Kalendaryo ng Karera Sebring International Raceway 2018
| Petsa | Serye ng Karera | Biluhaba | Pangalan ng Kaganapan |
|---|---|---|---|
| 1 Marso - 4 Marso | Porsche GT3 Cup Trophy USA Natapos | Round 1 | |
| 14 Marso - 17 Marso | IMSA SportsCar Championship Natapos | Round 2 | Mobil 1 Twelve Hours of Sebring |
| 9 Nobyembre - 11 Nobyembre | IMSA SportsCar Championship Natapos | Non-championship round |