TL;DR
- MyFitnessPal does not compute a true TDEE. It returns a daily calorie goal from a Mifflin-St Jeor BMR estimate times a fixed activity multiplier, then expects you to log exercise separately and add it back.[1]
- The formula underneath is accurate to within 10% of measured resting metabolism for roughly 70-82% of people, which is good for a starting point and useless as a precise number for any one person.[3]
- The number is a hypothesis, not a measurement. Your real expenditure is whatever keeps your weight trend flat over two to three weeks of honest logging.
- Barcode scanning, custom macro goals, and an ad-free diary are Premium-gated; the calorie goal itself is free.[4]
The honest answer to "is MyFitnessPal's TDEE accurate?" is that MyFitnessPal never gives you a TDEE in the first place. What the goal wizard produces is a daily calorie target built from a textbook resting-metabolism formula and an activity bucket you pick yourself. That distinction is the whole story, so it is worth getting precise about what the app does and where the error lives.
What MyFitnessPal actually calculates
During goal setup, MyFitnessPal estimates your basal metabolic rate (BMR) with the Mifflin-St Jeor equation from your sex, age, height, and weight, then multiplies that BMR by an activity factor tied to the lifestyle level you select.[1] A "lightly active" choice maps to a higher multiplier than "sedentary," and so on. The result, minus your chosen weekly deficit, is your daily calorie goal.
Two design decisions matter for accuracy. First, the activity level you pick is meant to capture your baseline daily movement, not your workouts. Intentional exercise is logged separately, and MyFitnessPal adds those calories back onto your goal for the day.[1] Second, the deficit is applied as a flat subtraction (the wizard targets roughly 500 kcal/day per half-kilo per week of intended loss). Neither step measures your metabolism; both estimate it.
How accurate is the formula underneath?
Mifflin-St Jeor is the equation most dietitians reach for because it generalises better than the older Harris-Benedict formula.[2] Frankenfield and colleagues tested the major resting-metabolic-rate equations against indirect calorimetry and found Mifflin-St Jeor predicted resting energy within 10% of measured values in more individuals than any competitor, landing in that band for about 70-82% of people depending on body size.[3]
Read that the right way. A 10% band on a 1,600 kcal resting rate is roughly ±160 kcal before you even apply an activity multiplier, and the multiplier itself is a coarse bucket. For one in five people the formula misses by more than 10%. So the calorie goal is a defensible first estimate for a population, and a guess for the individual sitting in front of the screen.
If you want to see the same Mifflin-St Jeor math broken out with an explicit activity multiplier rather than buried in an app wizard, our TDEE Calculator shows each step and lets you swap the activity factor to see how much the bucket alone moves the answer.
The fix is the same regardless of starting number
Because no formula can read your actual expenditure, the only accurate TDEE is the one you back into from data. Log honestly for two to three weeks, weigh yourself daily, and track the weekly average. If the average is flat at a known intake, that intake is your maintenance. From there, a deliberate deficit is arithmetic.
This is exactly where the static-formula apps differ from adaptive trackers. MyFitnessPal hands you a fixed goal and leaves the recalibration to you; an adaptive expenditure model does the weight-trend regression automatically. If that loop is what you want automated, the MyFitnessPal vs MacroFactor comparison covers the trade.
Free vs Premium in 2026
The calorie goal, food logging, and the food database are free. As of October 2022 the barcode scanner moved behind a subscription, and custom macro targets, multi-day logging, voice logging, and an ad-free diary are Premium features.[4]
| Feature | Free | Premium |
|---|---|---|
| Calorie goal + food diary | Yes | Yes |
| Barcode scanner | No (Premium since Oct 2022)[4] | Yes |
| Custom macro goals (gram targets) | No | Yes[4] |
| Ad-free experience | No | Yes[4] |
| Price (Premium, annual) | €0 | €79.99/yr as listed on the official page[5] |
Verified as of 2026-05-25. Pricing read from the official MyFitnessPal subscription page, which displayed Premium at €79.99/yr and Premium+ at €99.99/yr (or €24.99/mo) for our region;[5] the page is region-priced, so your local currency and figure may differ. Treat the exact number as a regional snapshot, not a universal price.
The verdict
MyFitnessPal's calorie goal is a reasonable, formula-based starting estimate and an unreliable precise number, because it is a Mifflin-St Jeor projection rather than a measurement of your metabolism.[3] Use it to begin, then let two to three weeks of weight-trend data tell you the real figure. The accuracy you actually care about comes from your own logging, not from the wizard.
FAQ
Does MyFitnessPal calculate TDEE?
Not directly. It estimates BMR with Mifflin-St Jeor, multiplies by an activity factor you choose, and produces a daily calorie goal. Logged exercise is added back on top, so the displayed goal behaves like a baseline-expenditure target rather than a full TDEE figure.[1]
Why is my MyFitnessPal calorie goal different from an online TDEE calculator?
Because the activity multiplier and whether exercise is added back differ between tools. MyFitnessPal keeps daily activity and logged workouts separate; many standalone TDEE calculators fold an estimate of training into a single multiplier. Same formula, different bookkeeping.
Is the barcode scanner free in MyFitnessPal in 2026?
No. Barcode scanning has required a Premium subscription since October 1, 2022. Manual search and the food diary remain free.[4]
How do I make MyFitnessPal's number actually accurate for me?
Treat the goal as a hypothesis. Log honestly for two to three weeks, track your weekly average bodyweight, and adjust intake until the trend matches your goal. The intake that holds your weight flat is your true maintenance, regardless of what the formula predicted.
References
- 1 How to Calculate Your Caloric Needs (calorie-goal methodology) — MyFitnessPal Blog (2024)
- 2 A new predictive equation for resting energy expenditure in healthy individuals (Mifflin-St Jeor) — American Journal of Clinical Nutrition (Mifflin et al.) (1990)
- 3 Bias and accuracy of resting metabolic rate equations in non-obese and obese adults — Clinical Nutrition (Frankenfield et al.) (2013)
- 4 What are the features of MyFitnessPal Premium? — MyFitnessPal Help Center (2026)
- 5 MyFitnessPal Premium subscription plans and pricing — MyFitnessPal (2026)