How do I lose weight using my TDEE?

To lose weight, eat less than your TDEE. A deficit of 300–500 calories per day leads to steady fat loss of 0.5–1 lb per week. Track your intake for 2–3 weeks and adjust based on results.

Is TDEE the same as BMR?

No. BMR is the number of calories your body burns at complete rest. TDEE includes BMR plus all additional calories burned through daily activity, exercise, and digesting food.

How accurate is a TDEE calculator?

TDEE calculators are estimates based on population averages. Most people find them accurate within 100–200 calories. Use the result as a starting point and adjust based on real-world results over 2–3 weeks.

Why am I not losing weight if I'm eating at a deficit?

The most common reasons are underestimating calorie intake, overestimating activity level, or water retention masking fat loss. Track food accurately for 2 weeks before adjusting your deficit.

Should I eat back calories burned during exercise?

It depends on how you calculated your TDEE. If you used an activity multiplier that includes your workouts, do not eat them back. If you used a sedentary multiplier and add exercise separately, eating back 50–75% of burned calories is reasonable.

How often should I recalculate my TDEE?

Recalculate every 4–6 weeks or whenever your weight changes by more than 5 lbs, your activity level changes significantly, or your results plateau for more than 3 weeks.

How much protein do I need per day?

Most research supports 0.7–1g of protein per pound of bodyweight per day for active individuals. For fat loss, staying toward the higher end helps preserve muscle. For muscle gain, 0.8–1g per pound is ideal.

Does protein timing matter?

Total daily protein intake matters far more than timing. That said, spreading protein across 3–4 meals and consuming 20–40g within a few hours of training can help maximize muscle protein synthesis.

Can I get enough protein without eating meat?

Yes. Plant-based sources like tofu, tempeh, edamame, lentils, chickpeas, and seitan are high in protein. Combining complementary protein sources throughout the day ensures you get all essential amino acids.

Is too much protein bad for you?

For healthy individuals, high protein intakes up to 1.5g per pound of bodyweight are generally safe. The concern about kidney damage from protein applies only to people with pre-existing kidney conditions.

What protein sources are best for muscle gain?

Animal sources like chicken, beef, eggs, fish, and dairy are complete proteins with high bioavailability. Whey protein is particularly effective post-workout. For plant-based options, soy protein and pea protein are the closest equivalents.

Should I change my protein intake when cutting?

Yes — increase it. When in a calorie deficit, higher protein intake (0.8–1.2g per pound) helps preserve lean muscle mass. This is one of the most evidence-backed strategies for improving body composition while losing fat.

What is a macro split?

A macro split is the percentage of your daily calories that come from protein, carbohydrates, and fat. A common split for fat loss is 40% protein, 30% carbs, 30% fat. For muscle gain, a 30% protein, 45% carbs, 25% fat split is often used.

Do I need to track macros to lose weight?

No — total calorie intake drives weight loss, not macro ratios. However, tracking macros gives you more control over body composition, energy levels, and hunger. It is especially useful if you want to lose fat while preserving muscle.

How many carbs should I eat per day?

Carb needs vary based on activity level and goals. After setting protein and fat targets, carbs fill the remaining calories. Active individuals and those focused on muscle gain benefit from higher carb intakes, while lower carb approaches can work for fat loss.

Should I go low fat or low carb for fat loss?

Research shows both approaches produce similar fat loss results when calories and protein are equated. Choose the approach that best fits your food preferences and lifestyle — the one you can sustain is the one that works.

How do I adjust my macros if I hit a plateau?

First verify your tracking accuracy. If intake is accurate, reduce calories by 100–150 per day by lowering carbs or fat slightly. Avoid dropping protein. Alternatively, increase daily activity with walking or NEAT before cutting more calories.

Can I build muscle and lose fat at the same time?

Yes — this is called body recomposition. It works best for beginners, those returning after a break, and people with higher body fat percentages. It requires eating near maintenance calories with high protein and consistent resistance training.

What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered healthy for most adults. However, healthy BMI ranges can vary slightly by age and ethnicity. Asian populations may have health risks at lower BMI thresholds than the standard classification suggests.

Is BMI accurate for muscular people?

No — BMI is not accurate for highly muscular individuals. Since muscle is denser than fat, athletes and bodybuilders often show a high BMI despite having low body fat. In these cases, body fat percentage is a more reliable measure.

Can I have a normal BMI but still have too much body fat?

Yes. This is called normal weight obesity and occurs when someone has a healthy BMI but a high percentage of body fat due to low muscle mass. This is why BMI should always be considered alongside other measures like waist circumference and body composition.

