RIO TINTO LTD

The Group presents certain alternative performance measures (non-IFRS measures) which are reconciled to directly comparable IFRS financial

measures below. These non-IFRS measures, hereinafter referred to as alternative performance measures (APMs), are used by management to

assess the performance of the business and provide additional information, which investors may find useful. APMs are presented in order to

give further insight into the underlying business performance of the Group's operations.

APMs are not consistently defined and calculated by all companies, including those in the Group’s industry. Accordingly, these measures used

by the Group may not be comparable with similarly titled measures and disclosures made by other companies. Consequently, these APMs

should not be regarded as a substitute for the IFRS measures and should be considered supplementary to those measures.

The following tables present the Group's key financial measures not defined according to IFRS and a reconciliation between those APMs and

their nearest respective IFRS measures.

Reconciliation of APMs to the nearest comparable IFRS financial measures for the year 2021 and 2020 can be found in the section APM of our

2021 Annual Report. Reconciliation of underlying return on capital employed and Net (debt)/cash for the year 2022 can be found in our 2022

Annual Report.