# 'Save X% per oz' labels on larger sizes: +41% conversion rate

- Outcome: Won
- Page type: Product page (Ecommerce)
- Elements: Pricing, discounts & savings display, Variant, size & option selectors
- Test run by: [Blend Commerce](https://liftarchive.com/practitioners/blend-commerce/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://blendcommerce.com/blogs/ab-tests-shopify/dynamic-savings-labels-pdp-conversion
- Page: https://liftarchive.com/test/stone-creek-coffee-dynamic-savings-per-oz/

Adding dynamic 'Save X% per oz' labels to the 2 lb and 5 lb bag options lifted conversion rate by 41% and revenue per visitor by 26% for Stone Creek Coffee. Blend Commerce ran the test on one product page, and it reached statistical significance. Average order value fell 10%.

## Result

**+41% conversion rate**

- Conversion rate: +41%, the primary metric. Statistically significant.
- Revenue per visitor: +26%, and add-to-cart rate: +9%.
- Subscription orders per visitor: +117%, and subscription revenue per visitor: +50%.
- Average order value: -10%, a negative result. More subscription orders, which are smaller per order, likely pulled it down.
- A third version that also tagged the 5 lb bag 'Most popular!' improved the same metrics, but by less.

## Control

Picking a bag size on the Cream City Blend page updated the price, but did not say how much a larger bag saved.

## Variant

The 2 lb and 5 lb options showed 'Save X% per oz' labels. The saving and price updated as shoppers changed size or switched between one-time and subscription.

## Why it likely won (our reading)

- Shoppers no longer had to work out the per-ounce maths themselves.
- Seeing a saving at the point of choice makes the decision feel like good value.
- Labels that update with purchase type make the subscription saving clear too, which fits the jump in subscription orders.
- The extra popularity badge did not add more, which suggests the clear saving did most of the work.

## Caveats

This was a single product page in an A/B/C test, and sample size and duration were not shared. Average order value fell 10%, so watch basket size.

## How to run this test

- Hypothesis: If we show a live per-unit saving on larger sizes, then more visitors will buy because they can see the value of each option without doing the maths.
- Primary metric: Conversion rate
- Guardrail: Average order value
- Guardrail: Revenue per visitor
- Guardrail: Share of orders by size
- Who should test it: Stores selling consumables in several sizes, such as coffee, supplements or pet food, where bigger packs cost less per unit. If your sizes are priced evenly per unit, there is no saving to show.

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Credit: Blend Commerce ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/stone-creek-coffee-dynamic-savings-per-oz/).
Usage: Free to use, quote and build on, with credit and a link: name the practitioner or organization that ran the test and link to its LiftArchive page. The results belong to the practitioners who ran and shared them; the summaries and commentary are LiftArchive's.