Health & Body Age Tools
These pages are grouped by body system so you can go straight to the question you have — your heart, your sleep, your joints. A few use published equations (such as the Framingham heart-age model); most are transparent checklists or habit scores that show every point and threshold they use.
No page here diagnoses anything or measures your true biological age. Each tool labels whether it uses a published equation or this site's own unvalidated score, and lists its sources. Nothing you enter is stored.
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Heart Age Calculator (Framingham)
Heart age and 10-year risk from the published Framingham 2008 equation (ages 30–74)
Biological Age Explained + Habit Score
What biological age is, plus an educational habit score (not a lab test)
Sleep Age Calculator
Sleep habit score against the 7+ hour adult guideline (not a sleep study)
Menopause Age Calculator
Compare your age with typical menopause timing (NIH figures); not a personal prediction
Heart, lungs & circulation
Heart age uses the published Framingham equation; the others count risk factors against public thresholds.
Heart Age Calculator (Framingham)
Heart age and 10-year risk from the published Framingham 2008 equation (ages 30–74)
Cardiovascular Age Calculator
Count of heart risk factors using NHS blood-pressure thresholds (not a risk score)
Vascular Age Calculator
Count of artery risk factors; links the published Framingham vascular age
Lung Age Calculator
Lung age from a measured FEV1 and height, using the Morris & Temple (1985) equation
Metabolism, organs & nutrition
Checks for metabolism, digestion, hydration and organ-related habits. These are habit and symptom checklists, not lab results.
Metabolic Age Calculator
Resting calories (BMR) from the Mifflin-St Jeor equation; optional age comparison from a measured RMR
Liver Age Calculator
Count of liver disease risk factors from NHS guidance (not a liver test)
Kidney Age Calculator
Count of kidney disease risk factors from NHS guidance (not an eGFR test)
Pancreas Age Calculator
Count of type 2 diabetes risk factors (not a test)
Thyroid Age Calculator
Checklist of symptoms with possible thyroid causes (not a blood test)
Hormonal Age Calculator
Checklist of symptoms with possible hormonal causes (not a hormone test)
Gut Health Age Calculator
Score of fibre, food and activity habits (not a gut test)
Microbiome Age Calculator
Score of diet habits studied in microbiome research (not a stool test)
Nutrition Age Calculator
Eating habits compared with NHS Eatwell guidance (not a diet assessment)
Hydration Age Calculator
Hydration habits against the NHS 6–8 glasses guide (not a test)
Brain, mind, sleep & senses
Memory, reaction time, mood, stress, sleep, hearing, eyesight and voice. Reflection quizzes are labelled as such.
Brain Age Calculator
Habit score based on modifiable dementia risk factors (not a brain test)
Cognitive Age Calculator
Checklist of noticed memory and focus changes plus habits (not a cognitive test)
Memory Age Calculator
Checklist of memory changes and common treatable factors (not a memory test)
Reaction Time Age Calculator
Score of sleep, alcohol and other factors that slow reactions (not a timed test)
Mental Age Calculator
Light self-reflection on curiosity and learning habits (not an IQ test)
Emotional Age Calculator
Light self-reflection on everyday emotional skills (not an EQ test)
Stress Age Calculator
Stress load and support score (not a mental-health test)
Sleep Age Calculator
Sleep habit score against the 7+ hour adult guideline (not a sleep study)
Hearing Age Calculator
Checklist of hearing symptoms and noise exposure worth a hearing test (not a test)
Vision Age Calculator
Checklist of eye symptoms and habits worth an eye exam (not an eye test)
Eye Age Calculator
Checklist of eye-disease risk factors with NHS eye-test advice (not an eye test)
Voice Age Calculator
Checklist of voice symptoms and habits with NHS advice (not a voice test)
Muscles, bones & movement
Strength, balance, flexibility, posture and body measurements. Some use simple at-home tests you can repeat over time.
Body Measurements Check
BMI, waist-to-height and resting pulse against WHO/NHS reference points
Muscle Age Calculator
Score of strength habits and everyday tasks (not a strength test)
Bone Age Calculator
Compare a reported bone age with exact age on the X-ray date
Joint Health Age Calculator
Checklist of joint pain, stiffness and swelling with NHS advice (not a diagnosis)
Spine Health Age Calculator
Checklist of back symptoms and habits with NHS urgent signs (not a diagnosis)
Posture Age Calculator
Score of sitting, desk setup, movement and back-pain habits (not an assessment)
Flexibility Age Calculator
Score of stretching, sitting and stiffness habits (not a measured test)
Balance & Coordination Age Calculator
Checklist of falls, unsteadiness and balance exercise (not an assessment)
Ageing biology explained
Explainers for lab-based ageing clocks (epigenetic, telomere, GrimAge) with a habit score — these pages cannot run the lab test itself.
Biological Age Explained + Habit Score
What biological age is, plus an educational habit score (not a lab test)
Epigenetic Lifestyle Score
What epigenetic age is, plus an educational score of linked habits (not a DNA test)
Telomere Lifestyle Score
What telomeres are, plus an educational score of linked habits (not a lab test)
GrimAge Explained + Habit Score
What the GrimAge DNA clock measures, plus an educational habit score (not a GrimAge test)
Cellular Age Calculator
Score of general habits; explains why cellular age can't be self-measured
Mitochondrial Age Calculator
Score of activity habits; explains why mitochondria can't be self-measured
Inflammation Age Calculator
Score of habits linked with chronic inflammation (not a CRP test)
Immune Age Calculator
Score of vaccination and lifestyle habits (not an immune test)
Skin, teeth & life stages
Skin and dental habits, menopause timing, fertility by age, and sobriety milestones.
Skin Age Calculator
Score of sun-protection and smoking habits (not a skin examination)
Dental Age Calculator
Compare a child's teeth with the ADA eruption chart for their exact age
Menopause Age Calculator
Compare your age with typical menopause timing (NIH figures); not a personal prediction
Fertility Age Calculator
Checklist of fertility factors and when the NHS suggests seeing a GP (not a test)
Sobriety Age Calculator
Track your clean time in years, months, and days from your sobriety date with recovery milestones