A full predicted time slip, 60 ft to the finish
Dragstrip Calculator
A real drag-strip slip shows several split times along the way. This calculator predicts the slip for your combination so you know what to expect before you make a pass.
| 60 ft | 1.68 s | |
|---|---|---|
| 330 ft | 4.70 s | |
| 1/8 mile (660 ft) | 7.18 s | 97.3 mph |
| 1000 ft | 9.52 s | |
| 1/4 mile (1320 ft) | 11.20 s | 121.7 mph |
How the splits are estimated
The 1/8-mile and 1/4-mile numbers use the formula-based ET and trap speed (1/8 values scale by 1/1.56 and 0.8). The 60 ft, 330 ft and 1,000 ft splits are rule-of-thumb fractions of the final ET (about 15%, 42% and 85%). They are our simplified approximations and the 60-foot split in particular depends enormously on launch and traction. A 3,200 lb, 450 hp car estimates 11.20 s overall.
The estimate uses the widely published Patrick Hale equations: ET = 5.825 × (weight ÷ hp)1/3 and MPH = 234 × (hp ÷ weight)1/3, with weight in pounds and hp measured at the crank. They are documented, along with the more conservative Huntington (6.290 / 224) and Fox constants, in Stealth316’s horsepower / ET / MPH calculator notes. See the full formulas and sources page.
What each split tells you
- 60 ft shows launch quality. A poor figure means wheelspin or a slow reaction off the line.
- 330 ft shows how the early run is going and how well the car transitions.
- 1/8 mile is both a race distance on its own and a handy check against the finish.
- 1000 ft is the last timing point before the quarter and shows high-speed pull.
- Trap speed is measured over the last 66 ft and reflects power more than launch.
Distances at a glance
| Marker | Feet | Yards | Meters |
|---|---|---|---|
| 60 ft | 60 | 20 | 18.3 |
| 330 ft | 330 | 110 | 100.6 |
| 1/8 mile | 660 | 220 | 201.2 |
| 1000 ft | 1,000 | 333.3 | 304.8 |
| 1/4 mile | 1,320 | 440 | 402.3 |
Frequently asked questions
What is a time slip?
A time slip is the printed or digital record of a drag pass: reaction time, split times, 1/8 and 1/4 ET and trap speed.
Are the 60 ft times accurate?
They are rough. Launch is the most variable part of a run, so treat the 60 ft value as a ballpark only.
What is trap speed?
It is your average speed over the last stretch before the finish line, typically measured on the final 66 feet of the 1/4 mile.
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