Guide · Updated 22 October 2026

Pack-weight giveaway: how to measure it, cost it and cut it

Giveaway is the product you put in every pack above the weight on the label. It never shows up as scrap, so it's easy to miss, but on a busy filling line it can be one of the biggest losses you have. This guide is for New Zealand and Australian manufacturing plants packing to a declared weight on a generic packing line, across any product sold by weight.

What counts as giveaway

If the label says 500 g and the average pack weighs 507 g, you're giving away 7 g a pack. Giveaway is the gap between your actual average fill and the declared quantity. Some overfill is deliberate, because you need a safety margin to stay legal. The question is whether your margin is the size it needs to be, or bigger because nobody has measured it lately.

The legal floor in NZ and Australia

Both countries use an average quantity system for pre-packed goods. In plain terms:

• the average quantity in a batch must be at least the declared quantity;
• only a small share of packs may fall short by more than a set tolerance (the "tolerable negative error", which depends on the pack size); and
• no pack may be short by more than twice that tolerance.

The detail sits in the Weights and Measures Regulations in New Zealand and the National Trade Measurement Regulations in Australia. Check the current rules and tolerance tables with Trading Standards (MBIE) in NZ or the National Measurement Institute in Australia before you change any target. Cutting giveaway never means going under these limits.

How to put a dollar figure on it

You need four numbers: the declared weight, your actual average fill, packs per day, and the cost of the product going into the pack (material cost per kg, not the selling price).

Example data (not from a real plant): a 500 g bag line running 20,000 packs a day with an average fill of 508 g, and product costing NZD 12 per kg.

• Overfill per pack: 508 g − 500 g = 8 g
• Overfill per day: 8 g × 20,000 = 160 kg
• Cost per day: 160 kg × NZD 12 = NZD 1,920
• Over 250 production days: about NZD 480,000 a year

Even if only part of that 8 g is excess margin, a few grams back can be worth a lot. Run your own numbers: the Line Loss Finder (NZD 49) puts a dollar estimate on giveaway alongside your other line losses and ranks your top three fixes.

Why the margin creeps up

The overfill you need is set by how much your pack weights spread, not by the average alone. A filler that varies a lot forces you to aim high so the light packs stay legal. Common causes of spread:

• product that changes in density, piece size or moisture through the shift;
• worn or dirty filler parts, such as augers, cups, valves and multihead buckets;
• targets set once at commissioning and nudged up "to be safe" after a short-weight scare, then never brought back down;
• checkweigher data that's collected but not reviewed, so drift goes unseen;
• different settings by shift or operator.

A simple way to reduce it

1. Measure first. Pull a week of checkweigher data per SKU. Work out the average and the standard deviation (how much fills spread).
2. Fix spread before target. Clean and maintain the filler, steady the product feed and standardise settings. Lowering the target without reducing spread just makes more packs short.
3. Set the target from the data. With less spread, recalculate the lowest target that still keeps you inside the average quantity rules, with a margin your QA team is comfortable with.
4. Lock it in. Write the target and the checks into the standard work for each shift, and review giveaway weekly as a number on the board, in grams per pack and dollars per week.

Where giveaway fits with OEE

Giveaway is a yield loss, so a line can show strong OEE and still be leaking product. Check both: use the free OEE calculator to split availability, performance and quality, then look at giveaway separately.

This guide is general information, not legal advice. Check trade-measurement obligations with the regulator for your country.