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!

Thanks for visiting our site. We provide real-time, historical, and forecast weather data for racing engine tuning. We also provide engine tuning tools for mechancial fuel injected racing engines. We are constantly adding tracks to the site. If you'd like to see your track added to the list, send it over. Learn more about this site and it's creators or read some of the articles we've written.

What's New

January 1, 2021

Happy New Year!

Well... 2020 was a year, wasn't it? Let's just put that behind us.

We are excited for the new year and new opportunities it will bring. We've got some new ideas in development and are looking forward to sharing them down the line.

December 1, 2020

Site Updates – December 2020

Happy Holidays to everyone! We are still adding new tracks to the site. If you don't see your track added, send it over.

November 26, 2020

Happy Thanksgiving from Us to You

We (Bob and Jennifer) wish everyone a happy Thanksgiving. We are thankful for everyone who uses our site and everyone we've interacted with. If you've sent in a question or requested a track, we THANK YOU! It is your interaction that has helped us learn and grow the site into what it is today.

Happy Thanksgiving

Happy Thanksgiving!

view news archive

Thanks for visiting. View the FAQ section for more information about using this site.


© 2021