Macro & TDEE Calculator
Stop guessing how many calories you need. This free Macro & TDEE Calculator gives you your total daily energy expenditure, your BMR, and a complete protein, carbs, and fats breakdown – all personalized to your body, activity level, and goal.
Quick Definition: A TDEE calculator estimates the total number of calories your body burns every day – including rest, movement, exercise, and digestion. It combines your Basal Metabolic Rate (BMR) with an activity multiplier to give you a precise daily calorie target for weight loss, maintenance, or muscle gain.
Understanding Your Total Daily Energy Expenditure
Most people trying to lose weight or build muscle focus on what they eat. But without knowing how many calories your body burns every day, even the best diet plan falls short.
Your total daily energy expenditure (TDEE) is the total number of calories your body uses in a 24-hour period. It accounts for everything – your resting metabolism, daily activities, formal exercise, and even the energy your body uses to digest food.
Think about two people with the same weight and height. One works a desk job and barely moves. The other teaches fitness classes five days a week. Their calorie needs are completely different – and a generic “eat 2,000 calories” rule fails both of them.
That is exactly the problem this TDEE calculator solves. It uses your real inputs to give you a number that fits your body and your lifestyle – not a population average.
The Math Behind It – How TDEE Is Calculated
Your TDEE is not one single number your body produces. It is the sum of four components working together.
1. Basal Metabolic Rate (BMR) – 60-70% of TDEE This is the number of calories your body burns at complete rest – just to keep your heart beating, lungs breathing, and cells functioning. Your age, gender, height, and body weight all affect your BMR. This calculator gives you the choice of three proven equations to calculate BMR:
- Mifflin-St Jeor Equation (Recommended): The most accurate formula for the general population. It uses weight, height, age, and gender.
- Men: BMR = (10 x kg) + (6.25 x cm) – (5 x age) + 5
- Women: BMR = (10 x kg) + (6.25 x cm) – (5 x age) – 161
- Harris-Benedict Equation: An older, well-established formula. It is still widely used but tends to slightly overestimate BMR in some individuals.
- Katch-McArdle Formula: Best for lean individuals and athletes who know their body fat percentage. It uses lean body mass instead of total body weight, making it highly accurate if you have that data.
The American Journal of Clinical Nutrition recognizes the Mifflin-St Jeor equation as the most reliable standard for estimating resting metabolic rate in healthy adults.
2. Exercise Activity Thermogenesis (EAT) – 5-10% of TDEE These are the calories burned through intentional, deliberate exercise – gym sessions, running, cycling, and sports. This component is fully within your control.
3. Non-Exercise Activity Thermogenesis (NEAT) – 15-30% of TDEE NEAT covers all the movement that is not formal exercise – walking to your car, taking the stairs, fidgeting, doing chores. This component varies widely between people and can change your daily calorie burn by 2,000+ calories depending on your lifestyle.
4. Thermic Effect of Food (TEF) – ~10% of TDEE Your body burns energy just to digest and process food. Protein has the highest thermic effect (20-30% of its calories). Carbohydrates sit at 5-10%, and dietary fat has the lowest TEF at 0-3%. This is why a diet higher in protein naturally supports fat loss – the energy to digest it is built in.
The Full Equation: TDEE = BMR x Activity Multiplier
| Activity Level | Multiplier | Who It Fits |
|---|---|---|
| Sedentary | 1.2 | Desk job, little to no exercise |
| Lightly Active | 1.375 | Light exercise 1-3 days per week |
| Moderately Active | 1.55 | Exercise 3-5 days per week |
| Very Active | 1.725 | Heavy exercise 6-7 days per week |
| Extremely Active | 1.9 | Physical job plus daily exercise |
Interpreting Your Results – What Do the Numbers Mean?
Once you calculate your TDEE, the tool displays four outputs: your Daily Calorie Target, your BMR, and your personalized Protein, Carbs, and Fats in grams.
Here is how to read each one for your goal:
For Weight Loss (-500 cal/day) Your daily calorie target will be set 500 calories below your TDEE. This creates a moderate deficit that supports roughly 0.5 kg (1 lb) of fat loss per week. Your macro split will prioritize protein to protect muscle mass while you lose fat.
One important rule: never eat fewer calories than your BMR. Eating below your BMR slows your metabolism, causes muscle loss, and leads to nutrient deficiencies. Create your deficit from your TDEE – not your BMR.
For Maintenance Your calorie target matches your TDEE. This is the number of calories your body needs to maintain your current weight. A balanced macro ratio keeps energy levels stable and supports overall health.
For Muscle Gain (+500 cal/day) Your calorie target sits 500 calories above your TDEE. The macro ratio shifts to support muscle growth and strength – with higher carbohydrate intake to fuel training and sufficient protein for repair and growth.
Reading Your Macro Numbers: The three output boxes show your daily gram targets for Protein, Carbs, and Fats. These represent the major nutrients your body needs in large amounts. For example, if your goal is weight loss and your output shows 155g protein, 155g carbs, and 59g fat – your nutrition plan should aim to hit those numbers daily, not just focus on total calories alone.
