Biological Age Calculator
Estimate your biological (functional) age from 12 lifestyle and health factors — heart rate, exercise, blood pressure, diet, sleep, smoking, stress and more — grouped into four dimensions with a breakdown of what's aging you faster or slower than your years.
Input
Cardiovascular & Fitness
Metabolic & Body
Lifestyle & Recovery
Mental & Social
Output
| Metric | Value |
|---|---|
| No data yet | |
Guides
What is biological age?
Your chronological age is just the number of years since you were born. Your biological (or functional) age is an estimate of how old your body actually behaves, based on the lifestyle and health factors that speed up or slow down aging — things like cardiovascular fitness, diet, sleep, stress, and smoking. Two 45-year-olds can have very different biological ages depending on how they live.
This calculator scores 12 factors across four dimensions — Cardiovascular & Fitness, Metabolic & Body, Lifestyle & Recovery, and Mental & Social — and adds up how many years each factor adds or subtracts from your chronological age.
How the score works
Each answer maps to a fixed number of years, added to or subtracted from your chronological age:
| Dimension | Factors |
|---|---|
| Cardiovascular & Fitness | Resting heart rate, exercise frequency, blood pressure |
| Metabolic & Body | BMI category, diet quality, daily water intake |
| Lifestyle & Recovery | Average sleep, smoking status, alcohol consumption |
| Mental & Social | Stress level, social connections, mental stimulation |
The 12 deltas sum to a total, which is added to your chronological age (floored at 1 year) to produce your estimated biological age. The results table also breaks the total down by dimension, and the tool flags the single dimension pulling your score up the most — the highest-leverage place to focus first.
How to use it
- Enter your chronological age.
- Answer each lifestyle question with your closest match.
- Your estimated biological age, the difference from your real age, a per-dimension breakdown, and a "biggest opportunity" suggestion update instantly as you change any answer.
FAQ
Is this a medically validated test? No. This is a simplified, transparent point model for general self-reflection — not a clinical epigenetic-age test (like a DNA-methylation clock) or a diagnostic tool. It's meant to highlight lifestyle patterns worth paying attention to, not to produce a medically precise number.
Why do smoking and chronic stress carry such large penalties? Both are consistently linked in longevity research to accelerated biological aging — smoking through oxidative stress and cardiovascular damage, chronic stress through sustained cortisol elevation — so they're weighted more heavily than smaller factors like water intake.
Does this calculator store my data? No. Everything runs in your browser — your answers and results are never sent to or stored on our servers.
Can my biological age be negative or lower than expected? The estimate is floored at 1 year, but otherwise there's no cap — someone who scores well on every factor can land well below their chronological age, which reflects the model's built-in per-factor point range rather than any real biological floor.
Is this medical advice? No. This tool is for informational and motivational purposes only. For guidance on your actual health risks, talk to a doctor.
Use it from code
From 3 credits per callREST API
curl -X POST https://api.iotools.cloud/v1/tool/biological-age-calculator \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"age": "35",
"restingHeartRate": "50-60",
"exerciseFrequency": "active",
"bloodPressure": "optimal",
"bmiCategory": "normal",
"dietQuality": "excellent",
"waterIntake": "excellent",
"sleep": "7-8",
"smokingStatus": "never",
"alcoholConsumption": "none",
"stressLevel": "low",
"socialConnections": "strong",
"mentalStimulation": "high"
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `biological-age-calculator` tool (Biological Age Calculator) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.