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AmitBiswas.in
Free Health Calculators
Start your health journey today!
Try All Calculators Free
AmitBiswas.in
Free Health Calculators
Start your health journey today!
Try All Calculators FreeBMI, BMR, TDEE, Body Fat, Water Intake & Heart Rate Zones — all free with personalized health tips
by Amit Biswas | Health ABCD
Accurate, science-based health insights with personalized tips
Body Mass Index — weight category indicator
Your BMI
--
Enter details
Basal Metabolic Rate (Mifflin-St Jeor)
Your BMR
--
calories/day at rest
Lose Weight
--
Maintain
--
Gain Weight
--
Total Daily Energy Expenditure
Your TDEE
--
calories/day
U.S. Navy Method
Body Fat
--%
Enter measurements
Lean
--
Fat
--
Daily Hydration Needs
Daily Water
-- L
≈ -- glasses
Morning
--
Noon
--
Eve
--
Night
--
Karvonen Formula — Training Zones
Measure in the morning before getting up
Max Heart Rate
-- bpm
Zone 1 — Recovery (50-60%)
--
Zone 2 — Fat Burn (60-70%)
--
Zone 3 — Cardio (70-80%)
--
Zone 4 — Threshold (80-90%)
--
Zone 5 — Max (90-100%)
--
Our free health calculators help you understand your body better. Whether you want to check your BMI, calculate daily calorie needs (TDEE), measure body fat percentage, or find your target heart rate zones — get instant, science-based results with personalized health tips.
A holistic approach to health
Movement & exercise
Whole foods & hydration
Stress management
Self-awareness
Inner peace
Calm your nervous system — reduce stress & anxiety
Set duration per phase (seconds):
Ready
4
Cycle: 0
Inhale
4 sec
Hold
4 sec
Exhale
4 sec
Hold
4 sec
Simple habits for extraordinary health
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