Circular pitch to module
Type a value in CP (mm) to get it in m instantly.
3.183m
That's 1.27× as coarse as a car gearbox, while a truck final drive is 1.88× coarser. A 20-tooth gear of this size would be 63.66 mm across.
Convert the other way: m to CP (mm)
What it means
How big are those teeth?
Module and pitch describe tooth size only. Gears also need the same pressure angle, usually 20°, before they will run together.
The math
How to convert CP (mm) to m
To convert circular pitch to module, multiply by 0.31831.
Example: 10 CP (mm) × 0.31831 = 3.1831 m.
In the other direction, 1 m = 3.14159 CP (mm).
Every unit
Your tooth size in every unit
Tables
CP (mm) to m conversion table
| CP (mm) | m |
|---|---|
| 0.5 CP (mm) | 0.159155 m |
| 0.8 CP (mm) | 0.254648 m |
| 1 CP (mm) | 0.31831 m |
| 1.25 CP (mm) | 0.397887 m |
| 1.5 CP (mm) | 0.477465 m |
| 2 CP (mm) | 0.63662 m |
| 2.5 CP (mm) | 0.795775 m |
| 3 CP (mm) | 0.95493 m |
| 4 CP (mm) | 1.27324 m |
| 5 CP (mm) | 1.59155 m |
| 6 CP (mm) | 1.90986 m |
| 8 CP (mm) | 2.54648 m |
| 10 CP (mm) | 3.1831 m |
m to CP (mm) conversion table
| m | CP (mm) |
|---|---|
| 0.5 m | 1.5708 CP (mm) |
| 0.8 m | 2.51327 CP (mm) |
| 1 m | 3.14159 CP (mm) |
| 1.25 m | 3.92699 CP (mm) |
| 1.5 m | 4.71239 CP (mm) |
| 2 m | 6.28319 CP (mm) |
| 2.5 m | 7.85398 CP (mm) |
| 3 m | 9.42478 CP (mm) |
| 4 m | 12.5664 CP (mm) |
| 5 m | 15.708 CP (mm) |
| 6 m | 18.8496 CP (mm) |
| 8 m | 25.1327 CP (mm) |
| 10 m | 31.4159 CP (mm) |
Quick answers
Quick answers
- How many m is 1 CP (mm)?
- 1 CP (mm) is 0.31831 m.
- How many m is 10 CP (mm)?
- 10 CP (mm) is 3.1831 m.
The units
About these units
Circular pitch (CP (mm))
The distance from one tooth to the next around the pitch circle.
Module (m)
Millimeters of pitch diameter per tooth, the metric standard.
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