Key Features of This TDEE Calculator
This tool goes further than a basic calorie estimate. Here is what makes it genuinely useful:
- Three formula options – Choose between the Mifflin-St Jeor equation, Harris-Benedict equation, or Katch-McArdle formula based on your situation
- Five activity levels – Sedentary, Lightly Active, Moderately Active, Very Active, and Extremely Active – so your activity multiplier reflects your real lifestyle
- Three goal settings – Weight Loss (-500 cal/day), Maintenance, and Muscle Gain (+500 cal/day) to personalize your calorie and macro targets
- Full macro breakdown – Protein, carbs, and fats displayed in grams, not just percentages
- BMR and TDEE displayed separately – So you can see your resting energy expenditure alongside your total energy expenditure
- Metric and imperial support – Enter height in ft/in or cm, and weight in kg or lbs
- Print and share options – Save or email your results directly from the tool
- 100% free, instant results – No login, no sign-up, no data stored on any server
How to Use the Macro & TDEE Calculator – Step-by-Step
The tool takes less than 60 seconds to complete. Follow these steps exactly:
Step 1: Select Your Gender Use the Gender dropdown and choose Male or Female. Gender affects the BMR equation directly – the Mifflin-St Jeor formula uses different constants for men and women.
Step 2: Enter Your Age Type your age in years into the Age (years) field. Your BMR decreases by roughly 2% per decade after age 20, so this input meaningfully changes your results.
Step 3: Enter Your Height Type your height into the two Height fields. Use the dropdown on the right to select ft & in or cm. For example, 6 ft 0 in entered as “6” in the first box and “0” in the second.
Step 4: Enter Your Weight Type your body weight into the Weight field. Use the dropdown to select kg or lbs. Be honest here – your weight is the single biggest driver of your calorie burn.
Step 5: Choose Your Calculation Formula Use the Calculation Formula dropdown to pick one of three options:
- Mifflin-St Jeor (Recommended) – Best for most people
- Harris-Benedict – A reliable traditional approach
- Katch-McArdle – Only if you know your body fat percentage
When in doubt, stay with Mifflin-St Jeor.
Step 6: Set Your Activity Level This is the step most people get wrong. Pick from five options:
- Sedentary (Little to no exercise)
- Lightly Active (Exercise 1-3 days/wk)
- Moderately Active (Exercise 3-5 days/wk)
- Very Active (Heavy exercise 6-7 days/wk)
- Extremely Active (Physical job + exercise)
Pro tip: Most office workers who exercise 3-4 times a week are “Lightly Active” – not “Moderately Active.” Studies show 80% of people overestimate their activity level. When in doubt, choose the lower option. You can always adjust upward based on real results.
Step 7: Select Your Goal Use the Your Goal dropdown to choose:
- Weight Loss (-500 cal/day)
- Maintenance (Maintain weight)
- Muscle Gain (+500 cal/day)
Step 8: Click “Calculate Macros & TDEE” Hit the large blue Calculate Macros & TDEE button. Your results appear instantly below, showing your Daily Calorie Target, Protein (g), Carbs (g), Fats (g), your BMR, and your full TDEE.
Step 9: Save or Share Your Plan Use the Print Plan button to save a copy, or click Email / Share to send your results to yourself or a coach.
Quick Reference Table – TDEE by Goal
| Goal | Daily Calories | Macro Focus | Expected Rate |
|---|---|---|---|
| Weight Loss | TDEE – 500 | High protein, moderate carbs | ~0.5 kg/week |
| Maintenance | Equal to TDEE | Balanced across all three macros | Stable weight |
| Muscle Gain | TDEE + 500 | Higher carbs, high protein | ~0.25-0.5 kg/week |
| Aggressive Cut | TDEE – 750 | Very high protein to protect muscle | ~0.75 kg/week |
| Lean Bulk | TDEE + 200-300 | Moderate surplus, high protein | Minimal fat gain |
| Keto Adaptation | Equal to TDEE | High fat, very low carbs | Varies by individual |
Accuracy & Trust Guarantee
This calculator uses the same scientifically validated equations used by registered dietitians and sports nutrition professionals worldwide.
- Formula accuracy: The Mifflin-St Jeor equation carries an accuracy range of approximately plus or minus 10% for most healthy adults – the best available estimate short of laboratory metabolic testing
- No data stored: Your inputs are never saved, transmitted, or stored on any server. All calculations happen locally in your browser
- Three formula options: Unlike basic single-formula tools, this calculator lets you match the equation to your body composition
- Regularly updated: The formulas and activity multipliers reflect current exercise science standards
- Free, always: No subscription, no paywall, no hidden upsells
For personalized medical nutrition advice, always consult a registered dietitian or healthcare provider. This tool provides an estimate – individual needs vary based on health conditions, medications, hormones, and body composition.
Want to go deeper on your health metrics? Also try our THC mg to Percentage Calculator for precise supplement dosing.
Frequently Asked Questions (FAQs)
What is the difference between BMR and TDEE?
Your BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest – just to sustain basic survival functions. Your TDEE is your BMR multiplied by an activity factor, representing the total calories you burn every day including movement, exercise, and digestion. Always base your diet on your TDEE, never your BMR.
Which TDEE formula should I use?
The Mifflin-St Jeor equation is the most accurate option for most people and the recommended default. Use Harris-Benedict if you prefer the traditional approach. Choose Katch-McArdle only if you know your body fat percentage – it uses lean body mass instead of total weight, making it the most precise formula for lean individuals and athletes.
How often should I recalculate my TDEE?
Recalculate your TDEE every 4-6 weeks, or every time you lose or gain 5 kg (10-12 lbs). Your total daily energy expenditure changes as your body weight, muscle mass, and activity level shift. Using an outdated number leads to stalled progress.
Why am I not losing weight even when eating below my TDEE?
Two common reasons: overestimating your activity level (try dropping one level down) and underestimating calorie intake – studies show most people undercount food intake by 20-40%. Track everything using a food scale for two weeks and recalculate. Also check our Army Body Fat Calculator to assess whether your body composition has changed in ways that affect your TDEE.