Wine retailers and IWCA launch free carbon calculator to help wine businesses start measuring emissions

Berry Bros. & Rudd and The Wine Society have joined forces with International Wineries for Climate Action (IWCA) to launch the Carbon Calculation Challenge 2026: an initiative designed to help wineries take a practical first step in measuring their greenhouse gas emissions.

Launching at the London Wine Fair, the initiative, with retailer-backed support, makes IWCA’s greenhouse gas (GHG) emissions calculator freely available to wine businesses of all sizes, anywhere in the world. The tool enables users to measure Scope 1 and Scope 2 emissions, helping businesses understand where emissions arise within their own operations and build confidence in carbon measurement.

The calculator has been deliberately designed as an accessible entry point, for those new to carbon accounting. By focusing on Scope 1 and 2 emissions — areas where data is most readily available and actions are most directly within a business’s control — the Challenge aims to lower the barriers that often prevent wine businesses from getting started with carbon measurement and reduction.

For businesses ready to go further, IWCA already offers free, robust calculators covering Scope 3 emissions, allowing participants to progress towards more complete value‑chain carbon measurement at their own pace.

"Many wine businesses recognise the importance of measuring their carbon footprint but find the process daunting. This Challenge is about making that first step simpler and more achievable, to help the sector move forward."

-Charlotte Hey, Executive Director of IWCA

Supporting producers to get started

Together, Berry Bros. & Rudd and The Wine Society work with hundreds of producers across diverse regions and scales. By backing the Carbon Calculation Challenge, the retailers aim to support producers who want to begin measuring emissions but lack the tools or confidence to do so independently.

“Progress starts with measurement. By working with IWCA and The Wine Society, we’re aiming to make that first step more accessible for producers and to build momentum across the industry.”

-Adam Holden, Head of Positive Impact, Berry, Bros. & Rudd

IWCA will provide guidance and support to participating wineries throughout the Challenge, helping them interpret results, understand emission “hotspots”, and begin exploring practical opportunities for reduction as part of longer‑term climate planning. Participation in the Challenge is voluntary, and businesses retain ownership of their data.

“We often hear from wine businesses that they want to reduce their carbon footprint, but don’t know where to start. This free-to-use carbon calculator tool from IWCA, launched together with The Wine Society and Berry Brothers & Rudd, is an easy way for those businesses to get going – to measure their footprint, identify emission hotspots and put plans in place to reduce.”

-Dom de Ville, Director of Sustainability and Social Impact, The Wine Society

A practical, credibility‑led approach

The Carbon Calculation Challenge is designed to complement, rather than replace, more advanced carbon accounting efforts. It focuses on building familiarity with carbon measurement and creating a shared baseline from which businesses can progress at their own pace.

Sign‑Up Now

Wineries and retailers wishing to take part in the Carbon Calculation Challenge 2026 can access more information and download the calculator here, or contact IWCA for further support.