How often should I calculate my BMI?

Once every 4–8 weeks is sufficient for most people. BMI changes slowly and daily fluctuations in water weight can give misleading readings. Track trends over months rather than obsessing over weekly numbers.

Does BMI differ for men and women?

The BMI formula is the same for men and women, but body fat distribution differs between sexes. Women naturally carry more body fat than men at the same BMI. Some health professionals use gender-specific adjustments when interpreting BMI results.

What should I do if my BMI is in the Obese range?

Start with sustainable changes — a modest calorie deficit, daily walking, and resistance training 2–3 times per week. Even a 5–10% reduction in body weight produces significant health benefits. Use a TDEE calculator to find your calorie target and a protein calculator to protect muscle while losing fat.

How do I calculate my calorie deficit?

Subtract your target daily calories from your TDEE. For example, if your TDEE is 2,500 kcal and you eat 2,000 kcal, your deficit is 500 kcal/day. Over 7 days that is a 3,500 kcal weekly deficit — enough to lose approximately 0.45 kg per week.

Is a 500 calorie deficit safe?

Yes — a 500 kcal/day deficit is widely considered safe and sustainable for most healthy adults. It produces roughly 0.5 kg of fat loss per week without significantly impacting energy levels or muscle mass, especially when paired with adequate protein intake.

What happens if my deficit is too large?

Deficits above 1,000 kcal/day increase the risk of muscle loss, nutrient deficiencies, fatigue, and metabolic adaptation. Staying in a moderate deficit is more effective over time.

Should I eat back calories burned during exercise?

It depends on how your TDEE was calculated. If your activity level already accounts for your workouts, do not eat them back. If you selected a sedentary multiplier and exercise on top of that, eating back 50–75% of burned calories is a reasonable approach.

Why am I not losing weight in a calorie deficit?

The most common reasons are underestimating calorie intake, overestimating portions, or not accounting for liquid calories and cooking oils. Water retention from high sodium, stress, or new training can also mask fat loss on the scale for 1–2 weeks.

How much protein should I eat in a calorie deficit?

Aim for 1.6–2.2g of protein per kg of bodyweight while cutting. Higher protein intake preserves muscle mass, keeps you fuller for longer, and has a higher thermic effect.

What is a healthy body fat percentage?

For men, a healthy body fat percentage is generally 14–24%. For women, it is 21–31%. Body fat above 25% for men and 32% for women is associated with increased health risks.

How accurate is the Navy method?

The US Navy method is accurate within 3–4% for most people when measurements are taken correctly. It is more accurate than BMI-based estimates but less precise than DEXA scans.

How often should I measure my body fat?

Every 4–6 weeks is sufficient for most people. Always measure under the same conditions: same time of day, same hydration level, and same method.

Can I lose fat and gain muscle at the same time?

Yes — this is called body recomposition. It is most effective for beginners, people returning after a break, and those with higher body fat percentages. It requires eating near maintenance calories with high protein intake and consistent progressive resistance training.

Why do men and women have different healthy body fat ranges?

Women naturally carry more essential fat than men due to hormonal differences and the physiological demands of reproduction. Women require approximately 10–13% essential fat compared to 3–5% for men.

What is the fastest way to lower body fat percentage?

A combination of a moderate calorie deficit, high protein intake, and resistance training produces the fastest sustainable results. Resistance training preserves muscle — losing muscle raises your body fat percentage even if the scale drops.

BMR Calculator — Find Your Basal Metabolic Rate

BMR Calculator

Calculate your Basal Metabolic Rate — the number of calories your body burns at complete rest.

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Your BMR

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Per Hour

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Per Week

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Per Month

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Formula Comparison

Your TDEE by Activity Level

What this means for your goals

What is BMR?

Your Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest — just to keep you alive. This includes breathing, circulation, cell repair, hormone production, and organ function. Even if you stayed in bed all day without moving, your body would still burn your BMR in calories.

BMR is the foundation of all calorie calculations. Every other number — your maintenance calories, your fat loss target, your muscle gain surplus — is built on top of it. Understanding your BMR gives you the baseline you need to manage your weight with precision.

BMR is influenced by four main factors:

Body weight: Heavier people burn more calories at rest because there is more tissue to maintain
Height: Taller people generally have a higher BMR due to greater body surface area
Age: BMR decreases by roughly 1–2% per decade after age 20 as muscle mass naturally declines
Gender: Men typically have a higher BMR than women of the same size due to greater muscle mass and lower body fat percentage

BMR vs TDEE — What’s the Difference?

