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 Spanish Grand Prix, sorted by qualifying position.
Pos  Driver                Team                  Weight (kg)

 1.  Jenson Button         Brawn Mercedes        646.0
 2.  Sebastian Vettel      RBR Renault           651.5
 3.  Rubens Barrichello    Brawn Mercedes        649.5
 4.  Felipe Massa          Ferrari               655.0
 5.  Mark Webber           RBR Renault           651.5
 6.  Timo Glock            Toyota                646.5
 7.  Jarno Trulli          Toyota                655.5
 8.  Fernando Alonso       Renault               645.0
 9.  Nico Rosberg          Williams Toyota       668.0
10.  Robert Kubica         BMW Sauber            660.0
11.  Kazuki Nakajima       Williams Toyota       676.6*
12.  Nelson Piquet         Renault               677.4*
13.  Nick Heidfeld         BMW Sauber            676.3*
14.  Lewis Hamilton        McLaren Mercedes      683.0*
15.  Sébastien Buemi       STR Ferrari           678.0*
16.  Kimi Räikkönen        Ferrari               673.0*
17.  Sébastien Bourdais    STR Ferrari           669.0*
18.  Heikki Kovalainen     McLaren Mercedes      657.0*
19.  Adrian Sutil          Force India Mercedes  675.0*
20.  Giancarlo Fisichella  Force India Mercedes  656.0*


* declared weight