Races in calendar week 18/2018
All motorsport events on the weekend of 4–6 May 2018.
| Circuit | Country | Series |
|---|---|---|
| Barbagallo (Wanneroo) |  Australia |
|
| Brands Hatch |  Great Britain |
|
| Dover (oval) |  USA |
|
| Fuji |  Japan |
|
| Hockenheim |  Germany |
|
| Le Castellet (Paul Ricard) |  France |
|
| Lexington | USA |
|
| Londrina |  Brazil |
|
| Spa-Francorchamps |  Belgium |
|