Biometric Interface
Enter your details below for your personalized health performance report
Your Personalized Health Report
Based on Mifflin-St Jeor equation — the gold standard for TDEE & calorie calculation
Shop exactly what your macros demand.
Your calorie target is calculated. Now the hard part: finding the right foods at the right cost. GrocerFi converts your macronutrient targets into a precise, budget-optimized weekly grocery list — so every rupee you spend is a rupee that moves you closer to your goal.
What Is TDEE and Why Does It Matter?
Your Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns every day, accounting for your basal metabolic rate (BMR) and your physical activity level. It is the single most important number in any nutrition or fitness plan.
If your goal is fat loss, you need to eat below your TDEE (a calorie deficit). For muscle gain, you eat above it (a calorie surplus). For weight maintenance, you eat exactly at your TDEE. This calculator uses the scientifically validated Mifflin-St Jeor equation, widely recommended by dietitians and sports scientists as the most accurate method for estimating BMR in healthy adults.
BMR — Basal Metabolic Rate
The calories your body burns at complete rest — just to keep you alive. Accounts for 60–75% of your total daily calorie burn.
TDEE — Total Daily Energy
Your BMR multiplied by your activity level. This is your true daily calorie burn and the foundation of every diet plan.
BMI — Body Mass Index
A simple ratio of weight to height-squared. Useful as a screening tool, though it doesn't account for muscle mass or body composition.
Macronutrients
Protein, carbohydrates, and fats — the three energy sources. Getting the right macro split is key to body recomposition and performance.
Frequently Asked Questions
How accurate is this calorie calculator?
This tool uses the Mifflin-St Jeor equation, the most accurate TDEE formula available for the general population, with a typical margin of error of ±10%. For best results, measure your weight and height accurately and be honest about your activity level.
How much protein do I actually need per day?
For active individuals, research consistently supports 1.6–2.2g of protein per kilogram of body weight for muscle retention and growth. If you're in a calorie deficit, aim for the higher end (2.0–2.4g/kg) to protect your lean muscle mass.
What is a healthy BMI range?
The World Health Organization classifies a BMI of 18.5–24.9 as the healthy weight range. BMI below 18.5 is underweight; 25–29.9 is overweight; 30+ is classified as obese. Note that BMI is a screening tool, not a diagnostic measure — athletes often have high BMIs due to muscle mass.
How many calories should I eat to lose weight?
A safe, sustainable calorie deficit is 300–500 calories below your TDEE. This creates a fat loss rate of approximately 0.3–0.5kg per week without sacrificing muscle. This calculator automatically applies a 400-calorie deficit for fat loss goals.
Does sleep affect weight loss?
Yes, significantly. Research shows that getting fewer than 7 hours of sleep consistently raises cortisol (the stress hormone), reduces insulin sensitivity, and increases hunger hormones — all of which make fat loss much harder. Aim for 7–9 hours per night.
FitHealth Pro — The Calculator That Finally Connects Your Body, Your Food, and Your Money
My friend Arjun spent three years trying to lose weight. He tried keto, intermittent fasting, a gym membership he used for six weeks, two different diet apps, and a nutritionist consultation that cost ₹4,500 for a generic meal plan he abandoned in 10 days. None of it stuck. Then last year, completely by accident, he sat down for 10 minutes with a TDEE calculator. For the first time in his life, he saw a single, specific number: 2,140 calories per day. Not a range. Not advice. A number. He ate at 1,740 (a 400-calorie deficit), hit 140g of protein daily, and lost 14kg in 7 months without any special diet, gym, or coach. The information was free. He'd just never had it before.
FitHealth Pro gives you that number — plus BMI, BMR, TDEE, your daily protein and macro targets, body fat percentage estimate, hydration goal, sleep analysis, and a complete monthly fitness budget breakdown. Everything your body needs to understand itself, in one place, in under two minutes.
What Are BMI, BMR, TDEE — And Why Do All Three Matter Together?
Most people have heard of BMI but don't know BMR or TDEE — and that's precisely why most diets fail. BMI tells you roughly where you stand. BMR tells you what your body actually burns at rest. TDEE tells you what it burns with your real lifestyle. You need all three to make any intelligent nutrition decision.
Body Mass Index = Weight (kg) ÷ Height² (m). A screening number — useful, but limited. Doesn't distinguish muscle from fat. Use it as a starting reference, not a final verdict on your health.
