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Belt Conveyor Capacity & Power Calculator

Throughput and an indicative motor rating, from width, speed, trough angle, length and lift.

Metric · IS practiceFormula shown with your numbersNothing stored

How this calculator works

Capacity is built from the cross-sectional area of material the belt can carry. The three-roll troughed section from DIN 22101 gives the theoretical area from belt width, trough angle and surcharge angle. That theoretical figure is then derated twice — by a fill factor for real loading conditions, and by an incline reduction factor interpolated from the angle implied by lift ÷ length. Power comes from the friction resistance along the carry and return runs plus the work done lifting the material, and the result is rounded up to the next standard motor frame.

Formulas used

Volume flowQ_v = A × v × 3600 (m³/h)
Mass flowQ_m = Q_v × ρ ÷ 1000 (TPH)
Derated capacityQ = Q_theoretical × fill factor × incline factor
Lift powerP_lift = Q × H × 9.81 ÷ 3600
Friction powerP_f = f × L × (2·m_belt + m_load) × v × 9.81 ÷ 1000

Checked against

An 800 mm belt at 35° trough and 20° surcharge gives a theoretical section of 0.0836 m², which matches the DIN 22101 tabulated value.

Worth knowing

Capacity is derated by a fill factor of 0.85 by default. Above 18° incline the calculator warns that a plain belt will not hold the load and a cleated or chevron belt is needed.

Belt Conveyor Capacity & Power Calculator — common questions

How do I calculate belt conveyor capacity in TPH?
Work out the cross-sectional area of material on the belt from the width, trough angle and surcharge angle, multiply by belt speed to get m³/s, then by bulk density and 3600 to get tonnes per hour. Derate for real fill and for incline.
What motor power does a belt conveyor need?
Two components add up: the friction of moving the belt and load along the length, and the work of lifting the load through the vertical rise. Lift usually dominates on an inclined conveyor and friction dominates on a long flat one.

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T-231 A, Sidco Women's Industrial Park
Kattur, Avadi, Chennai – 600 062
Tamil Nadu, India

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