Air Density Online

weather calculations for racing engine tuning


Jet your car from anywhere with an internet connection. Have a smartphone? You now have a portable jetting calculator.

for tracks

Real-time density altitude from current weather data at various tracks including: NHRA & IHRA dragstrips, road courses, dirt ovals.


Get your MFI fuel system setup programmed into ProCalc. Even get your dyno data added. You get 1 year of access to ProCalc too!

July 11, 2019

New article in Dragzine

Our latest article just came out in Dragzine about track prep and the weather. Check it out.

Be Ready for Race Day by Reading the Weather.

If you haven't checked before, we list this and all articles we've written on our articles page.

And if you want even more information, check out Over there, you can get much more information about high performance engine tuning.

July 1, 2019

What’s new in June

This month we are partnering with Kestrel Instruments to bring you weather at all our tracks. The weather on our site is updated every 20 minutes. If you've ever wanted targeted, up-to-the-minute weather, check them out!

Here are the tracks added in June. If you don't see your track listed, let us know and we'll add it to the site.

June 25, 2019

Check out our latest article for EngineLabs

Do you have problems with detonation in your engine? Check out our latest article for

Misunderstood Causes of Denotation in High Performance Applications
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