Turn your build's power and weight into a real 1/8 and 1/4 mile prediction — traction reality checked, not just a formula.
01
Set up the run
Easy mode for a quick number, Pro mode for the full picture.
Mode
Chassis
Wheel horsepower
Total weight (with driver)
Tire
Launch quality
Drivetrain loss (crank → wheel)
Actual 60-foot time
Track elevation (density altitude)
02
Predicted times
1/8 mile ET
—sec
1/8 mile trap
—mph
1/4 mile ET
—sec
1/4 mile trap
—mph
03
Stage and launch
Tap LAUNCH the instant it turns green. Jump it and you're done — that's how the tree works.
Tap to stage.
04
Log this pass
Goes to the real shared leaderboard — your tag is remembered on this device so you don't retype it every time.
Driver / car tag
05
Leaderboard
Sample data plus anything you've logged on this device — a real shared board is next once the backend's live.
#
Driver
Combo
1/4 ET
Trap
Tier
06
Your progression
Every pass you've logged on this device, in order.
ET and trap speed are estimated from power-to-weight using standard drag-racing approximations — real results depend on driver skill, track prep, and tune, and will vary from these numbers. The leaderboard above is a real, shared board — most passes publish immediately, but an extreme power-to-weight claim with no evidence gets held for a human to check before it appears. Your progression below still stays local to this browser until accounts exist.