---
title: How to Enable Decimal Quantities in WooCommerce
description: Let WooCommerce customers buy fractional quantities such as 0.5 or 1.25, for products sold by weight, length or volume.
url: "https://wpfactory.com/docs/decimal-quantity-utilization/"
updated: "2026-10-05"
category: How to
tags:
  - Min Max Default Quantity for WooCommerce
---

# How to Enable Decimal Quantities in WooCommerce

To let customers buy fractional amounts such as 0.5 or 1.25 in WooCommerce, tick **Decimal quantities** at **WPFactory > Quantity Manager > General** in [Min Max Step Quantity Limits Manager for WooCommerce](https://wpfactory.com/item/product-quantity-for-woocommerce/), then set a decimal step, for example 0.5. It suits products sold by weight, length or volume, and it is free.

![Decimal quantities option in the General section](https://wpfactory.com/wp-content/uploads/pasted-image-0-1-11.png)

## Step by step

1. Go to **WPFactory > Quantity Manager** (also reachable at **WooCommerce > Settings > Product Quantity**).
2. Open the **General** section.
3. Tick **Decimal quantities** (`wpfmmsq_decimal_quantities_enabled`). This lets you use decimal values for minimum, maximum and step quantities.
4. Optionally tick **Decimal quantities in admin order** to allow decimal quantities when creating orders in the dashboard.
5. Click **Save changes**.
6. Open **Quantity Step**, enable the section and set **All products** (or a per-product step) to your increment, for example `0.5`. Without a decimal step, the quantity box still moves in whole numbers.
7. Optionally set a decimal minimum in **Minimum Quantity**, for example `0.5`, and save.

## Options reference

| Label | Section | Option ID | Default | Free/Pro |
| --- | --- | --- | --- | --- |
| Decimal quantities | General | `wpfmmsq_decimal_quantities_enabled` | No | Free |
| Decimal quantities in admin order | General | `wpfmmsq_decimal_quantities_admin_order_enabled` | No | Free |
| Round on add to cart | Advanced | `wpfmmsq_round_on_add_to_cart` | Do not round | Free |
| Round with JavaScript | Advanced | `wpfmmsq_round_with_js` | Do not round | Free |
| Woocommerce block compatibility | Advanced | `wpfmmsq_advance_wc_block_api` | No | Free |

## What changes when decimals are on

- **Quantity box:** accepts values such as 1.5 and moves by your decimal step.
- **Stock:** WooCommerce normally stores stock as whole numbers. Quantity Manager switches stock amounts to decimals (up to 6 places), so ordering 1.5 kg removes 1.5 from stock, and the stock status is recalculated after each change.
- **Step checks:** steps are validated with decimal precision, counting from the minimum quantity.
- **PayPal Standard:** a line with a decimal quantity is sent as quantity 1 with the full line amount, since PayPal only accepts whole quantities.

## Example: fabric sold by the meter

Enable Decimal quantities, set the minimum to `0.5` and the step to `0.25`. Customers can then order 0.5, 0.75, 1, 1.25 meters and so on. Add a price unit such as "per meter" with the [Price Unit section](https://wpfactory.com/docs/woocommerce-price-unit/).

**Important:** WooCommerce's block-based Cart and Checkout do not reliably support decimal quantities yet. If you use decimals, switch your Cart and Checkout pages to the classic (shortcode) versions, `[woocommerce_cart]` and `[woocommerce_checkout]`. See [Decimal Quantities Causing Errors in Cart/Checkout](https://wpfactory.com/docs/decimal-quantity-errors/) if you hit problems.

## If it does not work

- **The box still jumps by 1:** no decimal step is set. Enable Quantity Step and enter a value such as 0.5.
- **Decimals turn into whole numbers in the cart:** **Round on add to cart** or **Round with JavaScript** is set to round. Set both to **Do not round**. Also leave **Woocommerce block compatibility** off, because it casts minimum, maximum and step to whole numbers for block carts.
- **Errors on a block cart or checkout:** switch to the classic cart and checkout shortcodes.
- **Stock looks wrong:** see [Stock update fails with decimal quantities](https://wpfactory.com/docs/decimal-stock-update-issue/).

## FAQ

### Are decimal quantities free?

Yes. Decimal quantities, the admin order option and the rounding options are all free.

### Can I use decimals for only some products?

The setting is store-wide, but a product only accepts decimals if its step is a decimal. Give whole-number products a step of 1 in their **Product Quantity** box to keep them whole.

### What does Round on add to cart do?

It rounds the added quantity to a whole number (round, round up or round down). Use it only if you want decimal input but whole units in the cart.

### Get more control

This feature is free. [Min Max Step Quantity Limits Manager for WooCommerce](https://wpfactory.com/item/product-quantity-for-woocommerce/) Pro adds per-category and per-attribute quantity rules, including decimals. Per-product minimum, maximum and step are free. [See what Pro unlocks](https://wpfactory.com/item/product-quantity-for-woocommerce/).

Need a hand? Our team answers every ticket on the [Quantity Manager support forum](https://wpfactory.com/support/item/product-quantity-for-woocommerce/).

Related articles

- [How to Validate and Auto-Correct Cart Quantities](https://wpfactory.com/docs/woocommerce-validate-auto-correct-quantities/)
- [How to Block Checkout When Cart Quantities Are Wrong](https://wpfactory.com/docs/block-checkout-pages/)
- [How to Set Per Product and Per Category Default Quantities](https://wpfactory.com/docs/item-quantity-defaults/)
- [How to Set Step Quantities Per Category](https://wpfactory.com/docs/category-step-quantities/)
- [How to Enable the WooCommerce Quantity Dropdown](https://wpfactory.com/docs/dropdown-quantity-plugin/)

 

[![Min Max Default Quantity for WooCommerce](https://wpfactory.com/wp-content/uploads/Min-Max-Default-Quantity-for-WooCommerce.webp)](https://wpfactory.com/item/product-quantity-for-woocommerce/)