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!

January 10, 2019

Events to check out

This year we want to post links to upcoming events. If your track has an event coming up, let us know and we'll link to it here.

It's early in the season and still winter in most of the US but there is still racing going on. Here are a few at our home track:

Sacramento Raceway - Sacramento, CA

December 31, 2018

Happy New Year

Happy New Year Air Density Online! We hope 2019 will be better than last year.

We've been working on the site all year to make it the best it can possibly be... with more improvements to come in the following year. If you've been wanting to give our online jetting calculator a try, now you can with a free 2 week trial:

Give ProCalc a try

Regardless of how you run your car, we wish you all the best in the year to come.

Last month we did some modifications to the US Track Weather and the International Track Weather pages. There is now a general forecast that will give an overview of the current and day weather. Additionally, in the past, forecasted density altitude was only available for US Tracks. Now, it's available for all tracks on the site.

We also added a couple new tracks to the site:

As always, if you would like your track listed on our site, just contact us and let us know.

December 24, 2018

Happy Holidays from Us to You

Happy Holidays to You!

Happy Holidays to You from!

Happy Holidays from us to you! We are thankful for all our visitors and wish every one of you a joyous holiday season.

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