---
title: "FBA Pallet Calculator | Units Per Carton, Pallet & Container - Flapen"
canonical_url: "https://flapen.com/tools/fba-packing-calculator"
last_updated: "2026-07-18T11:20:34.390Z"
meta:
  description: "Free pallet calculator for Amazon FBA — estimate your master carton, then see how efficiently it fills an air, truck, or sea pallet in 3D, with a supplier spec sheet."
  "og:description": "Free pallet calculator for Amazon FBA — estimate your master carton, then see how efficiently it fills an air, truck, or sea pallet in 3D, with a supplier spec sheet."
  "og:title": "FBA Pallet Calculator | Units Per Carton, Pallet & Container - Flapen"
---

# **FBA Pallet Calculator**

Units per carton, pallet, and shipping container

**Start from an example**

**1 ****Unit & carton**

**Unit dimensions (in)**

lengthwidthheight**Units per carton****Estimated carton****20 × 16 × 12 in **· 2 × 2 × 2 units**2 ****Ship as**## **From one unit to a fully packed pallet**- **Estimate your master carton** Enter your unit size and how many units go in a box; the calculator estimates the tightest master carton — the most compact whole-unit arrangement — capped at Amazon's 150 units per carton. - **Cartons per pallet** Cartons stack upright on the pallet in even layers within each mode's fixed height. The tool shows cartons per layer, number of layers, and total units per pallet. - **Air, truck or sea** Pick a shipping mode with a fixed footprint and height — an air ULD, a road/FBA pallet, or an ocean-container pallet — and see how many pallets and units fit the matching vehicle. - **Efficiency, not just a count** The pallet is a fixed shipping volume. The calculator splits utilization into floor coverage and stack height, so you can see exactly where you are paying to ship empty air. - **Inches or centimetres** Switch between inches and centimetres at any time; your measurements convert automatically so the physical product stays the same size. - **Supplier spec sheet** Copy or print a clean spec sheet — units per carton, cartons per pallet, pallet height, units per vehicle — to send straight to your factory or freight forwarder. ## **Carton, pallet & packing efficiency**