Cellular Aging Habit Score
Researchers describe several "hallmarks of aging" inside cells, such as DNA damage, telomere shortening and mitochondrial changes. None can be measured with a questionnaire, and there is no clinical "cellular age" test. This page does not estimate one. It counts general habits with broad health evidence.
Before you start
Method : Cellular Aging Habit Score — a custom points score written by this site. Each answer adds or subtracts the points shown in the Methodology table below.
Validation : Unvalidated. The points have never been tested against any laboratory measurement or health outcome, and the result is not an age.
Review : not reviewed by a qualified clinician. Educational only — not a diagnosis or a medical test.
This score says nothing about disease. If you have symptoms that worry you, see a doctor.
Your answers stay in this browser tab; nothing is sent or stored.
Answer the questions, then press Calculate score.
How to Use This Calculator
- Answer each question.
- Press Calculate score.
- Read the breakdown and suggestions.
Methodology & assumptions
Your score is the sum of the points below. The weights are our own judgement. The old version added made-up years for antioxidants, pollution, chronic illness and other answers and gave a "cellular age". Those were removed with the age output.
| Factor | Answer | Points |
|---|---|---|
| Smoking | Never | 0 |
| Former | +1 | |
| Current | +3 | |
| Physical activity | Little or none | +2 |
| 1–2 days a week | +1 | |
| 3+ days a week | 0 | |
| Sleep per night | Under 6 hours | +1 |
| 6 hours or more | 0 | |
| Body mass index (BMI, kg/m²) | Under 25 | 0 |
| 25–29.9 | +1 | |
| 30 or more | +2 | |
| Alcohol (UK units a week) | 14 or fewer | 0 |
| More than 14 | +1 | |
| Sunburn in the past year | No | 0 |
| Yes | +1 |
Worked examples
Smokes, little activity, under 6 h sleep, BMI 31, more than 14 units, sunburnt this year: 3 + 2 + 1 + 2 + 1 + 1 = +10 points.
Never smoked, active 3+ days, 7 h sleep, BMI 23, 14 units or fewer, no sunburn: 0 points.
Understanding your result
This counts habits you reported. It is not a cellular measurement and not an age. Health-agency guidance linked below is general and based on populations, not on this score.
Sources & further reading
- López-Otín C, Blasco MA, Partridge L, Serrano M, Kroemer G. The hallmarks of aging. Cell 2013;153(6):1194-1217.
- World Health Organization. Physical activity (fact sheet).
The points table is our own convention and is not taken from these sources.
Frequently Asked Questions
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