Gear Diameter Calculator
Calculate gear pitch diameter from module or diametral pitch and tooth count.
Enter your values
Use the units shown and enter valid values.
Calculation Result
Results are calculated from your inputs.
How It Works
Calculate gear pitch diameter from module or diametral pitch and tooth count.
Use the result as an engineering calculation aid and verify critical designs against applicable standards and manufacturer specifications.
How to use this calculator
What to enter
Enter or select the following as requested: Number of teeth; Gear sizing system; Module or diametral pitch; Diameter result unit. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The engineering result is calculated from the dimensions, loads, material properties, flow conditions, or operating values entered. Check the unit system, material assumptions, boundary conditions, safety factor, and whether the model represents static, dynamic, or ideal conditions.
When to use it
Use this for preliminary engineering calculations or to check a worked problem. Verify assumptions and applicable design standards with a qualified engineer before using the result to design, size, or operate load-bearing or safety-critical equipment.