When to use this calculator
Find belt linear speed from pulley pitch diameter and rotational speed. Uses no-slip pitch-circle motion and ignores belt creep.
Explore the gears, belts & motion calculators for other questions in this topic. For a related calculation, use the Gear Centre Distance Calculator: Estimate standard centre distance for two external gears of the same module.
PUTTING IT INTO PRACTICE
Belt Linear Speed: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Pulley pitch diameter (mm) | 200 |
| Pulley speed (rpm) | 600 |
| Result | 6.283185 m/s |
- Check the input labels and enter the example values above.
- Apply the relationship: Belt speed = π × diameter/1000 × rpm/60.
- The result is 6.283185 m/s, rounded for display.
How to interpret your result
Uses no-slip pitch-circle motion and ignores belt creep.
Use compatible modules and effective pitch dimensions. No-slip and ideal-mesh assumptions omit losses and dynamics. A ratio calculation does not select a safe shaft, belt, bearing or gear rating.
Frequently asked questions
Why is a lead-screw lead different from its pitch?
Pitch is the axial distance between thread forms. A multi-start screw advances by pitch times the number of starts per revolution.
When is the belt linear speed calculator useful?
Find belt linear speed from pulley pitch diameter and rotational speed. Uses no-slip pitch-circle motion and ignores belt creep.
How do I use the belt linear speed calculator?
Enter pulley pitch diameter (mm), pulley speed (rpm). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Belt speed = π × diameter/1000 × rpm/60.
What should I check before using the result?
Uses no-slip pitch-circle motion and ignores belt creep.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
Calculators Map editorial process · Updated · Methods and limitations