How Accurate is Fitbit Calories? (Sense, Charge, Versa, Luxe, etc)

In a previous post, we discussed the ability of Fitbit smartwatches and trackers to count the number of calories burned by the body throughout the day and night. This may have left some of you questioning how accurate Fitbit calories are.

In this post, I will address the accuracy of the Fitbit calorie counter, explain how Fitbit tracks calories burned, and discuss why your calories may sometimes be incorrect. So stay with me till the end!

How Accurate are Fitbit Charge, Sense, Versa, Inspire, and Luxe Calories?

In summary, the calorie count results you will see on Fitbit Charge 5, Charge 4, Sense, Sense 2, Versa 3, Versa 4, Inspire 2, Inspire 3, and Luxe are not 100% accurate however, the calories burned results they show can give you an idea of how much calorie the body has burned while active and resting.

You ought to know this, Fitbit smartwatches and activity trackers only approximate calories burned to give you an idea of how many calories the body has burned throughout the day, which is reliable for weight loss.

Tip 1: Even when you sleep or relax Fitbit still detects calories burned. The body still uses calories even when you are doing nothing to sustain functions like digestion, blood circulation, and breathing.

How Does Fitbit Calculate Calories Burned

You might be wondering how Fitbit watches and trackers calculate calories burned all day.

Well, Fitbit knows the number of calories you have burned all day in a very simple way. It will track your heart rate while working out.

Tip 2: Heart rate data is very important to calorie calculation so, it should be as accurate as possible for reliable results.

Fitbit’s algorithm will combine heart rate and activity data with your account details, that is, your age, gender, height, and weight to estimate the number of calories burned throughout the day.

Fitbit also goes ahead and finds your total calories burned. To estimate the total number of calories burned by the body Fitbit will combine the number of calories burned while at rest (Basal Metabolic Rate; BMR) and the number of calories burned when you are active.

How does Fitbit estimate your BMR? To estimate your Basal Metabolic Rate (BMR) Fitbit will use your age, gender, height, and weight.

Fitbit Showing More Calories Burned

A few Fitbit users say sometime Fitbit shows they have burned many calories, which they doubt. So, why would Fitbit show you’ve burned more calories?

Well, it is possible Fitbit is telling you you’ve burned 1,000 or 3,000 calories because you have. When you workout so hard Fitbit tends t overestimate your calorie burn.

On the other hand, Fitbit may underestimate or say you are burning fewer calories when you are less active or sedentary. To get Fitbit to stop underestimating and overestimating your calories start your activities moderately and from there you can increase their intensities.

Why are My Calories Wrong on Fitbit? (3 Reasons Calories on  Fitbit are  Inaccurate)

1. The Fitbit App and the Watch Haven’t Synced

If you opened the Fitbit app and you noted the calories burned report is wrong; the report does not match what the watch is displaying then it could mean your Fitbit Watch is yet to sync with the app to update calories burned.

Start by checking if the watch and the app are connected to each other, if they are not connected consider reconnecting them and after they reconnect they should sync and the calories burned results on the Fitbit app should now match the results on the watch.

You can also manually sync your Fitbit device with the app to update the calorie on the app.

2. Your Fitbit Watch is not Placed  on the Wrist Properly

 Remember, for Fitbit to calculate or estimate the number of calories burned it will require your heart rate and activity data plus details like your age, gender, height, and weight.

Therefore, it is likely your calories on Fitbit are wrong because the heart rate data being collected is not accurate because the tracker or smartwatch is loose.

It is important that you make sure your tracker is firm (but of course comfortable) on the wrist for accurate heart rate tracking.

3. You Need to Update Your Weight

Weight is among the details Fitbit uses to estimate the calories burned. As we all know, weight may increase and decrease with time and because of that, you may get the wrong calorie counts on Fitbit.

When you lose or gain weight make sure you update it on the app and that way you should get the correct calorie count report. Always remember, unlike your age, your height and weight don’t automatically update; to update manually yourself.

Green Start on Fitbit Calories

What does the green star on Fitbit calories mean? The green star on Fitbit calories is good news because it will indicate you have done your best and hence achieved your calorie goal.

Final Thoughts

Apart from Fitbit Ace 2 and Ace 3, all other Fitbit devices can estimate calories burned, but the results may not be entirely accurate. For the most precise readings, a controlled environment like a clinical study is necessary. That being said, the calorie data provided by Fitbit is still useful for those trying to lose weight.

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Jashon Kanaiza

I’m Jashon Kanaiza, a lover of life, books, gadgets, and coffee. I spend hours testing, researching, reviewing, and troubleshooting wearable tech by an array of brands. My goal with JayFinity is to help you push your wearable to its limit. From tips to how-to guides to reviews, you deserve the best wearable information – without a paywall behind it.

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