Races in calendar week 15/2018
All motorsport events on the weekend of 13–15 Apr 2018.
| Circuit | Country | Series |
|---|---|---|
| Bristol (oval) |  USA |
|
| Estoril |  Portugal |
|
| Le Castellet (Paul Ricard) |  France |
|
| Long Beach | USA |
|
| Oschersleben |  Germany |
|
| Rome |  Italy |
|
| Shanghai |  China |
|
| Valencia (Cheste) |  Spain |
|