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Bucket Elevator Capacity & Power Calculator

Capacity and motor rating from bucket size, pitch, speed, fill factor and lift.

Metric · IS practiceFormula shown with your numbersNothing stored

How this calculator works

Capacity is bucket volume times the number of buckets passing a point per second, times the fill factor and the bulk density. Buckets per second follows directly from belt or chain speed divided by bucket pitch. Power is dominated by the lift term — the work of raising the material through the vertical height — plus an allowance for scooping resistance at the boot and drive losses.

Formulas used

Buckets per secondn_b = v ÷ p
Volume flowQ_v = V_bucket × n_b × fill × 3600 ÷ 10⁶ (m³/h)
Mass flowQ_m = Q_v × ρ ÷ 1000 (TPH)
Lift powerP = Q_m × H × 9.81 ÷ 3.6 (W)

Checked against

47 TPH at a 15 m lift returns a 5.5 kW motor selection, which matches standard elevator sizing practice.

Worth knowing

Fill factor is typically 0.6–0.75 for free-flowing material and lower for sluggish or fibrous material. Boot scooping resistance is included as an allowance, not calculated exactly.

Bucket Elevator Capacity & Power Calculator — common questions

How do I calculate bucket elevator capacity?
Multiply the water capacity of one bucket by the fill factor, by belt speed divided by bucket pitch, and by 3600 to get m³/h. Multiply by bulk density for tonnes per hour.
What speed should a bucket elevator run at?
Centrifugal discharge elevators typically run 1.2–2.0 m/s so the material is thrown clear at the head. Continuous discharge elevators run much slower, around 0.5–1.0 m/s, so material rolls off the back of the bucket in front.

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Got a number you don’t like?

If the sizing is telling you something awkward, send it over. We build these machines — we can tell you whether the number is wrong or the layout is.

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Chennai, Tamil Nadu

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

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