Autocross PAX Calculator

A PAX factor compresses your raw time so drivers in slower, less-modified classes can be compared fairly against drivers in faster, more-modified classes. Faster classes like Super Street get a lower multiplier (0.819) because their cars are already quick, while classes like G Street get a higher multiplier (0.856) to offset their inherently slower raw pace — the multiplication brings all classes onto roughly the same competitive scale.

Each cone adds a flat 2 seconds to your raw time before the PAX factor is applied, so the actual cost in PAX time is 2 seconds multiplied by your class's factor — for example, about 1.68 seconds in Super Street (0.819) versus about 1.71 seconds in G Street (0.856). The penalty is applied before the multiplication, not after, so it scales slightly with your class's factor rather than staying a flat 2 seconds all the way through.

The calculator uses 999 seconds as a fixed placeholder value specifically so a DNF run always sorts as the slowest possible result relative to any completed run, without needing special handling elsewhere in the comparison. It doesn't reflect any actual timed distance — it's simply larger than any realistic PAX time you'd see from a completed course.

No — the eight class factors built into this calculator are fixed approximate values for commonly run classes, and SCCA periodically republishes updated PAX indices, sometimes mid-season. If you're competing in a less common or regional class, or the indices have been revised since this calculator was built, check SCCA's official PAX table for the exact current value for your class.