What Is TDEE and How Do I Calculate My Macros?

You search "tdee calculator macros" because you want one number to aim at — how many calories, and how much protein, carbs, and fat — without guessing. The vocabulary gets in the way first: TDEE, BMR, macros, activity multipliers. Once those click, the math is straightforward.

This article explains what TDEE is, how it differs from BMR, what macros actually are, and walks through a full calculation you can verify by hand or skip straight to a calculator.

What TDEE means

TDEE stands for Total Daily Energy Expenditure — the total calories your body burns in a 24-hour period.

That includes everything: keeping your heart beating, digesting food, walking to the kitchen, a gym session, fidgeting at your desk. If you eat roughly your TDEE every day, your weight stays about the same. Eat below it consistently and you lose weight. Eat above it and you gain.

TDEE is the anchor number for any cut, bulk, or maintenance phase. Everything else — deficit size, macro split, meal timing — hangs off it.

BMR vs TDEE: not the same number

People mix these up constantly, and the confusion leads to eating the wrong amount.

BMR (Basal Metabolic Rate) is what you burn lying in bed, awake but completely still — the energy cost of staying alive. No walking, no workouts, no standing up to make coffee.

TDEE is BMR plus everything you do on top of resting.

Think of BMR as the engine idling. TDEE is the engine idling plus every mile you drive.

You cannot eat at BMR long-term unless you are bedridden. Most people need a number closer to TDEE — often 300 to 800 calories above BMR depending on activity.

How to calculate TDEE (step 1: BMR)

The most widely used everyday formula is Mifflin-St Jeor:

Men: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5

Women: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age − 161

You need metric units for the formula. If you think in pounds and feet, convert first — or use a calculator that accepts imperial inputs and converts behind the scenes.

How to calculate TDEE (step 2: activity factor)

Multiply BMR by an activity factor that matches your typical week:

| Activity level | Description | Multiplier | |---|---|---| | Sedentary | Desk job, little or no exercise | × 1.2 | | Lightly active | Light exercise 1–3 days/week | × 1.375 | | Moderately active | Moderate exercise 3–5 days/week | × 1.55 | | Very active | Hard exercise 6–7 days/week | × 1.725 | | Extra active | Physical job or training twice daily | × 1.9 |

TDEE = BMR × activity factor

Be honest here. "Moderately active" does not mean you went to the gym twice this month. Overestimating activity is the most common reason a TDEE number feels too high and weight loss stalls.

What macros are

Macros — short for macronutrients — are the three calorie-containing nutrients in food:

• Protein — 4 calories per gram. Builds and repairs muscle, supports satiety.
• Carbohydrates — 4 calories per gram. Primary fuel for training and daily energy.
• Fat — 9 calories per gram. Hormone production, nutrient absorption, long-lasting energy.

Every calorie you eat comes from one of these three. Alcohol is technically a fourth energy source, but macro planning focuses on protein, carbs, and fat.

Tracking macros instead of only calories lets you control what kind of weight you lose or gain — preserving muscle on a cut, for example, usually means keeping protein high even when total calories drop.

How to calculate macros from TDEE

Once you have TDEE, pick a calorie target:

• Maintain weight — eat at TDEE
• Lose weight — eat ~500 calories below TDEE (roughly 0.45 kg / 1 lb per week)
• Gain weight — eat ~500 calories above TDEE

Then split your target calories into protein, carbs, and fat using percentages. A balanced starting point many calculators default to:

• 30% protein
• 40% carbs
• 30% fat

Convert each percentage to grams:

• Protein grams = (calories × protein %) ÷ 4
• Carbs grams = (calories × carbs %) ÷ 4
• Fat grams = (calories × fat %) ÷ 9

Percentages must add to 100%. Adjust the split to taste — higher protein on a cut, more carbs around heavy training days — as long as the total stays consistent.

Worked example: 30-year-old man, moderately active

Inputs: Male, 30 years old, 80 kg, 180 cm, moderately active (× 1.55)

Step 1 — BMR:

10 × 80 + 6.25 × 180 − 5 × 30 + 5

= 800 + 1,125 − 150 + 5

= 1,780 kcal

Step 2 — TDEE:

1,780 × 1.55 = 2,759 kcal (rounded)

This is his maintenance number. Eat here and weight holds steady.

Step 3 — Goal calories:

| Goal | Calculation | Daily calories | |---|---|---| | Maintain | 2,759 | 2,759 | | Lose | 2,759 − 500 | 2,259 | | Gain | 2,759 + 500 | 3,259 |

Step 4 — Macros at maintenance (30 / 40 / 30 split):

| Macro | Calculation | Grams per day | |---|---|---| | Protein (30%) | (2,759 × 0.30) ÷ 4 | 207 g | | Carbs (40%) | (2,759 × 0.40) ÷ 4 | 276 g | | Fat (30%) | (2,759 × 0.30) ÷ 9 | 92 g |

For a cut at 2,259 calories with the same ratio: about 169 g protein, 226 g carbs, 75 g fat.

That is the full chain — BMR, TDEE, goal calories, macro grams — in one pass.

Common mistakes to avoid

Using BMR as your daily target. BMR is a resting number. Eating at BMR while living a normal active life creates an accidental large deficit and can feel unsustainable.

Overstating activity level. If your job is mostly sitting and you train three times a week, "moderately active" fits. "Very active" is for six or seven hard sessions weekly or a physical job on top of training.

Ignoring the scale for two to three weeks. TDEE is an estimate. If you eat at a calculated deficit and weight does not move, your real TDEE may be lower than the formula predicted — drop another 100–150 calories and reassess.

Forgetting that fat has more than double the calories per gram. Swapping carbs for fat without adjusting portions adds calories fast. The 9 cal/g vs 4 cal/g difference matters when you move macro sliders.

When a browser calculator beats a spreadsheet

The manual math is not hard for one scenario. It gets tedious when you want to compare maintain, lose, and gain side by side, switch between metric and imperial, or nudge protein from 30% to 35% without redoing every step.

A browser-based TDEE and macro calculator handles the Mifflin-St Jeor equation, activity multipliers, and gram conversions instantly. If it runs entirely client-side, your weight and height never leave your device — no account, no cloud sync, no subscription.

When you are ready to run your own numbers, use our free Calorie & Macro Calculator (TDEE) — enter your stats, pick an activity level, and get BMR, TDEE, and maintain/lose/gain targets each with a protein, carbs, and fat breakdown in grams. Adjust the macro sliders to match your preference and copy the targets into whatever app you track with.

What to do after you have your numbers

Write down your calorie target and protein gram minimum. Hit protein first at each meal, fill carbs and fat around it, and weigh yourself at the same time of day a few times per week.

If the scale trend matches your goal after two to three weeks, keep going. If not, adjust calories by 100–150 in the right direction and repeat. The calculator gives you the starting line — your body gives you the feedback loop.