Skip to content

Free Macro & TDEE Calculator

Estimate daily calories, protein, carbs, fat, and selected micronutrient reference values for general adult meal planning.

Formula-based estimates · No signup required

ft
in

Turn your estimates into flexible meal ideas

MealThinker can use your saved planning values as flexible guidance, not exact medical targets.

Turn Numbers Into Meals

Understanding Your Numbers

These formulas can provide rough planning estimates. Understanding what they do and do not measure helps you use the numbers cautiously.

What is TDEE?

TDEE stands for Total Daily Energy Expenditure. This calculator estimates it by combining an equation-based basal metabolic rate with a broad activity multiplier. It is a planning estimate, not a measurement of your metabolism or a prescribed intake.

What are macros?

Macronutrients (macros) are the three main nutrients your body needs in large amounts: protein, carbohydrates, and fat. Each plays a different role. Protein builds and repairs muscle. Carbs fuel your brain and workouts. Fat supports hormones and absorbs vitamins. Balancing these based on your goals matters more than just counting total calories.

What are micronutrients?

Micronutrients are vitamins and minerals your body needs in smaller amounts but are still essential for health. This calculator shows six key micronutrients: fiber for digestive health, iron for oxygen transport, calcium for bones, sodium as an upper limit, vitamin C for immunity, and vitamin B12 for energy and nerve function.

How to use your results

Treat these values as rough starting estimates for general meal planning, not numbers you must hit exactly. Individual needs vary. If you have a medical condition, take medication, are pregnant or breastfeeding, are under 18, or have an eating-disorder history, use guidance from a qualified clinician or registered dietitian instead.

Need dinner ideas that fit your macros? Try our free What Should I Eat Tonight? tool for instant meal suggestions with calorie and macro breakdowns.

Frequently Asked Questions

How accurate is this TDEE calculator?
The calculator uses the Mifflin-St Jeor equation and a broad activity multiplier to produce a starting estimate. It cannot measure your metabolism, activity, health status, or individual needs, so the result can differ from your actual energy use.
How much protein do I need per day?
The displayed protein value comes from a formula using the weight and goal you entered. It is a general planning estimate, not an individualized prescription. A qualified clinician or registered dietitian can help if performance, kidney health, pregnancy, recovery, or another medical concern affects your needs.
Should I eat my TDEE or my goal-adjusted calories?
Treat both numbers as estimates, not instructions. The goal-adjusted value applies the calculator's fixed formula to estimated TDEE, but it may not be appropriate for you. Avoid aggressive restriction and seek qualified guidance if the estimate seems unusually low or if health conditions, medications, pregnancy, breastfeeding, age, or eating-disorder history may affect your needs.
Why are my micronutrient targets different based on sex?
Some public dietary reference values vary by age and sex category, but an individual person's needs can also be affected by pregnancy, breastfeeding, health conditions, medications, absorption, and other factors. The calculator cannot assess those factors.
Why does the calculator show higher iron for vegans and vegetarians?
Plant-based iron is generally absorbed less efficiently than heme iron, so public reference guidance may use a higher planning value for vegetarian patterns. This calculator's adjustment is still only a general estimate and should not be used to diagnose deficiency or choose a supplement dose.
What's the difference between BMR and TDEE?
BMR is an equation-based estimate of energy used for basic body functions at rest. TDEE applies a broad activity multiplier to that estimate. Neither value directly measures your metabolism or daily energy use.
How often should I recalculate my macros?
Recalculate when the inputs you provided change materially, but do not treat short-term weight changes as proof that the estimate is right or wrong. A qualified professional can help interpret longer-term trends and health context.
Can I use this calculator if I'm pregnant or breastfeeding?
No. This general adult calculator does not account for pregnancy or breastfeeding needs. Use individualized guidance from your prenatal healthcare team or a qualified registered dietitian.

Stop guessing. Start eating right.

Start Your Free Meal Plan — only if eligible.

7-day free trial if eligible · Payment method required · Cancel before renewal