG value close to 18. This is a common wire size used in textile machines for signal and control.
Benefits of Using the mm to AWG Calculator
Saves Time
- Engineers do not need to look at conversion charts.
- The calculator gives quick and correct results.
Improves Safety
- The wrong wire size may cause overheating or power loss.
- Using the right AWG size avoids machine damage.
Useful for Global Sourcing
- Textile engineers often work with suppliers from different countries.
- The calculator helps match mm and AWG wire sizes easily.
Who Should Use This Calculator?
Textile Engineers
Engineers who deal with machine setup, wiring, or automation can use it daily.
Electrical Engineers
Engineers who design or repair textile power systems benefit from accurate conversion.
Students and Technicians
This calculator helps learners understand the difference between mm and AWG standards.
Limitations of the mm to AWG Calculator
- It converts only solid round wires.
- For stranded wires, the value may not be exact.
- The result may not match local wire codes exactly.
Always confirm with your machine’s manual or industry standard before final use.
Related Wire Size Conversions
AWG to mm Calculator
This works in reverse. You input the AWG number, and it shows the size in mm.
mm² to AWG
This is used when the cross-sectional area (mm²) is known.
For example, a 1.5 mm² wire is close to 15 AWG.
Final Thoughts
The mm to AWG calculator is a practical tool. It helps textile professionals and others convert wire sizes accurately. It is quick, simple, and reliable. By entering the diameter in mm, you get the AWG size used in many countries.
Using this calculator improves accuracy, reduces risk, and helps with global sourcing. It is a must-have tool for any textile engineer working with machines, power systems, or automation.
