How to Calculate Conveyor Capacity (t/h): Formula, Example & Free Tool
Conveyor capacity is the mass flow a belt transports per hour — the single most important number when sizing a bulk-handling line. Get it wrong and you either starve downstream equipment or overload the drive.
In this guide you'll learn the exact capacity formula, see how belt speed and bulk density change throughput, and run your own numbers in seconds with our free calculator.
The formula
Q (t/h) = 3.6 × A × v × ρ, where A is the loaded cross-sectional area (m²), v is belt speed (m/s), and ρ is bulk density (t/m³). The 3.6 factor converts m³/s to m³/h and kg to tonnes.
Worked example
For a belt loaded to 0.05 m² running at 1.5 m/s with limestone (1.6 t/m³): Q = 3.6 × 0.05 × 1.5 × 1.6 = 0.43 t/h per unit profile. Scale the cross-section to your real trough geometry for the full line rating.
Common mistakes
Ignoring trough angle, underestimating bulk density at higher moisture, and forgetting to derate for inclines above 10°. Always cross-check with a manufacturer capacity table for final design.
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Frequently asked questions
Where does the 3.6 come from?
It converts cubic metres per second into cubic metres per hour (×3600) divided by 1000 to express mass in tonnes.
Does incline reduce capacity?
Yes. Above roughly 10° you should derate capacity to prevent material rollback.
This guide is for educational purposes. Always verify against the relevant standard before final design.