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!

November 12, 2018

How to use weather in your engine tuning

Recently we wrote an article for In it, we take the weather for an event at Texas Motorplex and analyze how that might affect an engine tune-up. It's a pretty informative article that could shed some light on how to utilize weather data at the track. Check it out:

Air Density Tuning Elite 12 ProMods Drag Racing @ Texas Motorplex Nov. 1-3 2018

November 5, 2018

What’s new with us – November 2018

Fall is in full force. We are now working on adding historical weather data to the site. That is one of the most common requests.

Several more tracks were added last month, including tracks from all over the world. If you race at a track you don't see listed, let us know and we'll add it.

October 29, 2018

Past weather helps analyze your runs

Analyzing the weather conditions in your past runs helps determine what works and what doesn't work in your setup. If you want to add historical weather data to your analysis, check out this article we wrote:

Historical Weather Data

We are working on features that will allow users to check historical weather data as needed. This is part of a larger overhaul of our racing weather section. Around the new year we will be launching these new features.

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