Air Density Online

weather calculations for racers

Free Weather Calculations based on weather data you input
Real-time information based on current weather observations at various race tracks.
Jet your car from anywhere with an internet connection

Jan 31, 16 - Major site updates

Over the last month, we have made some major site updates! While these changes will provide a better experience overall, they may have caused a couple of hiccups in the last couple of days. Thanks for your consideration while we make these changes.

A full list of site updates is coming shortly.


Jan 1, 16 - Happy New Year from Air Density Online!

We here at Air Density Online and Racecarbook.com wish you a happy new year! Here's to lots of clear weather, fast driving, and good times ahead!


Dec 21, 15 - We are upgrading the site!

We are currently upgrading to faster and more reliable servers. While we will do everything in our power to make this as smooth as possible, please bear with us in the event of periodic downtime over the next couple of days.


Dec 16, 15 - Try out our online jetting calculator

Did you know we have an online jetting calculator for mechanical fuel injection? Learn more here or try it free for 30 days!


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