Timing belt calculator
Enter pitch + pulley teeth + center distance → ratio, belt length, speed, teeth in mesh.
How to use
- Enter the calculation conditions
Enter the dimensions, loads, speeds or operating conditions requested by the form.
- Run the calculation
The tool applies the formulas shown on this page to the entered values.
- Review the result
Review the resulting specification and checks, then verify them against the cited source, current standard and real operating conditions before use.
Core formula
i = N₂/N₁; D = N · p / π
Example using default values
D₁ = 20 · 5 / π; D₂ = 40 · 5 / π → i = 2; D₁ = 31.8 mm; D₂ = 63.7 mm
Source: Gates / Mitsuboshi / Bando synchronous-belt design references.
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