# How to Use the FOC Pack Calculator

> Free-of-Cost deals should be simple — but calculating exact whole-pack quantities without decimal packs is surprisingly tricky. Here is how the FOC Pack Calculator solves it.

- URL: https://www.pyalm.com/blog/foc-pack-calculator-guide
- Author: Fadhil Abdulla
- Category: Free Tools
- Published: 2026-06-07
- Updated: 2026-06-07

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## What is an FOC Deal?

FOC stands for Free of Charge. In trade distribution, suppliers often offer a deal like "buy 10 cases, get 1 free" — expressed as a percentage of the main order quantity. The complication is that products are sold in whole packs. You cannot order 0.7 of a case.

## The Rounding Problem

If you target a 10% FOC rate on 73 units and your pack size is 12, the naive calculation gives 7.3 units free. That is not a real quantity. You need to find the nearest main order and FOC combination that both uses whole packs and lands at or near the target percentage.

## What the Calculator Does

The [FOC Pack Calculator](https://www.pyalm.com/free-tools/foc-calculator) takes three inputs:

- **Main order quantity** (units)
- **Pack size** (units per pack)
- **Target FOC percentage**

It then calculates the exact whole-pack Main Order and FOC Pack quantities that hit your target rate as closely as possible — along with a breakdown of paid units, free units, and any excess.

## Who It Is For

Useful for sales reps negotiating deals, procurement teams checking supplier offers, and anyone who has spent ten minutes in a spreadsheet trying to reconcile a FOC calculation.