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Updated January 2026

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Biological Age Calculator

Estimate your biological age based on functional fitness biomarkers

Your Details

bpm
40Optimal: 45-60100

Measure first thing in morning, before getting up. Lower is generally better.

ml/kg/min
20Optimal: 40-5560

Strongest predictor of all-cause mortality. See guidance below for how to estimate.

kg
15Optimal: 35-5570

Dominant hand, best of 3 attempts. Proxy for muscle mass and mortality.

seconds
0Optimal: 20-4560

Eyes closed, arms at sides. Strong predictor of fall risk.

How to Estimate Your VO2 Max

Apple Watch / Garmin / Whoop:

Most fitness wearables estimate VO2 max. Check your app's health metrics.

Fitness Test (No Equipment):

1-mile walk test: Walk 1 mile as fast as possible, note your time and ending heart rate. Use the Rockport formula.

Quick Estimate by Fitness Level:
  • • Sedentary: 25-30 ml/kg/min
  • • Moderate activity: 30-40 ml/kg/min
  • • Regular exercise: 40-50 ml/kg/min
  • • Highly trained: 50+ ml/kg/min
Use our VO2 Max Calculator
Estimated Biological Age
36years
1 years older

Average

Your biomarkers are typical for your chronological age.

YoungerChronological (35)Older

Biomarker Breakdown

Resting Heart Rate0 years
VO2 Max (Estimate)0 years
Grip Strength0 years
Single-Leg Balance+3 years
Kayla Barnes-Lentz (Age 35)
Resting HR:49 bpm
Grip:44.9 kg
DNA Methylation Age (TruDiagnostics)
23 years(-12 years)
View longevity fitness benchmarks