Skin Sun-Habit Score
Sun exposure and smoking are the best-known outside causes of skin aging, and UV exposure also raises skin cancer risk. This page does not estimate a "skin age". It counts sun-protection and smoking habits.
Before you start
Method : Skin Sun-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.
A new, changing, bleeding or unusual mole or spot should be checked by a doctor or dermatologist.
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 years for water intake, moisturiser, sleep and diet and gave a "skin age". Those links are weak or unproven, so they were removed; the remaining questions focus on UV and smoking.
| Factor | Answer | Points |
|---|---|---|
| Time in strong sun | Little | 0 |
| Some most weeks | +1 | |
| Hours most days | +2 | |
| Broad-spectrum SPF 30+ on exposed skin outdoors | Daily | 0 |
| Sometimes | +1 | |
| Rarely or never | +2 | |
| Sunburns in the past year | None | 0 |
| One | +1 | |
| Two or more | +2 | |
| Indoor tanning beds | Never | 0 |
| In the past | +1 | |
| Currently | +2 | |
| Smoking | Never | 0 |
| Former | +1 | |
| Current | +2 |
Worked examples
Hours in strong sun most days, rarely uses sunscreen, two or more sunburns, currently uses tanning beds, smokes: 2 + 2 + 2 + 2 + 2 = +10 points.
Little strong sun, daily SPF 30+, no sunburns, never tanned indoors, never smoked: 0 points.
Understanding your result
This counts habits you reported. It is not a skin measurement and not an age. Health-agency guidance linked below is general and based on populations, not on this score.
Sources & further reading
The points table is our own convention and is not taken from these sources.
Frequently Asked Questions
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