# TSS estimated on calender incorrect **URL:** \ **Category:** TrainerRoad Software\ **Created:** [September 30, 2018, 8:28pm UTC](https://www.trainerroad.com/forum/t/tss-estimated-on-calender-incorrect/1828 "2018-09-30T20:28:42Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Saintb](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/saintb/32/1364_2.png) [@Saintb](https://www.trainerroad.com/forum/u/Saintb)\ **Post date:** [September 30, 2018, 8:28pm UTC](https://www.trainerroad.com/forum/t/tss-estimated-on-calender-incorrect/1828/1 "2018-09-30T20:28:43Z")
I think there is an issue with the TSS estimation calculator when inputting a manual entry in the calender. As you increase the time, the TSS per hour reduces for the same effort ie. 1 hour easy is 36 TSS therefore, you would think 2 hours would be 72 TSS and 10 hours would be 360 TSS but it is not. It shows as 67 for 2 hours and 260 for 10 hours. This shows the calculations are wrong and are only exacerbated the longer the exercise period. A case in point, once you get to 36 hours plus it estimates TSS as a minus figure. ---
**Author:** ![ErnestBoskovic](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/ernestboskovic/32/7569_2.png) [@ErnestBoskovic](https://www.trainerroad.com/forum/u/ErnestBoskovic)\ **Post date:** [September 30, 2018, 9:02pm UTC](https://www.trainerroad.com/forum/t/tss-estimated-on-calender-incorrect/1828/2 "2018-09-30T21:02:50Z")
Wanted to add one more thing to comment above. TR ‘gives’ the estimate of 100 TSS for All-out effort (scale 10) for 1h bike activity ![TR%20intensity](https://global.discourse-cdn.com/trainerroad/original/2X/b/b3778d63b98d1beea9fba4f3b287b219bc4a2b98.jpeg) ---
**Author:** ![ErnestBoskovic](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/ernestboskovic/32/7569_2.png) [@ErnestBoskovic](https://www.trainerroad.com/forum/u/ErnestBoskovic)\ **Post date:** [October 5, 2018, 2:14pm UTC](https://www.trainerroad.com/forum/t/tss-estimated-on-calender-incorrect/1828/3 "2018-10-05T14:14:30Z")
Hi there TR 🙂 Is there any particular reason of this non-linear relationship between TSS value and the duration? Thank you! Ernest ![image](https://global.discourse-cdn.com/trainerroad/original/2X/1/1cfb4973964e4bbd6d6aec44024071d0f1149ec5.png) ---
**Author:** ![larry](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/larry/32/12653_2.png) [@larry](https://www.trainerroad.com/forum/u/larry)\ **Post date:** [October 5, 2018, 4:57pm UTC](https://www.trainerroad.com/forum/t/tss-estimated-on-calender-incorrect/1828/4 "2018-10-05T16:57:26Z")
That’s simply part of the formula. I’ll try my best to explain this one, but it’s a little tricky so bear with me! A 3-hour ride at “race pace” cannot be completed as fast as a 1-hour “race pace” ride. The non-linear relationship between TSS and Duration is a function of how the longer you go, the “harder” it is at a slower pace. For example, 1 hour at race pace (RPE 9) is 90 TSS, but 3 hours at RPE 2 is still 98 TSS. It might not be as extreme of a ride, but it’s just as hard. To put it in other words, your TSS/hour is lower but it feels hard because you rode for three hours. The negative TSS issue on rides past 36 hours is a bug, we’ll get that fixed soon (hopefully before anyone needs to estimate TSS on a ride that long 😉 ). ---
**Author:** ![ErnestBoskovic](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/ernestboskovic/32/7569_2.png) [@ErnestBoskovic](https://www.trainerroad.com/forum/u/ErnestBoskovic)\ **Post date:** [October 7, 2018, 8:57am UTC](https://www.trainerroad.com/forum/t/tss-estimated-on-calender-incorrect/1828/5 "2018-10-07T08:57:37Z")
Larry, thank you for your answer. I get that one about the feeling ’ harder’ as the times goes by, because of the fatigue, but what about the short activities like 5min Level 10. I see an 8TSS/5min (rate of 96TSS/h)? Thanks, Ernest ---
**Author:** ![BiscuitBarrel](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/biscuitbarrel/32/7725_2.png) [@BiscuitBarrel](https://www.trainerroad.com/forum/u/BiscuitBarrel)\ **Post date:** [January 22, 2019, 7:30pm UTC](https://www.trainerroad.com/forum/t/tss-estimated-on-calender-incorrect/1828/6 "2019-01-22T19:30:14Z")
I was just about to raise a bug on exactly what you mentioned. I was sketching out my plan leading up to Paris-Brest-Paris (1200km to be completed in 80-90h) in August '19 and discovered I would have a circa -5000 TSS. Had to set the intensity as custom with a 0 TSS to be able to save it.