Basal Metabolic Rate — calories burned at complete rest just to stay alive. Heart beating, lungs breathing, organs functioning. Accounts for 60–75% of total daily calorie burn. The foundation of all calorie planning.
Total Daily Energy Expenditure = BMR × Activity Multiplier. The actual calories your body burns with your real daily activity. The single most important number in any fitness or nutrition plan.
How to Use FitHealth Pro — What Every Input Actually Means
Seven inputs, two minutes, a complete health picture. Here's exactly what to enter and why it matters:
These are the core inputs to the Mifflin-St Jeor equation — the most validated BMR formula for healthy adults. Use your morning weight (after using the bathroom, before eating) for the most accurate reading. Height should be without shoes. Biological sex matters because male and female bodies have different hormonal compositions affecting metabolic rate at identical weights.
Enter your waist measurement at the narrowest point (typically just above the belly button) to unlock the body fat percentage estimate and waist-to-height ratio. The WHR is a stronger predictor of cardiovascular risk than BMI — a WHR above 0.5 signals elevated metabolic risk. A tape measure and 10 seconds is all it takes.
This is the input most people get wrong — they overestimate their activity. "Sedentary" means a desk job with no formal exercise (activity multiplier 1.2). "Lightly Active" means 1–2 gym visits per week (1.375). "Moderately Active" means 3–5 sessions (1.55). "Very Active" means daily intense training (1.725). Athletes training twice daily use 1.9. If you walk to work and do yoga twice a week, you're Lightly Active — not Moderately. Getting this right can shift your TDEE by 200–400 calories.
The calculator automatically applies evidence-based calorie adjustments: Fat Loss applies a 400 kcal/day deficit (targeting ~0.4kg fat loss/week — sustainable without muscle loss). Muscle Gain applies a 250 kcal surplus (lean bulk — minimises fat gain). Maintenance targets exact TDEE. These adjustments are built into the calorie target shown in the results banner.
Choose Balanced (40C/30P/30F) for general health and beginners. High Protein (30C/40P/30F) for muscle building, body recomposition, or anyone wanting maximum satiety while dieting. Ketogenic (5C/30P/65F) for those following a low-carb protocol. The donut chart in results shows your exact gram targets for each macro based on your calorie target and split selection.
These unlock the sleep quality and hydration gap insights. The hydration target is calculated at 35ml per kg of body weight — the scientifically supported baseline for an active adult. The sleep insight flags if you're below 7 hours (which raises cortisol and impairs fat loss) or consistently above 9 hours (which may signal underlying issues).
Enter your daily food budget, monthly gym or fitness cost, and monthly healthcare buffer. The calculator shows your total monthly fitness spend, annual projection, and cost-per-1000-kcal efficiency — a unique metric that shows how much you're spending to fuel each 1,000 calories of your daily target. This bridges health and personal finance in a way most health tools ignore.
The Science Behind the Numbers — All 5 Formulas Explained
Female: BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) − 161
BMI = Weight (kg) ÷ Height² (m²). Healthy range: 18.5–24.9. Below 18.5 = underweight. 25–29.9 = overweight. 30+ = obese. Note: BMI doesn't account for muscle mass — athletes and bodybuilders often score "overweight" despite low body fat. Use alongside waist circumference for a more complete picture.
Hydration Target (litres) = Body Weight (kg) × 0.035. A 70kg person needs 2.45 litres/day at rest — more in heat or during exercise. Add 500ml–1L for every hour of moderate exercise. This is the WHO-aligned formula, more precise than the generic "drink 8 glasses" advice you've likely heard.
BMR = (10×72) + (6.25×170) − (5×28) + 5 = 720 + 1062.5 − 140 + 5 = 1,647.5 kcal
TDEE = 1,647.5 × 1.55 = 2,554 kcal/day
Fat Loss Target = 2,554 − 400 = 2,154 kcal/day
At Balanced split (30% protein): Protein = 2,154 × 0.30 ÷ 4 = 162g/day
FitHealth Pro in Real Life — 4 People, 4 Different Goals
Priya is 31, 5'4" (163cm), 74kg, desk job, no exercise. She enters her details: BMR = 1,450 kcal, TDEE (sedentary, 1.2) = 1,740 kcal, Fat Loss Target = 1,340 kcal. The waist-to-height ratio insight flags her WHR at 0.53 — slightly above the 0.5 safe threshold, flagging abdominal health risk. She uses the grocery blueprint to plan high-protein meals under ₹500/day: eggs, paneer, lentils, and vegetables. No gym required. At 1,340 kcal with 100g+ protein, she loses weight through diet alone while the sleep insight reminds her that her 6-hour sleep habit is actively fighting her progress.
