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Forklift Attachment Capacity Calculator

Forklift Attachment Load Capacity Calculator

Choose a rated-capacity reference, then enter the truck capacity and attachment dimensions for your configuration.

Q is the truck capacity at the selected mast height and reference load center C. The formula then applies the attachment and actual load-center inputs; do not enter a Q value that has already been derated for L.

Forklift Data

Choose a rated-capacity row to prefill the reference dimensions, then replace Q, X, C and S with the applicable figures from the truck load chart or technical manual.

This is a tonnage reference, not a model-performance claim.
Record only. Q must reflect this lift height when the truck load chart specifies a capacity reduction.
Use Q for the selected mast height at load center C. Do not use a value already derated for the actual load center L.
Do not add a generic 10% or 20% overload allowance. A manufacturer's structural design margin is not automatically usable lifting capacity. Enter only the capacity confirmed for the actual truck and configuration.

Attachment and Load Center Inputs

Enter the attachment mass and the horizontal distances that change the load moment.

Enter the attachment effective thickness (ET) in millimetres.

Preliminary Capacity Result

Combined load capacity G
648
kg
Calculation Details
F07 — G = [Q × (X + C) − M × (A + CGH)] ÷ (A + ET + L)

What Still Requires Technical Confirmation

The preliminary result does not replace the capacity information for the actual truck, mast and attachment configuration.

Lift height and mast

Confirm the truck's available capacity at the required lift height and with the selected mast.

Truck load center data

Check the truck load chart when the actual load center differs from the rated load center.

Attachment specification

Confirm attachment rated capacity, effective thickness, horizontal CG, opening range and mounting class.

Final load check

Compare the required load with the verified truck-plus-attachment capacity before operation.

For the engineering inputs behind this estimate, read how attachment dimensions affect forklift capacity.

Ask For A quick Quote

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