Kyle Phillips

Why Units?
Units provides your users with an intuitive way to choose and display their preferred unit of measurement. The user’s preferred unit of measurement is saved via session, cookie, or none – configurable under the plugin settings.
Any number of primary/alternate units can be added, along with their conversion formulas.
Visit <a href="http://unitswitcher.com" rel="nofollow ugc">unitswitcher.com</a> for more detailed information.
Using Units
Add primary units under Settings > Units. Alternate units may be added by providing their name and conversion formula. Multiple alternate units may be added for each primary unit.
Use the function <code>unit_switcher($value, $primaryunit, $round)</code> in your template to display the switcher. Pass the stored value as the first parameter and primary unit of measurement as the second value.
To display a single switcher, the shortcode [unit_switcher] is available for use. The shortcode requires two parameters: <code>unit</code> (the primary unit being converted) and <code>value</code> (the stored value).
For more information visit <a href="http://unitswitcher.com" rel="nofollow ugc">unitswitcher.com</a>.
Important: Unit Switcher requires WordPress version 3.8 or higher, and PHP version 5.3.2 or higher.
<h3>More Information</h3>
<h4>Using the Template Function</h4>
unit_switcher($variable, $primaryunit, $round);
Parameters: 
* $variable – The stored value (integer or float) 
* $primaryunit – The primary unit (the stored value should be stored in this unit) 
* $round – Number of digits to round to (default is 2)
Visit <a href="http://unitswitcher.com" rel="nofollow ugc">unitswitcher.com</a> for more detailed information.

Units

Add front-end dropdowns for toggling measurement units.

Ibrahim

It is a simple woocommerce addon or extension.If Enable the plugin, then you will get extra or additional all necessary measurements units for products 
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<h3>Features</h3>
<ul>
<li>After enabling this plugin, you will get extra or additional all necessary measurements units for products.</li>
</ul>

additional measurements units for WooCommerce

It is a simple woocommerce addon or extension.If Enable the plugin, then you will get extra or additional all necessary measurements units for product …

Units vs additional measurements units for WooCommerce