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From 2 episodes and 2 videos

Are online TDEE and macro calculators accurate?

Answered by Nikkiey Stott and her guests · Updated

The short answer

Not very, according to Nikkiey. Online TDEE and macro calculators only use your height, age, weight and activity level, so they miss menopause, muscle mass, dieting history and lifestyle. She says they often disagree with each other. Treat any number as a rough starting point and adjust it based on how your body actually responds.

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  1. Nikkiey on why she doesn't recommend calculators and what they leave out

    Plays from 12:49 · Ep. 232: What Is a Maintenance Phase and How Long Should It Last?

  2. Why calculator macros can make you lose or gain during maintenance

    Plays from 1:12 · Video: How to Find Your Real Maintenance Calories After a Cut

  3. Nikkiey on why TDEE calculators disagree and leave you more confused

    Plays from 8:19 · Video: What Is TDEE? The 5 Parts of Your Daily Calorie Burn

  4. Why copying someone else's macros is like wearing their prescription glasses

    Plays from 21:44 · Ep. 347: What Are Macros and How Do I Start Tracking Them?

The full answer

On Ep. 232, Nikkiey explains what a calculator can't see. It doesn't know whether you're going through menopause, how much muscle you carry, how long you've been in a calorie deficit, or what your lifestyle and biofeedback look like. In her TDEE video she adds that the calculators all say different things and can leave you more confused about where to start. Even fitness trackers estimate workout burn with generalized equations that ignore individual differences. She notes that truly precise TDEE measurement happens in research settings, not at home.

In her video on finding maintenance after a cut, Nikkiey says calculator numbers won't carry you through a real maintenance phase. Depending on your body, the same starting number could leave you losing weight or gaining weight. Your needs also shift over time, because building muscle means you need more food. She shares her own example: early in a maintenance phase she dropped weight and was very hungry. She took that as feedback, added 250 calories from carbs and fats, and her weight leveled out. She now eats 500-plus calories above her starting maintenance numbers.

Copying someone else's macros is a bigger miss. On Ep. 347 she compares it to wearing someone else's prescription glasses: close, but almost definitely not right for you.

What she recommends instead:

  • If you use a calculator, treat the result as a starting point. She says you will need to adjust it based on how your body responds.
  • Ideally, work with a coach who looks at your body composition, your history and your lifestyle to estimate your numbers more accurately.
  • On Ep. 347 she suggests setting your protein target first and building from there.

If a calculator number hasn't worked for you, that doesn't mean you failed. The number was a generic estimate. It was never fitted to your body.

From Nikkiey Stott and WarriorBabe's coaching. For education, not medical advice: talk to your doctor about your own health.

Women also ask

More questions →

  • Macros & Macro Tracking

    Do I have to track macros forever?

    No. Nikkiey is clear that you don't have to track macros for the rest of your life. Tracking and weighing your food is a temporary, educational phase that teaches you what real portions of protein, carbs and fat look like. Do it consistently for a couple of years and it becomes second nature.

    Read the answer →

  • Macros & Macro Tracking

    Is tracking macros better than counting calories?

    For most women over 40 who want to change how their body looks, yes. Nikkiey explains that macro tracking isn't an alternative to counting calories; it's the more complete version. Calories alone can get the scale moving, but you'll lose muscle with the fat. Tracking protein, carbs and fat lets you lose fat while keeping muscle.

    Read the answer →

  • Macros & Macro Tracking

    How often should I adjust my macros?

    Give new macros at least three to four weeks before changing anything, Nikkiey says, and often longer. Some women run the same numbers for eight to 16 weeks. Adjust when progress actually stalls, using small cuts of about 125 to 200 calories from carbs and fats. In maintenance, she raises intake every one to two weeks.

    Read the answer →

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