From the 2009 season, the FIA is making public the weights of the cars, with their fuel load included, following Saturday's qualifying session.
Below is the weight of each car following qualifying for the Brazilian Grand Prix, sorted by qualifying position.
Pos Driver Weight (kg)
1. Barrichello Brawn-Mercedes 650.5
2. Webber Red Bull-Renault 656.0
3. Sutil Force India-Mercedes 656.5
4. Trulli Toyota 658.5
5. Raikkonen Ferrari 651.5
6. Buemi Toro Rosso-Ferrari 659.0
7. Rosberg Williams-Toyota 657.0
8. Kubica BMW-Sauber 656.0
9. Nakajima Williams-Toyota 664.0
10. Alonso Renault 652.0
11. Kobayashi Toyota 671.5*
12. Alguersuari Toro Rosso-Ferrari 671.5*
13. Grosjean Renault 677.2*
14. Button Brawn-Mercedes 672.0*
15. Liuzzi Force India-Mercedes 680.0*
16. Vettel Red Bull-Renault 683.5*
17. Kovalainen McLaren-Mercedes 656.5*
18. Hamilton McLaren-Mercedes 661.0*
19. Heidfeld BMW-Sauber 650.5*
20. Fisichella Ferrari 683.5*
* Declared weight