# SOLVED: Glitch in the eFTP calculations **URL:** \ **Category:** Bug Reports\ **Created:** [30 April 2026 12:46 UTC](https://forum.intervals.icu/t/solved-glitch-in-the-eftp-calculations/128485 "2026-04-30T12:46:29Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![nasatt](https://forum.intervals.icu/user_avatar/forum.intervals.icu/nasatt/32/29315_2.png) [@nasatt](https://forum.intervals.icu/u/nasatt)\ **Post date:** [30 April 2026 12:46 UTC](https://forum.intervals.icu/t/solved-glitch-in-the-eftp-calculations/128485/1 "2026-04-30T12:46:30Z")
Long story short - Haven’t been training for a long time (on and of 18 months) In first block back. Getting eFTP notifications now too. First off, I know these are only estimates. I know the numbers given are not reflective of actual FTP. I know that the model can only estimate based on the data it’s given. And I know I haven’t fed it a full range of data. Nor will I be doing anytime soon. All that said, there is a definite bug in the estimations as I see it. Tuesday April 21st I did a 20/15/10 session and was given an estimated FTP of 235w. This was based off “FTP +29 to 235w from 25m at 242w” So it has established now that I can at least do 25 minutes at 242 watts. Roll on to Saturday April 25th where I did a different session. 20min tempo blocks. After this I got “FTP +5 to 216w from 20m at 228w” So on the Tuesday I was given an eFTP of 242w but on the following Saturday I was told my FTP was increasing +5 to 216w. Clearly something not quite right with the matrix there! I don’t pay any heed to these estimations. Like I said already, garbage in, garbage out. But this is clearly a bug which I thought I’d report in case anyone does use this feature and want more accurate results. @david - fell free to look through my data if you need to. I have no issues with that. ---
**Author:** ![MedTechCD](https://forum.intervals.icu/user_avatar/forum.intervals.icu/medtechcd/32/40383_2.png) [@MedTechCD](https://forum.intervals.icu/u/MedTechCD)\ **Post date:** [30 April 2026 13:04 UTC](https://forum.intervals.icu/t/solved-glitch-in-the-eftp-calculations/128485/2 "2026-04-30T13:04:30Z")
As long as you don’t ‘accept’ the new FTP, the former one will stay in place. ![image](https://forum.intervals.icu/uploads/default/original/3X/a/6/a60cbcfecab74f117fe4e378ea5c646f63a5bc8b.png) ---
**Author:** ![nasatt](https://forum.intervals.icu/user_avatar/forum.intervals.icu/nasatt/32/29315_2.png) [@nasatt](https://forum.intervals.icu/u/nasatt)\ **Post date:** [30 April 2026 13:06 UTC](https://forum.intervals.icu/t/solved-glitch-in-the-eftp-calculations/128485/3 "2026-04-30T13:06:01Z")
Ah! That makes sense. Thanks. ---
**Author:** ![Gerald](https://forum.intervals.icu/user_avatar/forum.intervals.icu/gerald/32/28423_2.png) [@Gerald](https://forum.intervals.icu/u/Gerald)\ **Post date:** [21 October 2026 20:34 UTC](https://forum.intervals.icu/t/solved-glitch-in-the-eftp-calculations/128485/4 "2026-10-21T20:34:24Z")
While this doesn’t answer your original post, it’s related to eFTP, and perhaps some more. If you want your FTP automatically updated to match your eFTP, I have an app linked to Intervals that will do it, based on a few settings (daily, when it changes by more than the daily variance tolerance, or never). While I don’t use it, it’s there for people that want it. It’s configurable in the settings, as a once off and forget. Look for [BaieSukkel AutoMate](https://connect.baiesukkel.co.za/) in the Apps section of Settings page. No username and password required, as it only gets/updates data from your Intervals account. The core principle is automating certain data fields and phone notifications to close out missing data important to you. ![image](https://forum.intervals.icu/uploads/default/original/3X/f/a/fa0f79732547d16d21ef0c559b5d04d7108603f3.png) ---
**Author:** ![system](https://forum.intervals.icu/uploads/default/original/2X/3/32d8cede8be43c6426d605a6fbf0e65788ad51ae.png) [@system](https://forum.intervals.icu/u/system)\ **Post date:** [28 October 2026 20:35 UTC](https://forum.intervals.icu/t/solved-glitch-in-the-eftp-calculations/128485/5 "2026-10-28T20:35:11Z")
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