Nested tray stack height: measure the increment, not just tray depth

The purchasing question

Nested trays overlap, so a stack is shorter than tray count multiplied by single-tray depth. The extra height added by each subsequent tray is the nesting pitch. Confusing these two dimensions can produce a large error in carton-height planning.

Calculation method

Stack height = first tray height + (item count − 1) × additional nesting pitch. Measure the pitch under the packing condition intended for shipment. Add required protective packaging and clearance outside the tray-stack calculation.

Worked example

With a first-tray height of 50 mm and nesting pitch of 8 mm, a stack of 100 trays is 50 + 99 × 8 = 842 mm. Multiplying 100 by 50 mm would predict 5,000 mm. A height allowance of 850 mm fits at most floor((850 − 50)/8) + 1 = 101 trays before additional clearance.

The estimate assumes a consistent nesting increment. Real trays may vary or compress under load. Confirm practical carton fit with a representative packed stack; do not treat the calculation as a stacking-load or damage-resistance rating.

Checks before using the result

• Use additional nesting pitch, not full tray height.
• Include the first tray separately.
• Reserve carton clearance and wrapping thickness explicitly.

Common questions