Rohit is 21, 68kg, 175cm, trains 5 days/week (very active, 1.725 multiplier). His TDEE comes out at 3,020 kcal — far more than he expected. His muscle gain target: 3,270 kcal/day. At High Protein split (40% protein), he needs 327g of protein per day — 4.8g/kg body weight, which the insight panel immediately flags as excessive and corrects to a realistic 2.2g/kg = 150g. The budget planner shows his current ₹300/day food budget can't support 3,270 kcal of quality food — he needs ₹450–₹500/day minimum. This insight alone saves him from months of spinning his wheels on an under-fuelled bulk.
Deepa is 33, 82kg, 160cm, 8 months postpartum, lightly active (walks daily, no formal exercise). BMR = 1,598 kcal, TDEE = 2,197 kcal. She selects "Maintain" — not ready for aggressive deficit while breastfeeding. Target: 2,197 kcal with Balanced macros. The hydration insight shows she's drinking only 1.5L/day against a target of 2.87L — and flags this as the likely culprit of her persistent fatigue. The sleep insight notes her 5.5 hours (new mother reality) and explains why cortisol levels are impeding any weight loss she's attempting. The tool gives her context and realistic expectations rather than unrealistic pressure.
Vikram, 38, 95kg, 178cm, diagnosed pre-diabetic, doctor recommended low-carb diet. He selects Ketogenic split. His TDEE at moderate activity: 2,680 kcal. Fat loss target: 2,280 kcal. Keto split gives him: 29g carbs, 171g protein, 164g fat per day. The keto insight panel immediately explains the electrolyte management requirement and the 2–4 week ketosis adaptation period — information his doctor didn't give him. The grocery blueprint generates a keto-specific shopping list: ghee, avocados, fatty fish, spinach, cauliflower. He uses the AED currency option and sees his fitness budget breakdown in his local currency — a detail that matters when planning meals in Dubai's cost environment.
8 Things That Actually Move the Needle on Fat Loss and Muscle Gain
Muscle protein synthesis peaks when protein intake is distributed across 3–4 meals rather than concentrated in one post-workout meal. Aim for 30–40g of protein per meal. In practice: eggs at breakfast, paneer or chicken at lunch, dal and curd at dinner, and a protein-rich snack — without needing a single supplement.
The scale doesn't distinguish fat from muscle from water. Someone doing resistance training can lose 3kg of fat while gaining 2kg of muscle — and feel devastated by a 1kg scale drop. Track waist circumference monthly. A reducing waist with stable or rising weight is a winning scenario. The waist-to-height ratio in this calculator is a better health predictor than scale weight alone.
Research shows sleeping under 6 hours raises ghrelin (hunger hormone) by up to 28% and lowers leptin (satiety hormone) by 18% — making you hungry, less satisfied, and more likely to overeat regardless of your calorie target. Poor sleep also reduces testosterone and growth hormone, directly impairing muscle gain. Protecting 7–9 hours is not optional if you want results from diet and training.
Your TDEE changes as your weight changes. Someone who loses 10kg has a meaningfully lower BMR and TDEE than when they started — eating the same calorie deficit that worked at 90kg may now be maintenance or even a surplus at 80kg. Run this calculator every 5–7kg of change and adjust your target accordingly. Plateaus are often just TDEE catching up with weight loss.
Without strength training, approximately 25–30% of weight lost in a calorie deficit comes from muscle tissue — not fat. Adding even 2–3 resistance training sessions per week dramatically shifts this ratio toward fat loss and muscle preservation. You don't need a gym: bodyweight exercises (push-ups, squats, lunges, rows using a table) provide sufficient stimulus for most people new to training.
A 400-calorie deficit feels very different depending on what fills the gap. 400 calories of vegetables = approximately 2–3kg of food volume, keeping you full for hours. 400 fewer calories from reducing oils or processed snacks leaves you hungry and unsatisfied. Use volume eating — building meals around vegetables — to make a calorie deficit comfortable and sustainable beyond 2 weeks.
