How accurate is this estimate?

The Huntington formula is within 0.3-0.5 seconds for most cars. Real results depend heavily on traction, launch technique, gearing, and conditions. Turbocharged cars often perform better than predicted.

What is a fast quarter mile time?

Under 12 seconds is fast for a road car. Under 10 seconds is very fast. Production car records are around 8-9 seconds for hypercars. A typical family car runs 16-18 seconds.

What does trap speed mean?

Trap speed is your speed as you cross the finish line. It is a better indicator of outright power than ET, which is more affected by traction and launch. Higher trap speed = more power at the wheels.

Does weight or power matter more for the quarter mile?

Both matter equally since the formula uses a cube root of the weight-to-power ratio. However, in practice, traction is the biggest limiting factor. A lighter car with good grip will often beat a heavier car with more power. Weight reduction also improves braking and handling.

Where can I legally test my quarter mile time in the UK?

UK drag strips include Santa Pod Raceway in Northamptonshire (the main UK venue), Shakespeare County Raceway, and York Raceway. Many offer "run what you brung" events open to road cars. Never test acceleration on public roads — it is dangerous and illegal.

CarCalcs

Quarter Mile Calculator

Estimate quarter mile time and trap speed from power and weight.

Power

Power in BHP

Kerb Weight

Vehicle weight (check V5 document)

How We Calculate This

Uses the Roger Huntington formula: ET = 5.825 x (Weight/Power)^(1/3) and trap speed = 234 x (Power/Weight)^(1/3).

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Actual figures may vary based on driving conditions, vehicle specifications, and other factors.