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· 4 min read
Top 3 TDEE Calculator Alternatives Worth Using
Heshan Fernando
Co-founder & COO
You want a number: roughly how many calories you burn in a day, based on your age, sex, height, weight, and how active you actually are.
A lot of TDEE calculators wrap that single number in a full coaching funnel — meal plan upsells, supplement recommendations, or an email capture before you see your result.
How to judge a TDEE calculator tool
Uses a defensible formula. Mifflin-St Jeor is generally considered the most accurate common BMR formula for most healthy adults; a calculator should say which one it uses.
Covers the full activity range. From sedentary to very active, with clear descriptions of what each level actually means day to day.
Free tier gives the real number. No hiding the calorie result behind an email signup or a paywall.
Shows how it changes across activity levels. Seeing your TDEE at every activity level, not just the one you picked, helps you sanity-check the estimate.
The comparison
| Tool | Best for | Free tier | Watch out |
|---|---|---|---|
| Legion Athletics | Science-backed framing, Mifflin-St Jeor | Free, no signup | Site pushes its own supplement/coaching brand |
| tdeecalculator.net | BMI, BMR, and macros in one result | Free, no signup | Formula used isn’t stated on the page |
| Forbes Health | Expert-reviewed, editorial context | Free, no signup | Sits inside a long article, not a standalone tool |
| TDEE Calculator | Fast result across every activity level | Free, no signup | No macro breakdown built in |
Facts checked August 2026; tools change their plans.
Legion Athletics
Legion’s calculator uses the Mifflin-St Jeor equation, based on age, sex, body weight, height, and activity level, and is framed as one of the more accurate common TDEE formulas for most people.
It isn’t for someone who wants a completely brand-neutral tool — the site is run by a supplement and coaching company, and its content points back to that business.
tdeecalculator.net
This calculator returns BMI, BMR, macros, and TDEE together with a pie-chart visualization, across five activity levels from sedentary office work to twice-daily athlete training.
It isn’t for someone who wants transparency about the method — the page doesn’t state which BMR formula it’s using under the hood.
Forbes Health
Forbes Health’s calculator comes with editorial review from health experts and clear explanation of what TDEE measures over a 24-hour period, lending it some outside credibility.
It isn’t for someone who wants a standalone tool — the calculator is embedded partway down a long article, so you’ll scroll past explanatory content to reach it.
TDEE Calculator
Our calculator takes age, sex, height, weight, and activity level, and shows your TDEE at your selected level plus how it shifts across every other activity level for comparison — all in your browser.
A real limitation: it doesn’t break the result into protein, carb, and fat macro targets — for that, you’d pair it with a dedicated macro calculator.
Which one to pick
If you want your TDEE plus how it changes across every activity level in one view, use our TDEE Calculator.
If you want macros and BMI calculated alongside TDEE in a single result, use tdeecalculator.net.
If editorial credibility matters more than a standalone tool, use Forbes Health.
If you want a result framed around the Mifflin-St Jeor formula specifically, use Legion Athletics.
How to do it with TDEE Calculator
- Open the TDEE Calculator.
- Enter your age, sex, height, weight, and activity level.
- Read your daily calorie burn, along with how it changes at every other activity level.
Browse the full tools directory for more free, browser-based health calculators.
You might also need
TDEE tells you how many calories to eat; it doesn’t say how to split them. Our Macro Calculator takes a daily calorie target and breaks it into protein, carb, and fat grams tuned for losing fat, maintaining, or building muscle.
Frequently asked questions
Is there a free TDEE calculator that doesn’t need an account?
Yes. Our TDEE Calculator and all three alternatives here give a result without requiring signup or an account.
What’s the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest just to function. TDEE (Total Daily Energy Expenditure) takes BMR and multiplies it by an activity factor to estimate total calories burned in a day, including movement and exercise.
How accurate is a TDEE calculator?
TDEE calculators give an estimate, typically within a reasonable range for most healthy adults using formulas like Mifflin-St Jeor, but individual metabolism varies. The Mifflin-St Jeor equation is widely cited as one of the more accurate common estimation methods, though actual burn can still differ by a few hundred calories.
Final thought
For a quick, honest calorie-burn estimate, pick the calculator that shows its formula and gets out of the way — treat the number as a starting point to adjust from, not a fixed target.