by Kavio Labs · for WooCommerce 10.1+ on WordPress 6.7+
Sell products by weight, length, area or volume with decimal quantities, unit prices, step/min/max and a live price on the product page (HPOS + Cart/Checkout blocks).
Sell products by weight, length, area or volume with decimal quantities, unit prices, step/min/max and a live price on the product page (HPOS + Cart/Checkout blocks).
WooCommerce 10.1 - 11.2, WordPress 6.7+
Sell products by weight, length, area or volume. Customers buy exactly what they need: 1.25 kg of cheese, 2.6 m of fabric, 3.33 m² of flooring. The product price is the price of one unit; the total is price × quantity.
Requirements: WordPress 6.7+, WooCommerce 10.1+ (tested with 11.2), PHP 7.4-8.3. Works with block themes and classic themes, the Cart and Checkout blocks and the classic shortcodes, and High-Performance Order Storage (HPOS).
kv-sell-by-measure-<edition>.zip, click Install Now and Activate. WooCommerce must be active.Updating: upload the new zip (WordPress offers "Replace current with uploaded"). Settings, products and orders are kept.
Uninstalling: deactivate and delete the plugin. Product and category settings are deleted only when Remove data on uninstall is on. Orders are never changed. Without the plugin WooCommerce treats quantities as whole numbers again, so finish or cancel open orders with decimal quantities first.
Products > Edit product > Product data > Sell by measure (simple and variable products; variations use the settings of their parent product).
| Field | Example | What it does |
|---|---|---|
| Sale unit | Kilogram (kg) | Use the category default (default), Whole items (standard) or one of 15 units: kg, g, lb, oz, m, cm, ft, yd, in, m², ft², L, ml, gal, fl oz. With a unit, the regular price is the price of 1 unit. |
| Quantity step | 0.05 | Smallest change of the quantity, up to 4 decimals. Quantities are snapped to the step (2.33 m becomes 2.3 m with a 0.1 step). Its decimals are the decimals shown. Empty = 0.01. |
| Minimum quantity | 0.1 | Smallest quantity per cart line. Empty = one step. |
| Maximum quantity | 5 | Largest quantity per cart line. Stock still applies. Empty = no limit. |
| Default quantity | 0.5 | Quantity in the field when the page opens and the amount added from product lists. Empty = the minimum. |
| Quick amounts | 0.25, 0.5, 1, 2 | Up to 8 buttons under the quantity field ("250 g", "500 g", "1 kg", "2 kg"). With decimal commas use semicolons: 0,25; 0,5; 1. |
| Length x width | on | Area units (m², ft²) only: customers enter length and width; the quantity is the area rounded up to the step. |
Stock: keep stock in the sale unit (Inventory tab); decimals are allowed (125.5). Orders reduce it exactly and cancelled orders restore it.
Shipping weight: enter the weight of one unit (1 kg for a product sold per kg). WooCommerce multiplies it by the quantity.
Products > Categories > Edit, section Sell by measure defaults, has the same fields. Products whose sale unit is Use the category default use the settings of their first category (or parent category) that has a unit.
WooCommerce > Settings > Sell by measure
| Setting | Default | What it does |
|---|---|---|
| Unit after prices | on | "/ kg" after the price on product pages and product lists |
| Quick amounts | on | Quick amount buttons on product pages |
| Live total | on | "Total: $16.24 (1.25 kg at $12.99 / kg)" on product pages |
| Remove data on uninstall | off | Delete the settings and the product/category settings when the plugin is deleted |
| Licence key / Purchase code | empty | See below |
The check runs once a day from the admin area. It sends only the site address and the key or code to kaviolabs.com.
extensions["kv-sell-by-measure"] with the unit, label, decimals and whether the line is sized.No. It uses WooCommerce hooks, the Store API and the checkout filters of the Cart/Checkout blocks. There are no template overrides.
WooCommerce holds stock for unpaid block checkouts in whole numbers. The real stock reduction is exact (1.3).
"Fixed product discount" coupons apply per unit of the quantity ($1 off × 2.5 kg = $2.50), the same as for 2 pieces. Percentage and cart coupons work as usual.
Analytics "items sold" shows whole numbers. WooCommerce Analytics stores items sold as integers. Revenue is exact.
Yes. Only products with a sale unit (their own or from their category) are measured. Choose "Whole items (standard)" to take a product out of its category default.
Variations use the parent product's unit and limits. Each variation has its own price per unit, and the live total follows the selected variation.
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