# Set product weight for shipping

> Give answers and products a weight so weight-based shipping can price delivery.

Source: CBX documentation, version 3.x (released). Canonical page: https://docs.configbox.at/docs/admin-guide/pricing/weight-and-shipping-weight. Last updated 2026-08-01.

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> **Audience:** store admins · **Scope:** the weight that drives weight-based shipping · **Last reviewed:** 2026-07-23

**What this does** — Weight is what weight-based shipping prices delivery from. Each **answer**
can add weight, and the product carries a base weight; CBX sums them for the configured
product and hands the total to the shipping calculation.

## Before you start

- **Shipping must be on.** If **Disable Shipping** is ticked in **Settings**, weight is
  irrelevant and its fields don't matter — see
  [tour the Settings sections](https://docs.configbox.at/docs/admin-guide/settings/tour-the-settings-sections).
- Know your store's **weight unit** (set in **Settings**, Configurator section — here **kg**) and
  enter every weight in it consistently.

## Steps

1. Open an answer, expand its **Price, SKU and Weight** section, and enter the **Weight** field —
   the amount this choice adds to the configured product's total, in the store's weight unit:

   ![The answer's Weight field](img/weight-answer.jpeg)

   Here the "Linen" fabric answer weighs **0.2 kg** (Cotton 0.18, Silk 0.15).
2. **Save**, and repeat for the answers whose choice changes the shipping weight.
3. Give the **product** its base/shipping weight on the product form — the fixed weight the item
   always has before any answer adds to it.

## What happens next

At checkout, CBX adds the product's base weight and every selected answer's weight, then
the shipping method prices delivery from that total (by weight band and zone). The customer sees
the resulting shipping cost in the cart and the live summary if you enabled it.

## Good to know

- **Weight works just like price**: static per answer, or **computed by a calculation** when the
  weight depends on the configuration (e.g. area × density). Attach a weight calculation the same
  way you attach a price one — see [build a calculation](https://docs.configbox.at/docs/admin-guide/pricing/build-a-calculation).
- Keep the unit consistent — the store has one weight unit; mixing grams and kilograms silently
  wrecks shipping bands.
- Weight is separate from price: an answer can add weight without adding cost, and vice versa.
- No shipping method reacting to weight? Check the method's weight bands in the commerce system,
  and that shipping isn't disabled in **Settings**.