The product information page in Zen Cart can be set to display the product weight.  By default the unit of measure is ‘labelled’ as lbs.  The reason I say ‘labelled’ as the unit of measure is only a label used and is set in a couple of language defines.

The shopping cart page can also be set to display the product and/or order weight.

To change the unit of measure for weight in Zen Cart:

1. Open the english.php file located in the /includes/languages/ directory.
2. Find this section of code:

   define('TEXT_PRODUCT_WEIGHT_UNIT','<strong>lbs</strong>');

3. and modify the define statement to required unit (for example, grams or kgs):

   define('TEXT_PRODUCT_WEIGHT_UNIT','<strong>kg</strong>');

4. Also, find this section of code:

   define('TEXT_SHIPPING_WEIGHT','<strong>lbs</strong>');

5. and modify to match the units used above for Product Weight Unit:

   define('TEXT_SHIPPING_WEIGHT','<strong>kg</strong>');

    

   ** Be sure to keep the single quote marks in your new define statements.
   

6. Save the modified english.php file to your override folder.  This will be /includes/languages/CUSTOM/ where CUSTOM represents the name of your current template folder.

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