Article C4.5.1
Reference Mass of Driver Establishment
Technical Regulations
Article C4.5.1
Reference Mass of Driver Establishment
Chapter: C4
In Simple Terms
At the start of each F1 season, an official weighs each driver to establish their 'Reference Mass' - essentially their baseline weight for technical regulations. This weight can be updated during the season if the FIA deems it necessary.
- Reference Mass is officially established by the FIA technical delegate at the first race of the championship
- The specific procedure for measuring and recording driver weight is detailed in FIA document F1-DOC-C035
- The reference mass can be changed at any point during the season if circumstances warrant an update
- This weight is used for vehicle technical compliance and balance-of-performance calculations
Official FIA Text
Reference Mass of Driver will be established by FIA technical delegate in accordance with procedure defined in FIA-F1-DOC-C035 at first Competition of Championship. Reference mass may be amended at any time during Championship season if deemed necessary.
reference massdriver weighttechnical regulationsFIA technical delegatechampionship
2026 Season Regulations