1/8th Mile ET and MPH Calculator
Estimate your drag racing performance in the 1/8th mile distance. Calculate elapsed time (ET), speed (MPH), and required horsepower.
Performance Results
1/8th Mile Elapsed Time (ET):
0.00 seconds
1/8th Mile Speed (MPH):
0.00 mph
Approximate 1/4 Mile ET:
0.00 seconds
Approximate 1/4 Mile MPH:
0.00 mph
1/8th Mile Drag Racing Performance Calculator
Our 1/8th Mile ET and MPH Calculator helps drag racers estimate their vehicle's performance in the 1/8th mile distance. Whether you're racing a street car, muscle car, or dedicated dragster, this tool provides accurate estimates of your elapsed time (ET) and speed (MPH) based on weight, horsepower, and other key factors.
Why Use a 1/8th Mile Calculator?
Many drag strips use the 1/8th mile format because it requires less space and is safer for beginners. Calculating your 1/8th mile performance helps:
- Predict race outcomes before hitting the track
- Compare different vehicle setups
- Understand how weight reduction affects performance
- Plan horsepower upgrades
1/8th Mile Calculator FAQs
1. How accurate is this 1/8th mile calculator?
Our calculator provides estimates within 5-10% of actual track times for most vehicles. Real-world performance depends on traction, weather conditions, and driver skill.
2. What's a good 1/8th mile time for a street car?
Most street cars run 9.0-11.0 seconds in the 1/8th mile. Performance cars typically run 7.5-9.0 seconds, while dedicated drag cars can run under 7 seconds.
3. How do I calculate 1/4 mile times from 1/8th mile results?
Multiply your 1/8th mile ET by 1.56 for an approximate 1/4 mile time. Multiply 1/8th mile MPH by 1.25 for estimated 1/4 mile speed.
4. Why does my calculator result differ from actual track times?
Differences can occur due to altitude, humidity, track surface, tire pressure, and launch technique. Our calculator assumes ideal conditions.
5. How much does weight affect 1/8th mile performance?
Reducing weight by 100 lbs typically improves ET by 0.1 seconds in the 1/8th mile. This varies based on the vehicle's power-to-weight ratio.
6. What's better for 1/8th mile racing: horsepower or traction?
Traction is crucial for 1/8th mile racing. Many races are won or lost in the first 60 feet. Balance both for optimal performance.
7. How does altitude affect 1/8th mile times?
Expect about 3% power loss per 1,000 feet of elevation. At 5,000 feet, a 10-second car may run 10.3-10.5 seconds.
8. What's the fastest 1/8th mile time ever recorded?
Top Fuel dragsters can complete the 1/8th mile in under 3 seconds at over 300 mph. For street-legal cars, times under 6 seconds are exceptional.
9. How do I convert 1/8th mile to 1/4 mile horsepower?
Use our calculator in reverse: Enter your 1/8th mile ET and MPH to estimate required horsepower at the wheels.
10. What's more important for 1/8th mile: ET or MPH?
ET determines who wins the race, while MPH shows your car's potential. High MPH with poor ET suggests traction issues.
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