--- title: Unit of Measure (UOM) conversion and setup description: Learn how to set up Unit of Measure (UOM) conversions in Paragon to manage purchasing in bulk and selling in units. --- [Skip to content](https://support.paragon-erp.com/unit-of-measure-uom-conversion-and-setup#main-content) - [English](https://support.paragon-erp.com/unit-of-measure-uom-conversion-and-setup) - [Nederlands](https://support.paragon-erp.com/nl/maateenheid-conversie-aanmaken) English Show submenu for translations [![paragon logo-1.png\]](https://support.paragon-erp.com/hs-fs/hubfs/paragon%20logo-1.png?width=240&height=75&name=paragon%20logo-1.png)](https://support.paragon-erp.com/?hsLang=en) - [New Ticket](https://share-eu1.hsforms.com/1PiwaZCxTRpabuHVnQxGeXQc751y) - [Tickets](https://help.paragon-erp.com/tickets) - [Knowledge Base](https://support.paragon-erp.com/) - [Sign out](https://20488534.hs-sites.com/_hcms/mem/logout) Open main navigation Close main navigation - [New Ticket](https://share-eu1.hsforms.com/1PiwaZCxTRpabuHVnQxGeXQc751y) - [Tickets](https://help.paragon-erp.com/tickets) - [Knowledge Base](https://support.paragon-erp.com/) - [Sign out](https://20488534.hs-sites.com/_hcms/mem/logout) - - [English](https://support.paragon-erp.com/unit-of-measure-uom-conversion-and-setup) - [Nederlands](https://support.paragon-erp.com/nl/maateenheid-conversie-aanmaken) English Show submenu for translations - [Go to website](https://www.paragon-erp.com/) [Go to website](https://www.paragon-erp.com/?hsLang=en) Welcome! 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[Advanced Settings](https://support.paragon-erp.com/configuring-paragon?hsLang=en#advanced-settings) April 30, 2026 # Unit of Measure (UOM) conversion and setup ## Learn how to set up Unit of Measure (UOM) conversions in Paragon to manage purchasing in bulk and selling in units. ### Table of contents - [Creating UOM conversions](https://support.paragon-erp.com/unit-of-measure-uom-conversion-and-setup#creating) - [Configuring the product](https://support.paragon-erp.com/unit-of-measure-uom-conversion-and-setup#configuring) - [Vendor-specific UOM references](https://support.paragon-erp.com/unit-of-measure-uom-conversion-and-setup#vendor) - [Usage in purchase orders](https://support.paragon-erp.com/unit-of-measure-uom-conversion-and-setup#usage) In ParagonERP, you can manage products that are purchased in one unit (e.g., a box) but sold in another (e.g., pieces). By setting up a conversion table, the system automatically calculates the correct inventory levels and pricing based on the conversion rate. ### Creating UOM conversions To enable automatic calculations between different units, you must first define the conversion rules. 1. Navigate to **settings** \> **system** \> **UOM conversion**. 2. Click **edit** and then the **plus icon (+)** to add a new conversion. 3. Fill in the following fields: - **From UOM:** The unit you want to convert from (e.g., "inch"). - **To UOM:** The unit you want to convert to (e.g., "cm"). - **Conversion Rate:** The multiplier used for the conversion (e.g., "2.54"). ### Configuring the product Once your conversions are defined, you must assign a base unit to your item. 1. Open the **product** module and select your item. 2. Locate the **Unit of Measure** field. 3. Select the unit in which you typically sell the product (e.g., "Pieces"). ### Vendor-specific UOM references You can specify different purchase units for each supplier. This allows you to buy in "boxes" from one vendor and "pallets" from another. 1. Go to the **references** (Relatie) tab within the product record. 2. Click **edit** and then **create**. 3. Select **Vendor** as the Reference Type and choose the specific **Reference ID** (the supplier). 4. Select the **Unit of Measure** field and choose the buying unit (e.g., "Box of 12"). 5. Click **finish** and then **save**. ### Usage in purchase orders To see these conversions in action during the purchasing process, ensure the **Unit of Measure** field is visible in your purchase order screen. 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