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How to create a WooCommerce PDF invoice with new units of measure (with free plugins)?

Updated: 2022-09-06 / Blog

How to create a WooCommerce PDF invoice with new units of measure (with free plugins)?

Tomasz Bednarek

You can enable the WooCommerce product stock and quantity for better management of your stock and WooCommerce orders. But the simple quantity unit may not be enough when you sell products on weight, dimension, area, or volume. Today, you will learn two things: how to add new units of measure for WooCommerce products and how to create a PDF invoice in WooCommerce with new units. The complete solution with 2 free plugins!

WooCommerce PDF invoice & new units of measure

By default, WooCommerce gives you the basic info about the quantity and a plain email after the purchase.

WooCommerce Order Details Email To The Customer

Let’s see a better way. Here is an example of a PDF invoice with WooCommerce products with new units of measure. It looks much better, don’t you think? Both for your customers and your accounting!

Invoice With New Units Of Measure In WooCommerce

Table of contents

  • Create PDF invoices with a new unit of measure – A Step-by-step guide
    • Install the 2 free plugins
    • Enter your company details
    • Create PDF invoices for WooCommerce orders
    • Change the product unit of measure
    • Enable the Calculate Inventory option
    • Products with a new unit of measure
    • The PDF invoice with new units
    • Send or print the invoice
  • More automation for invoicing (also with VAT EU validation)
  • Unit dimensions, pricing table, and more of Measurement Price Calculator

Steps to create a WooCommerce PDF invoice with new units

So, let’s follow a few steps to start invoicing with new units of measure in WooCommerce!

Step 1 – Install the 2 free plugins

First, go to the WordPress repository to find the plugins.

Download Flexible Invoices →

Download Flexible Quantity →

Then, install and activate the plugins in the WordPress->Plugins tab.

You can find them using the search bar too:

Add A New Plugin In Woocommerce

Step 2 – Enter your company details

The PDF invoice will get the data about products and a client from a WooCommerce order. In the plugin settings, fill in your business details that will appear on PDF invoices.

Proforma Invoice in WooCommerce - Invoice Settings

Step 3 – Create PDF invoices for WooCommerce orders

The plugin can issue PDF invoices for and outside WooCommerce orders.

WooCommerce VAT Invoice To Uk After Brexit

Of course, if you need to sell products based on weight, dimension, area, or volume, the default item for counting the quantity may not be enough. Let’s change that!

Step 4 – Change the product unit of measure

With the Flexible Quantity plugin (both free and PRO), you may define the new unit for the product in the edit screen -> Product Data section. You can choose from weight, dimension, area, and volume units.

Set The New Unit Of Measure For A Woocommerce Product

Step 5 – Enable the Calculate Inventory option

That will let you show the selected units of measure on the PDF invoices. The plugin will also calculate the inventory based on the new unit of measure.

Calculate Inventory Per New Unit Of Measure

Step 6 – Products with a new unit of measure

You will now be able to sell products based on weight, dimension, area, or volume. Let’s see the product page. The price will dynamically change depending on the quantity of the new unit.

Change The Price Based On The New Unit Of Measure

Step 7 – PDF Invoice with new units

The invoice will show all information about the WooCommerce order including now new units of measure on the document dynamically:

Invoice With New Units Of Measure In Woocommerce

Step 8 – Send or print the invoice

Of course, you can send such a WooCommerce PDF invoice to a customer and use it for accounting purposes.

Woocommerce Send Email Receipt

Or download in bulk to speed up all invoices from a certain date range.

Flexible Invoices Woocommerce WordPress Download Invoices
Download invoices in bulk for a chosen date range. Then send them or print invoices.

So, download the free plugins and follow the steps above! Create and send professional WooCommerce PDF invoices, Also, when you sell products with new units of measure!

Auto-generate PDF invoices in WooCommerce

The Flexible PDF Invoices for WooCommerce plugin lets you automate invoicing in your store with the PRO version of the plugin. There are a lot of useful features in the PRO and the plugin add-ons that can help you customize PDF invoices and speed up your paperwork!

PRO features

  • Issue and send WooCommerce PDF invoices automatically,
  • Three types of documents – invoice, proforma, and correction invoice,
  • VAT invoices compatible with EU law,
  • OSS support and EU VAT number validation in the VIES database,
  • Customizable invoice emails and documents,
  • Advanced options like accounting reports, invoice filtering, sending options, and templates settings with additional add-ons,
  • Priority email support,
  • Professional technical assistance and updates for the plugin active subscription.

More features of the Measurement Price Calculator

When selling based on new units of measurement you may want to adjust the price or let customers decide about the exact size or volume. Let’s see the functionalities of the Flexible Quantity Measurement Price Calculator for WooCommerce plugin.

Additional Pro Options In The Flexible Quantity Plugin

As you can see, with the subscription to the PRO version of the plugin you can do more.

PRO features

  • Unit dimensions, also with smaller units of measure e.g. kg -> g,
  • Fixed or user-based value of the unit’s dimensions,
  • Minimum and maximum values for the unit dimensions,
  • Product price based on the dimension and dynamic unit measurement calculations,
  • Pricing table for ranges to have dynamic prices depending on the quantity,
  • Set shipping classes based on the product quantity,
  • Priority email support & updates.

Summary: WooCommerce PDF invoice & new units of measure

Today, you’ve read how to create PDF invoices and sell based on new units in WooCommerce. I hope the 2 plugins I’ve shown you will save a lot of your time and improve your store!

You can use any combination of the plugin types. It means that you can use Flexible Invoices free (or PRO) with Flexible Quantity free (or PRO) depending on your needs.

You can test the two free plugins by downloading them from the WordPress repository.

Download Flexible Invoices → Download Flexible Quantity →

Also, check the PRO versions of the plugins in a free demo!

If you have any questions, contact us!

Extra: Where to find more information about the plugins

Read more about Flexible Invoices on our blog.

For more information about the Flexible Quantity Measurement Price Calculator plugin, visit and read:

  • Flexible Quantity product page,
  • Plugin documentation,
  • How to use Measurement Price Calculator for WooCommerce (free plugin),
  • About a WooCommerce Price Calculator plugin (the article with more examples),
  • Article on how to add product dimensions in WooCommerce,
  • How to change the weight unit in WooCommerce (no Code required),
  • About adding new units of measure (in detail).

About Tomasz Bednarek

Finds solutions with enthusiasm. Helps customers develop their stores and implement good ideas.

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