# Automatic FTP calculation from outdoor ride **URL:** \ **Category:** TrainerRoad Software\ **Created:** [April 27, 2020, 8:05am UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711 "2020-04-27T08:05:14Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![RKCyclist](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/rkcyclist/32/7746_2.png) [@RKCyclist](https://www.trainerroad.com/forum/u/RKCyclist)\ **Post date:** [April 27, 2020, 8:05am UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711/1 "2020-04-27T08:05:14Z")
Hi, I have an outdoor ride from last year in which I held 339W for 20 mins and 346W for 8 mins. After that ride, TR automatically calculated my FTP at 307W, but I have no idea how it got to that. 95% of 339W is 322W and 90% of 346W is 311W. Does anyone have any idea why the discrepancy? ---
**Author:** ![Boombang](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/boombang/32/38989_2.png) [@Boombang](https://www.trainerroad.com/forum/u/Boombang)\ **Post date:** [April 27, 2020, 8:14am UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711/2 "2020-04-27T08:14:54Z")
No, but the typical definition of an FTP is not what you can hold for 20 mins x .95 as a ‘20 minute’ testing protocol typically requires an anaerobic strain ahead of the 20 minute steady state to ensure you are using the right ‘systems’ for the test, i.e. aerobic. ---
**Author:** ![skb](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/skb/32/44856_2.png) [@skb](https://www.trainerroad.com/forum/u/skb)\ **Post date:** [April 27, 2020, 11:36am UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711/3 "2020-04-27T11:36:47Z")
Does TR detect new FTP from outside rides and other workouts? I didn’t know that. Only ever had a new FTP proposed from doing the ramp test. ---
**Author:** ![MI-XC](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/mi-xc/32/12993_2.png) [@MI-XC](https://www.trainerroad.com/forum/u/MI-XC)\ **Post date:** [April 27, 2020, 12:36pm UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711/4 "2020-04-27T12:36:59Z")
It does not. ---
**Author:** ![RKCyclist](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/rkcyclist/32/7746_2.png) [@RKCyclist](https://www.trainerroad.com/forum/u/RKCyclist)\ **Post date:** [April 27, 2020, 12:59pm UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711/5 "2020-04-27T12:59:33Z")
![image](https://global.discourse-cdn.com/trainerroad/original/3X/c/5/c5bec23d27d41417ae88d7724754bd25712cbc27.png) It certainly seems to be calculating my FTP for me. I started using TR a month ago but my FTP history is complete all the way back to before I even owned a power meter - all I have done is import my rides from Strava and it has produced that screenshot. I didn’t even own a power meter in 2014 so why on earth would I have entered 199W. ---
**Author:** ![MI-XC](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/mi-xc/32/12993_2.png) [@MI-XC](https://www.trainerroad.com/forum/u/MI-XC)\ **Post date:** [April 27, 2020, 1:10pm UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711/6 "2020-04-27T13:10:23Z")
> [@RKCyclist](#): > > It certainly seems to be calculating my FTP for me. Going forward TR will not do that. Pulling in past rides as a newcomer TR does grab other FTP tests and the like. Not sure of the exact metrics behind pulling in past Strava rides. I do recall it did something similar for me when I started in July 2018. ---
**Author:** ![RKCyclist](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/rkcyclist/32/7746_2.png) [@RKCyclist](https://www.trainerroad.com/forum/u/RKCyclist)\ **Post date:** [April 27, 2020, 2:00pm UTC](https://www.trainerroad.com/forum/t/automatic-ftp-calculation-from-outdoor-ride/34711/7 "2020-04-27T14:00:54Z")
OK thanks for the info