# Second Unit of Measure (UOM)

 If you are ordering and purchasing your items in larger quantities, or your suppliers have a different unit of measurement (UOM)  from the one you use in your system, ERPAG enables you to set a second unit of measure, that will convert the purchased products UOM to the one you are using to store your stocks.

***You can, of course, use the second UOM in production and sales as well!*** 

In order to set up the second UOM go to:

```
Inventory > products and services > 
open the wanted product from the list or create a new one
```

The set up is placed in the barcode/second UOM section.

![](/files/-LUA1uUeBggZUwoDfLG8)

The inserted the setting together with barcodes allows two options to be set at once. I.e. when scanning the barcodes, the amount will be calculated, while when purchasing the column "quantity" means the ratio to "default UOM" (in our example "1 pl = 80 pcs"). 

ERPAG automatically assigns a barcode (EAN13 custom range), which can be retyped in as appropriate number for you, or if you do not need it, leave the field blank.

{% hint style="info" %}
 When the new Purchase Order is created, the data for the second UOM entry will not be visible, they will only appear if we select one of the items that have its second UOM defined in its settings
{% endhint %}

![](/files/-LUA2l8FHUSiYDP113Yj)

 The newly opened columns are divided into units containing the "second UOM" data from/for the supplier and the "default" UOM where the data that comes in our stock is recalculated. 

Any data that changes (fixed parity) will be automatically recalculated. In our example, if you enter the second UOM quantity as 12 and the price "$900" in "default" the data will be 120 pcs at a price of $90.00.

 When adding an item to the Purchase Order, the second unit of measure will be suggested. If we have more than two, then we will have the possibility to change it.

![](/files/-LUA3FovJUPE7ec-TiWh)

To read a more detailed instruction, that explains more specific cases, such as using the mobile app, the fulfillment and variable products that have a second UOM set up, please use the following link:

<https://blog.erpag.com/2018/09/erpag-5.html>


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