Losing more than 1% of body weight per week consistently signals excessive calorie restriction — which accelerates muscle loss, crashes metabolism, and is statistically unsustainable (95%+ of people who lose rapidly regain within 3 years). For a 70kg person, 350–700g/week is optimal. The 400-calorie deficit in this calculator targets approximately 400g/week — the sweet spot of sustainable, muscle-preserving fat loss.
High-protein nutrition doesn't require expensive supplements or premium products. India's most cost-effective protein sources: whole eggs (₹7–₹9 each, 6g protein), soya chunks (₹80–₹100/500g = 50g protein), masoor dal (₹70/500g = 48g protein), low-fat curd (₹30–₹40/500g = 20g protein). A day of 130g protein at ₹300 food budget is entirely achievable without a single protein powder purchase. Use the grocery blueprint feature to see a specific list for your macro targets.
Frequently Asked Questions
The Mifflin-St Jeor equation is the most widely validated BMR formula for healthy non-obese adults, with a typical margin of error of ±10% in research studies. It consistently outperforms older formulas like Harris-Benedict in accuracy. The main source of inaccuracy is the activity multiplier — most people overestimate their activity level by one category. If your calculated TDEE feels too high relative to your actual weight maintenance experience, drop to the next lower activity level and retest. Track your weight daily for 2 weeks at your calculated maintenance calories — if weight stays stable, the number is accurate. If you gain, reduce by 100–150 kcal; if you lose, increase accordingly.
There is no universal answer — it depends entirely on individual BMR, activity level, and goal. However, for a practical guide: a 25–35 year old Indian woman with a desk job and light activity (1–2 walks per week) typically has a TDEE of 1,600–1,900 kcal/day. A safe fat loss target would be 1,200–1,500 kcal/day (never go below 1,200 without medical supervision — this risks nutrient deficiencies and metabolic adaptation). For an active Indian woman (regular exercise 3–5 days/week), TDEE is typically 1,900–2,200 kcal, and a 400-calorie deficit gives a comfortable 1,500–1,800 kcal target. Use this calculator with your specific numbers — a generic "1,200 calories for women" recommendation is both outdated and potentially harmful.
Body fat percentage norms vary by sex and age. For Indian men: 14–20% is healthy/athletic range; 21–24% is acceptable; above 25% is associated with health risks. For Indian women: 21–27% is healthy/athletic; 28–31% is acceptable; above 32% is associated with health risks. Notably, research specifically on South Asian populations (including Indians) shows that metabolic risks like insulin resistance and cardiovascular disease appear at lower body fat percentages compared to Western populations. Indian men with 23–25% body fat may already show metabolic markers that Western guidelines would classify as healthy. The waist-to-height ratio (WHR < 0.5) is considered a better risk indicator for South Asians than BMI or even body fat percentage alone.
Current research consensus (International Society of Sports Nutrition, 2023) recommends 1.6–2.2g of protein per kilogram of body weight per day for muscle growth and retention in individuals who resistance train. For a 70kg Indian man wanting to build muscle: 112–154g of protein/day is the target range. Cost-effective Indian sources to hit this: 4 whole eggs (24g, ~₹36), 200g paneer (36g, ~₹90), 1 cup cooked lentils/dal (18g, ~₹20), 1 cup low-fat curd (10g, ~₹25) = 88g protein at ~₹171. Add 100g soya chunks (52g protein, ~₹20) and you hit 140g protein at under ₹200 — no protein powder required. The grocery blueprint feature in FitHealth Pro generates a week's shopping list optimised for your exact protein target and daily food budget.
Ketogenic diets (typically under 50g carbs/day) are safe and evidence-backed for most healthy adults, with particularly strong evidence for improving insulin sensitivity in pre-diabetic and type-2 diabetic individuals. Research also supports keto for epilepsy management, PCOS, and short-term fat loss. For the general population, keto is not inherently superior to other calorie-controlled diets for fat loss — adherence and total calorie balance determine outcomes regardless of macro split. This calculator's keto macro split targets approximately 5% of calories from carbohydrates — around 25–35g/day depending on your calorie target. The insight panel flags the critical points for keto success: electrolyte management (sodium, potassium, magnesium), the 2–4 week adaptation period, and the importance of fat quality (prioritising unsaturated fats from avocados, nuts, and olive oil over excessive saturated fat). Consult your doctor before starting keto if you have diabetes, kidney disease, or take medication for blood pressure or blood sugar.