BMR and TDEE are related but different numbers:

BMR is your calorie burn at complete rest — zero activity, zero movement
TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor — it accounts for everything you do during the day including walking, working out, and even digesting food

For most people, TDEE is 20–90% higher than BMR depending on activity level. A sedentary person might have a TDEE of 1.2x their BMR, while a very active person could be at 1.9x. Use our TDEE Calculator to find your exact number.

BMR is your floor. TDEE is your target. Never eat below your BMR for extended periods — doing so forces your body to break down muscle tissue for energy, which lowers your metabolism over time.

How to Use Your BMR

Fat Loss

Your BMR sets the absolute minimum calories you should ever eat. Your fat loss target should be below your TDEE but always above your BMR. A practical fat loss calorie target is TDEE minus 300–500 kcal/day. Use our Calorie Deficit Calculator to find your exact target and timeline.

Never eat below BMR: Doing so causes muscle loss, metabolic adaptation, and nutrient deficiencies
Aim for TDEE minus 300–500 kcal: This produces 0.25–0.5 kg of fat loss per week sustainably
Keep protein high: 1.6–2.2g per kg of bodyweight protects muscle during a deficit

Maintenance

Eating at your TDEE keeps your weight stable. Your BMR tells you how much of that energy is non-negotiable — the calories your body will consume regardless of what you do. Track your weight weekly to confirm your maintenance calories are accurate.

Muscle Gain

To build muscle you need to eat above your TDEE — typically 200–300 kcal above maintenance for a lean bulk. Your BMR remains the same but your TDEE increases as you gain muscle, since muscle tissue burns more calories at rest than fat tissue.

Which BMR Formula is Most Accurate?

This calculator uses two formulas and shows both results:

Mifflin-St Jeor (recommended): Developed in 1990, this is the most accurate formula for most people according to current research. It is the default used by most registered dietitians and is the primary result shown above
Harris-Benedict (revised): The original BMR formula from 1919, revised in 1984. Slightly less accurate than Mifflin-St Jeor for modern populations but still widely used

Both formulas are estimates based on population averages. Individual results can vary by 5–10% depending on genetics, muscle mass, and metabolic health. Use your BMR as a starting point and adjust based on real-world results over 2–3 weeks.

Related Calculators

TDEE Calculator — Find your total daily calorie needs
Protein Calculator — Find your ideal daily protein intake
Macro Calculator — Break your calories into protein, carbs, and fat
BMI Calculator — Calculate your Body Mass Index
Calorie Deficit Calculator — Set your fat loss calorie target
Body Fat % Calculator — Estimate your body fat percentage

BMR Calculator FAQ

What is a good BMR?

There is no universal “good” BMR — it varies based on your size, age, and gender. A typical BMR for an adult male is 1,600–2,000 kcal/day and for an adult female is 1,300–1,600 kcal/day. What matters more than the absolute number is how you use it to set your calorie targets.

Does muscle mass affect BMR?

Yes — muscle tissue burns approximately 3 times more calories at rest than fat tissue. This is why resistance training is one of the most effective long-term strategies for increasing your BMR. Building muscle raises your metabolic floor, making it easier to maintain a healthy weight over time.

Why does BMR decrease with age?

BMR decreases with age primarily because of sarcopenia — the natural loss of muscle mass that begins around age 30. Since muscle burns more calories at rest than fat, losing muscle reduces your BMR. Regular resistance training significantly slows this decline and can even reverse it.

Can I increase my BMR?

Yes — the most effective way to increase your BMR is to build muscle through resistance training. Other factors that support a healthy metabolism include eating adequate protein, getting sufficient sleep, managing stress, and avoiding prolonged very low calorie diets which can cause metabolic adaptation.

Should I eat at my BMR to lose weight?

No — eating exactly at your BMR is too aggressive for most people and risks muscle loss, fatigue, and nutrient deficiencies. Your fat loss calorie target should be below your TDEE but above your BMR. Use our Calorie Deficit Calculator to find a sustainable target that creates a deficit without dropping below your metabolic floor.

How does BMR differ from RMR?

BMR (Basal Metabolic Rate) and RMR (Resting Metabolic Rate) are very similar but measured differently. BMR requires strict laboratory conditions — complete physical rest, a fasted state, and a thermoneutral environment. RMR is measured under less strict conditions and is typically 10–20% higher than BMR. Most calculators, including this one, estimate BMR but the practical difference for calorie planning is minimal.