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Scales tell Garde how much of a product is used every time a POS button is pressed. A scale of 1 means “the whole unit.” A scale of 0.236588 means “about a quarter of the unit.” A scale of 6 means “six of the unit.” Let’s look at a few real scenarios.

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Example 1: Same Wine, Two Pour Sizes

The situation: A restaurant sells Echo Bay Sauvignon Blanc two ways — by the bottle and by the glass. What to do: Map the same product (the bottle) to both POS buttons. Then set different scales:
POS ButtonProduct MappedScaleWhy
Bottle of Echo Bay Sauvignon BlancEcho Bay Sauvignon Blanc1Selling a whole bottle = 1 bottle used
Glass of Echo Bay Sauvignon BlancEcho Bay Sauvignon Blanc0.236588A 6oz glass from a 25.36oz (750ml) bottle
Before: Both buttons default to a scale of 1, which would count every glass pour as a full bottle sold. Your theoretical usage would be wildly inflated. After: The bottle button reports 1 bottle per sale. The glass button reports 0.236588 bottles per sale. Your theoretical usage now matches reality. Don’t want to do the math yourself? Check the PMIX Mapping Scales reference for pre-calculated values.

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Example 2: Scale Greater Than 1 (Six-Packs)

The situation: A restaurant sells six-packs of Blue Moon. The product in Garde is “Blue Moon Belgian White 12oz Bottle” with a unit of 1 bottle. What to do: Map the product to the six-pack button and set the scale to 6.
POS ButtonProduct MappedScaleWhy
Blue Moon 6-PackBlue Moon Belgian White 12oz Bottle6Each six-pack sale uses 6 bottles
Before: With the default scale of 1, Garde would only count 1 bottle sold per six-pack. You’d show a huge negative variance — it would look like beer was disappearing. After: Every time the six-pack button is pressed, 6 bottles of Blue Moon are reported as sold. Your numbers line up.

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Example 3: Recipes with Different Sizes (Fries)

The same scale logic works for recipes, not just products. The situation: A restaurant sells large and small fries. Both use the same fries recipe. What to do: Map the same recipe to both buttons. Set the large fries scale to double the small fries scale (because a large order uses roughly twice the product).
POS ButtonRecipe MappedScaleWhy
Small FriesFries Recipe1Baseline portion
Large FriesFries Recipe2Double the baseline portion
This approach works anytime you have the same product or recipe in multiple sizes — soups, sides, drinks, you name it.