Belt Length Calculator
Open-belt length between two pulleys.
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Introduction
Belt Length Calculator — Open-belt length between two pulleys. Enter Pulley 1 diameter (m), Pulley 2 diameter (m), Center distance (m) to get an instant, accurate result.
Formula
Open-belt approximation: L = 2C + (π/2)(d1+d2) + (d2−d1)²/(4C), where C is the center distance between pulleys.
Step-by-step
- Enter the Pulley 1 diameter (m).
- Enter the Pulley 2 diameter (m).
- Enter the Center distance (m).
- Click Calculate to see your result instantly.
Real-world example
Example: With Pulley 1 diameter (m) = 0.1, Pulley 2 diameter (m) = 0.2, Center distance (m) = 0.5, the Belt Length Calculator gives Belt Length M: 1.4762.
Frequently Asked Questions
Does this work for crossed belts?
No, this formula is for an open (non-crossed) belt configuration.
What if both pulleys are the same size?
The last term drops to zero and the formula simplifies to 2C + πd.
What inputs does the Belt Length Calculator need?
You'll need to provide: Pulley 1 diameter (m), Pulley 2 diameter (m), Center distance (m). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Belt Length Calculator?
The Belt Length Calculator applies the formula exactly as calculated — Open-belt approximation: L = 2C + (π/2)(d1+d2) + (d2−d1)²/(4C), where C is the center distance between pulleys. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Belt Length Calculator free to use?
Yes, the Belt Length Calculator is completely free, requires no signup, and runs instantly in your browser.
About the Belt Length Calculator
The Belt Length Calculator uses a real, verifiable formula — Open-belt approximation: L = 2C + (π/2)(d1+d2) + (d2−d1)²/(4C), where C is the center distance between pulleys. — so results are accurate every time, not an approximation.