Unit Price Grundpreis for WooCommerce — price per 1 kg, 1 l, 1 m² next to the price

Unit Price Grundpreis for WooCommerce shows the price per unit next to the product price — per 1 kg, 1 l, 1 m, 1 m² or 1 m³, as the German Price Indication Ordinance (Preisangabenverordnung, PAngV) sets it. You only enter the package contents (Füllmenge) — the plugin works out the unit price from the current price, sale price included, and shows it on the product page, in listings, for the selected variation, in the cart and at checkout.

What comes from the law and what is the shop’s decision. The rules follow the current text of PAngV (§ 2, § 4, § 5): the unit price includes VAT; the default is 1 kg / 1 l, 100 g / 100 ml only for loose goods; products under 10 g / 10 ml get none. Whether a product needs a unit price and which reference quantity to use is decided by the shop — this is not legal advice. Rules of other EU countries are not implemented separately.

What the customer sees

• Under the product price — “Unit price: 27.80 € / 1 kg” (“Grundpreis: …” in the German locale), from the same price the customer sees, sales included.
• Variable products: a range or “from” in the list and the exact unit price of the selected variation — even when all variations cost the same but the pack sizes differ.
• Cart and checkout: classic and block cart, block checkout, classic checkout and the Mini-Cart in the header of a block theme.
• Nothing extra: products under 10 g / 10 ml, those switched off by hand and those where the unit price equals the price (if set) show without it.

What the admin gets

• Fields in products and variations: net content, unit (g, kg, ml, l, m, m², m³…), drained weight, reference quantity, own quantity for bulk goods, application name. A variation without its own value uses the product’s.
• “Shown now” preview in the editor — exactly what the customer will see.
• Display settings: where to show it, a text template with {price} / {quantity} / {content}, the range for variations, the 10 g / 10 ml limit, “hide when equal to the price”.
• Shortcode [ccupg_unit_price] for page builders and themes with their own price output.

Pro: orders, Google and bulk filling

• Unit price in order lines at the time of purchase — in the admin and in WooCommerce e-mails to the customer and admin.
• JSON-LD referenceQuantity in the product markup — Google gets the unit price for unit pricing.
• Net content detection from the name or an attribute (“500 g”, “0,75 l”, “6 x 0,33 l”): preview, bulk filling of empty values in the background and on product save. Only empty fields are filled.
• Catalogue check: products without net content in chosen categories + CSV, and unit price columns in the WooCommerce CSV import/export.

Works together with our other modules for Germany and the EU

• E-Invoice EN 16931 for WooCommerce — ZUGFeRD / XRechnung invoices; orders with unit prices give invoices with the same lines and totals that pass the validators.
• EU VAT Check for WooCommerce — VIES validation of VAT numbers and reverse charge for EU B2B customers.
• DATEV Export for WooCommerce — postings for your tax adviser from orders and refunds.

How it works — step by step

1. Open a product → Product data → Unit price (Grundpreis): enter the net content, e.g. 500 g.
2. If needed — drained weight, another reference quantity or an application name.
3. Save — the preview shows “25.80 € / 1 kg”.
4. Customers see the unit price on the product, in the list, cart and checkout; change the price or a sale and it is recalculated by itself.
5. With Pro — fill in the net content for the whole catalogue from product names and check where it is missing.

Under the hood

• Calculated from WooCommerce’s displayed price (wc_get_price_to_display) and the cart price — VAT and sales are handled exactly as in the price next to it.
• Block cart and checkout — through the Store API and the item price filter; the Mini-Cart — when its block renders in the header.
• JSON-LD (Pro): UnitPriceSpecification.referenceQuantity with unit codes per Google Merchant documentation; the markup has not been run through Google’s Rich Results Test yet.
• Detection (Pro) reads “500 g”, “0,75 l”, “6 x 0,33 l”, “4×125g”, m², cm — and can be wrong (“5G” in a smartphone name), which is why there is a preview and only empty fields are filled.
• Deleting the plugin removes product metadata, options and cron jobs; the unit price in lines of past orders stays as history.

Installation

1. Plugins → Add New → Upload Plugin: choose catcode-unit-price-grundpreis-for-woocommerce-1.0.0.zip and activate.
2. WooCommerce → Unit price: check where to show the unit price and the text template.
3. Enter the net content and unit in your products (in variations — if needed).
4. For Pro: paste the licence key from the e-mail after payment or start the 7-day trial, then run the detection and the catalogue check.