Fitbit doesn't calculate anything. It merely reports daily calorie burn for MFP to do that math.

The steps and HR is confusing your math, only the calories matters - 3770 & 3893.
Obviously those others result in certain calories.
You also have to consider what did you manually log in MFP, that effects how much adjustment calories was left.

You can have a hard workout and be very lazy rest the day - and get no positive adjustment.
You could be very active and no workout - and get a big adjustment.
So could have a ton of grocery store shuffle steps and not many calories.
You could have few jumping steps and many calories.
Steps doesn't not equal an exact number of calorie burn.
And that's why they are called an adjustment, not actually exercise calories, even though the math has to treat them as such.

You could do a medium workout during a time you'd normally do a lot of steps - so overall increase isn't that great.

HR-based calorie burn should only be used during exercise - if Fitbit is applying that formula during daily activity then it's inflated calorie burn.
If meds or medical condition cause inflated HR - then you should turn it off.

If you want to see how the math works - read the FAQ, section 2.

If you really wanted an answer with your figures - you'd need to provide the extra info given on that Fitbit adjustment when you click the "i" or hold down on the field on app.
That page has the needed details to do math with.

Makes it easier for the math.

Fitbit daily burn - MFP estimated daily = adjustment

Eating goal + adjustment = new eating goal

Only thing would be if not looking at math for really end of day - hence the requirement for that More Info screen of data saying what the figures are the math is based on.
Time stamp there too required.

rfrenkel77 wrote: »

I can’t make heads or tails out of your conversation. Here is what works. Got mfp; use it to keep your food diary, it’s more advanced and informative then Fitbit food diary. Disable exercise in mfp so it’s not subtracting anything. Done.
Set your goals in Fitbit app, don’t use Fitbit meal input, link it with mfp and it will transfer daily food log into Fitbit. That’s it. Fitbit is your main app that sees calories, the food portion will be provided by mfp and your Fitbit plate will show balance between what you ate and calories burned. If Fitbit app is not updating food close and reopen both apps. They refresh and sync up

how did you disable the exercise in MFP? Thank you!

No I don’t have a premium account. Try logging into the full website, it has more setup options. I don’t see that feature thru my phone. Heybales is correct, the exercise in mfp is meaningless since Fitbit does not see it. I remember disabling exercise because at one point mfp was subtracting by default. I don’t think it’s on default anymore.