💪 Health & Fitness Guides — BMI, Calories, TDEE & Body Composition
2 expert guides · Free calculators included
2
Articles
6
Free Calculators
5–15 min
Reading Time
2026
Updated
BMI, calories, BMR, body composition, sleep. Step-by-step guides with worked examples and free calculators.
What You Will Learn in Health & Fitness
Health metrics like BMI, TDEE, BMR, and body fat percentage are more useful than most people realise — but only when calculated correctly and interpreted in context. BMI alone can misclassify muscular people as overweight. TDEE without activity factor underestimates caloric needs.
These guides explain each metric correctly: the formula, how to calculate it, what the result means, and what to do with it. The calorie guides are particularly important — most people underestimate their maintenance calories by 200–400 kcal/day, which is why eating less often does not produce expected weight loss.
Every guide links to the free calculator so you can compute your exact numbers based on your age, height, weight, and activity level.
🧮 Free Calculators in This Category
Every guide links to one of these — run your own numbers.
BMI Calculator
Body mass index with health range context
OpenCalorie Calculator
Daily calories by age, weight, activity level
OpenTDEE Calculator
Total daily energy expenditure for your body
OpenBMR Calculator
Calories burned at complete rest
OpenBody Fat Calculator
Estimate body fat % from measurements
OpenMacro Calculator
Protein, carbs, fat targets for your goal
Open📚 All Health & Fitness Articles (2)
BMI Guide 2026: What Your BMI Actually Means (And What It Misses)
BMI is one of the most misunderstood health metrics. A BMI of 25 in a muscular person is healthy; the same BMI in someone with 35% body fat is risky. Here is what BMI really tells you -- and what to use instead.
Calorie Calculator Guide: How to Lose Weight Without Starving
To lose 1 kg of fat, you need a 7,700 calorie deficit. At 500 calories/day deficit, that is 1 kg in 15 days -- without any supplements or crash diets. Here is the exact science behind TDEE, macros, and sustainable weight loss.
❓ Frequently Asked Questions
Detailed answers to the most common questions in this category — with real numbers and examples.
📖 Topics Covered in Health & Fitness
how to calculate BMI accurately with formula and example
what is TDEE and how to use it for weight loss
how many calories should I eat per day for my weight
BMR vs TDEE difference explained simply
body fat percentage calculator how to measure accurately
how to calculate ideal weight for height India
calorie deficit for weight loss how to calculate safely
macros calculator how to calculate protein carbs fat
how to calculate calories burned during exercise
sleep calculator how many hours do I need by age
All topics above are covered in the guides in this category, with free calculators for each.