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.

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.

Does muscle mass affect BMR?

Yes — muscle tissue burns approximately 3 times more calories at rest than fat tissue. Building muscle through resistance training 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. 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 include eating adequate protein, getting sufficient sleep, managing stress, and avoiding prolonged very low calorie diets.

Should I eat at my BMR to lose weight?

No — eating exactly at your BMR is too aggressive and risks muscle loss, fatigue, and nutrient deficiencies. Your fat loss calorie target should be below your TDEE but above your BMR.

How does BMR differ from RMR?

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. The practical difference for calorie planning is minimal.

Body Fat Percentage Calculator — What is Your Body Fat?

Body Fat Percentage Calculator

Estimate your body fat percentage and find out what it means for your goals.

Gender

Age

📏 Uses your height and weight to estimate body fat. Less precise than the Navy method but requires no measurements.

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Height (cm)

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Body Fat

What is Body Fat Percentage?

Your body fat percentage is the proportion of your total body weight that comes from fat tissue. Unlike BMI, which only uses height and weight, body fat percentage distinguishes between fat mass and lean mass — making it a far more accurate indicator of your true body composition.

Two people can have the same BMI but very different body fat percentages. A muscular athlete and a sedentary person of the same height and weight will look completely different — and their health risks will differ significantly. Body fat percentage captures what BMI cannot.

Body fat is divided into two types:

Essential fat: The minimum amount needed for basic physiological functions — hormone production, organ protection, and nervous system health. For men this is 3–5%, for women 10–13%
Storage fat: Fat accumulated beyond essential levels, stored in adipose tissue. Some storage fat is normal and healthy — excess storage fat is associated with metabolic disease

Body Fat Categories by Goal

Fat Loss

If your body fat is in the Average or Obese range, reducing it through a sustained calorie deficit and resistance training is the most effective approach. Use our Calorie Deficit Calculator to find your daily target. Aim to lose 0.5–1% of body weight per week to minimize muscle loss during your cut.

Obese (men 25%+, women 32%+): Fat loss is the top priority — start with a moderate deficit and daily movement
Average (men 18–24%, women 25–31%): A consistent deficit with resistance training will move you toward the fit range within 3–6 months
Fit (men 14–17%, women 21–24%): You are already in a healthy range — a small deficit can improve definition without sacrificing performance

Maintenance

If your body fat is in the Athletic or Fit range, maintenance is a valid goal. Eat at your TDEE, train consistently, and monitor your body fat every 4–6 weeks. Use our TDEE Calculator to find your maintenance calories.

Muscle Gain

The Athletic range (men 6–13%, women 14–20%) is the ideal starting point for a muscle-building phase. A slight calorie surplus of 200–300 kcal above your TDEE combined with progressive resistance training will add lean mass while keeping body fat in check. Use our Macro Calculator to set your targets.

How to Measure Body Fat Percentage

There are several methods for measuring body fat, ranging from simple estimates to highly precise clinical tools:

US Navy Method (used above): Uses neck, waist, and hip measurements to estimate body fat. Accurate within 3–4% for most people and requires only a tape measure
Skinfold calipers: A trained professional pinches skin at multiple sites to measure subcutaneous fat. Accurate within 3–5% when done correctly
DEXA scan: The gold standard — an X-ray scan that measures fat, muscle, and bone with high precision. Accurate within 1–2% but requires a clinic visit
Bioelectrical impedance (BIA): Smart scales and handheld devices that send a small electrical current through the body. Convenient but highly variable — results can swing by 3–5% based on hydration
BMI-based estimate (used above): Uses height, weight, age, and gender to estimate body fat. The least accurate method but requires no measurements

For tracking progress, consistency matters more than absolute accuracy. Use the same method under the same conditions every time.

Related Calculators

TDEE Calculator — Find your total daily calorie needs
BMR Calculator — Calculate your basal metabolic rate
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 Percentage Calculator FAQ

What is a healthy body fat percentage?

For men, a healthy body fat percentage is generally 14–24%. For women, it is 21–31%. Athletic individuals often fall below these ranges. Body fat above 25% for men and 32% for women is associated with increased health risks including insulin resistance and cardiovascular disease.

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 or skinfold calipers performed by a trained professional. For tracking progress over time, it is reliable and consistent.

How often should I measure my body fat?

Every 4–6 weeks is sufficient for most people. Body fat changes slowly — weekly measurements often show noise rather than real trends. 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. Results are slower than a dedicated cut or bulk but body composition improves simultaneously.

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. This is normal and healthy. Women require approximately 10–13% essential fat compared to 3–5% for men, which is why healthy ranges are higher across all categories for women.

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. Cardio accelerates the deficit but resistance training preserves muscle — losing muscle raises your body fat percentage even if the scale drops. Use our Calorie Deficit Calculator to find your target and our Protein Calculator to set your protein goal.