✓ Medically reviewed · ✓ Evidence-based
Know your numbers.
Own your longevity.
215 free, science-backed health calculators — from biological age to cardiovascular risk — each with a personalized visual report.
Popular: BMI FIB-4 BMR & TDEE
Longevity Tools
The calculators that matter most for healthspan — how old your heart, lungs, muscles and metabolism really act, and the fitness markers that predict it.
Heart Age
How old your cardiovascular system acts compared with your real age.
🔥Metabolic Age
Your metabolism measured against your birth year.
🫀VO2max Estimator
The strongest single fitness predictor of long life.
🫁Lung Age
Spirometry translated into the age your lungs behave like.
🚶Gait Speed
Geriatric medicine’s favorite vital sign, timed in ten meters.
✊Grip Strength
Your squeeze as a percentage of the age expectation.
⚖️Balance Age
One leg stance time compared with decade norms.
👂Hearing Age
The highest frequency you hear versus the years it implies.
Most popular calculators
BMI Calculator
Body mass index with full body-composition report.
❤️ASCVD Risk Score
10-year heart risk with projection chart.
🔥BMR & TDEE
Daily calorie needs by age, weight, activity.
New🫁FIB-4 Index
Liver fibrosis screening from routine labs.
😴STOP-BANG
Sleep apnea risk in 8 quick questions.
🩸HOMA-IR
Insulin resistance from fasting glucose + insulin.
Every calculator returns a visual report — not just a number
Risk spectrums, age-matched comparisons, body composition breakdowns and 10-year projections — generated instantly, personalized to your inputs.