# Two-column filter layout on desktop: +21.9% conversion rate

- Outcome: Won
- Page type: Collection page (Ecommerce)
- Elements: Filters, sorting & site search, Layout, fonts & visual design
- Test run by: [Clean Commit](https://liftarchive.com/practitioners/clean-commit/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://cleancommit.io/ab-tests/two-column-filters-layout/
- Page: https://liftarchive.com/test/cleancommit-two-column-filters-layout/

Splitting desktop collection pages into a sticky filter sidebar and a product grid lifted conversion rate by 21.9% and add-to-cart rate by 7.6%. Clean Commit ran this test for an anonymized Shopify store across 12,251 visitors, nearly all on desktop, over 9 days. The add-to-cart lift, the test's main metric, was statistically significant.

## Result

**+21.9% conversion rate**

- Add-to-cart rate rose 7.6%, a statistically significant result on the main metric.
- Conversion rate rose 21.9%, and orders rose 20.7%.
- Revenue per visitor rose 49.1%, with average order value up 22.6%.
- Bounce rate fell 9.2%.

## Control

Desktop collection pages used the store's original layout, without a separate filter column.

## Variant

Desktop collection pages showed filters in a sticky sidebar taking up to a third of the width, with products in the rest. Shoppers could hide the filters, and mobile stayed the same.

## Why it likely won (our reading)

- Filters that stay in view make it easy to narrow results without scrolling back up.
- Separating filters from products makes the page feel more organized and easier to scan.
- Letting shoppers hide the sidebar gives back space for those who just want to browse.

## Caveats

The test ran only 9 days, so the revenue figures may settle lower over time. Only the add-to-cart lift was reported as significant.

## How to run this test

- Hypothesis: If we put filters in a sticky sidebar beside product results on desktop, then add-to-cart rate will rise because shoppers can refine results without losing their place.
- Primary metric: Add-to-cart rate
- Guardrail: Conversion rate
- Guardrail: Revenue per visitor
- Guardrail: Filter usage rate
- Who should test it: Stores with large catalogs and plenty of filterable attributes, with meaningful desktop traffic. Small catalogs with few filters will likely see little benefit.

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Credit: Clean Commit ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/cleancommit-two-column-filters-layout/).
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.