Health & Fitness Calculators
BMI, calorie, TDEE, pregnancy, BAC, and other personal health calculators.
15 calculators
About Health & Fitness Calculators
Health calculators help you understand the numbers behind your body and wellness — from a basic BMI check to a detailed calorie and macro breakdown for a specific fitness goal. These tools use the same formulas that healthcare providers and researchers use, explained in plain language.
Important: health calculator results are general estimates for educational purposes. They are not medical diagnoses or personalized advice. If a result concerns you or you're managing a health condition, consult a qualified healthcare provider.
Tips for Using These Calculators
- BMI is a screening tool, not a diagnosis. Use it alongside waist measurements and body fat percentage for a fuller picture.
- TDEE estimates your maintenance calories — this is where to start if you want to build a calorie goal for weight loss or gain.
- BAC calculators are for educational awareness only. Never rely on a calculated BAC to decide whether it's safe to drive.
- Pregnancy calculators assume a 28-day cycle. If your cycle is shorter or longer, your actual due date may differ.
Frequently Asked Questions
How accurate are health calculators?
Health calculators use validated formulas (like Mifflin-St Jeor for BMR, or the WHO classification for BMI) but produce estimates, not measurements. Individual biology, body composition, and health history all affect real-world results.
Can I use these calculators to track progress over time?
Yes — calculators like BMI, calorie, and TDEE are useful for tracking changes when used consistently with the same measurement method. Note any changes in inputs (like updated activity level or weight) to keep comparisons meaningful.