I've had the same issue - any luck figuring it out? This happened on the 18th for me... I kept seeing the same run over and over - to the point where it said I burned 15,000 calories...

Same here. Yesterday Garmin said i burned 250 during aerobic activity and MFP slapped on 800 extra calorie burn.

I've unlinked them and just keep a spreadsheet with calories in (from MFP) totals netted against calories out totals (From Garmin) It kind of makes choosing a fitness watch based on it's ability to link pointless.

I am having this problem, Garmin and MFP are not playing nice. MFP is telling me I have a crazy amount of calories for today like 2,850. My total burn for today is 3602, that is not a 1000 calorie deficit as it should be. Does anyone know how to fix this?

Activity level plays a huge part in this, the lower your activity level the crazier this goes. Garmin is likely picking up the calories from your heart rate being elevated even after you are done the excercise.

My solution on this was I changed my status to active in MFP, and then enabled a negative calorie adjustment (has to be done on the website). Leaves the floor of your calories a little less obvious but I get a lot less in the way of huge calorie adjustments. I also just dont eat back my calorie adjustment, only the excersice ones if it was a big burn.

I'm having the opposite problem now, and I can see clearly what has happened, though sometimes it corrects at midnight - which isn't really useful for easy math earlier to meet goals.

Garmin's side doesn't increase the daily burn by the amount of a manually added or corrected workout.

Therefore it sends to MFP a daily burn lower than reality.

But it still sends the workout data - which MFP correctly removes from the daily so as not to double-count it.

Except in this case Garmin never had it included - so I'm getting an adjustment that has the workouts removed twice before the math is done.

So yesterday I have a neg 303 adjustment, which it should have been over by some 500 cal.

At least I can take peek at Garmin CI/CO chart and see the difference instantly and math it.
Though I'm still trying to figure out the usefulness of the Net value they give. (when RMR doesn't mean what they say they use it as).

Hi all,
not sure if this is the right place to post, but I am also quite confused with how MFP/GC interact to give a calorie estimate.

I have recently migrated from Fitbit Flex2, which is such a simple device, yet was very good in tracking all sorts of activities. I wasn't taking Fitbit total daily burn estimates as gospel, but I was relying on it to be somewhat accurate, and have lost quite a few pounds in the last year this way (maintaining deficit under Fitbit estimate).

Now, Garmin Vivoactive 3 not only shows a ridiculous amount of total daily burned calories, but the number is buried somewhere in the sidebar of the app, instead of being on My Day tab. Calories In/Out on My Day tab are even higher estimates.

For a short woman my BMR is quite low (around 1350), and I would gain fast all those pounds that I have worked so hard to lose if I were to follow Garmin numbers. So far, it seems to have my BMR about 250 cals higher than it should be, and on top of that gives active calories. The active calories alone seem to be ok, but the starting BMR is high. This is in the "Calories" part of the app.

At Calories In/Out part Garmin app appears to take my MFP goal as a starting point and adds active calories on top of that - resulting in an even higher total daily cals (like 2900 this Sunday!). I have my MFP settings on "Active" and then -250 deficit, maybe I should switch to Sedentary (although that is way off mark) and then Garmin would estimate lower?

How do you people cope with that? Does it improve in accuracy over time? Did you change some settings to make it more accurate? Or is this just my device... I have had Garmin less than a week, still thinking about returning it and buying Charge 3 from Fitbit instead. People claim Garmin's are much more superior devices, which might be true but...I noticed Fitbit has a much larger community here on MFP and seems to work smoothly with MFP.

Confused and slightly dissapointed new Garmin user here

Hi heybales and thank you for answering!
I played a bit with my new watch and discovered more things in the app and I think I'm figuring it out.
The activity calories don't seem very off, I think. I went for a first few walks with the GPS on, to help establish stride length. Otherwise, most of my activities are indoors now.

But what I thought was BMR is definitely higher than any calculator out there, and after some reading on Garmin forums it seems this is intentional. What Garmin Connect reports under "resting" calories is not BMR but more on the level of sedentary TDEE (around 1600 for me)

On the calories In/Out GC app does seem to take MFP numbers but I will just ignore those.

The most important thing for me is that in the end of the day GC sends to MFP reasonable numbers, actually. I have gotten too confused with all the different calorie numbers in the GC apo that I failed to realize this at first.

So all good, false alarm!

Sunday I walked a lot, getting stuff done, but there was little intentional exercise (short treadmill run and few laps in the pool) so most of those active calories came from huge number of steps.
GC said around 1000 active cals and in one part of the app added that to 1900 saying that was MFP daily goal, calculating adjusted goal to 2900 - but as I've said above I will ignore Cals In/Out part of the GC app because it actually sends lower numbers for total daily calories to MFP.