Free health and fitness calculators: calculate your BMI, BMR, TDEE, body fat percentage, and ideal weight all in one place. Track your wellness journey with accurate results.
Get a complete picture of your health metrics in one place. Enter your basic information to calculate BMI (body mass index), BMR (basal metabolic rate), TDEE (total daily energy expenditure), body fat percentage, and ideal weight range. All results update instantly as you adjust your inputs.
BMI
22.9
Normal
BMR
1,649.00 kcal
TDEE
2,556.00 kcal
Moderate
Body Fat
23.50%
Ideal Weight
70.50 kg
68.90–68.70 kg range
Example
**Example: 30-Year-Old Male, 175cm, 70kg**
• **BMI:** 22.9 → Normal weight range
• **BMR:** ~1,630 kcal/day (calories needed at rest)
• **TDEE:** ~2,530 kcal/day (moderate activity)
• **Body Fat:** ~16% (advanced measurement needed)
• **Ideal Weight:** ~68 kg (Devine formula)
**Interpretation:** This individual has a healthy BMI, moderate body fat percentage, and needs about 2,530 calories daily to maintain weight with moderate exercise. To lose weight, reduce intake by 300-500 kcal/day.
BMR uses the Mifflin-St Jeor formula. Body fat uses the US Navy circumference method. Ideal weight uses the Devine formula. These are estimates — consult a healthcare professional for personalized advice.
Frequently Asked Questions
What is the most accurate way to measure body fat?
DEXA scans, hydrostatic weighing, and BodPod are the most accurate methods. The US Navy circumference method used here provides a reasonable estimate within 3-4% of these lab methods.
What BMR formula does this calculator use?
We use the Mifflin-St Jeor equation, which is considered the most accurate for the general population. For men: 10xweight(kg) + 6.25xheight(cm) - 5xage(y) + 5. For women: 10xweight + 6.25xheight - 5xage - 161.
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese. BMI is a screening tool - it doesn't account for muscle mass or body composition.