By Zencalcy Editorial TeamLast reviewed About us
Discover how statistically unique you are based on your eye color, hair color, blood type, handedness, height, and birthday. Get a personalized rarity score and find out how many people share your exact combination of traits.
How Rare Are You? | Find Your Uniqueness Score
Every human is a unique combination of genetic traits. While individual traits like brown eyes or right-handedness are common, the specific combination of ALL your traits together can be statistically rare.
If Trait A occurs in 10% and Trait B in 5%, the combined probability is 0.10 x 0.05 = 0.005, or 1 in 200.
Combined = P(eye) x P(hair) x P(blood) x P(hand) x P(height) x P(birthday) x P(age)
The calculator uses population statistics from peer-reviewed studies across Global, European, and US populations.
Each trait has a different prevalence in the population.
About 10% are left-handed. September is the most common birth month (9%), December the least (7.2%).
Green Eyes + Red Hair + AB- Blood
2% x 1.5% x 1% = 1 in 333,333 people.
Left-Handed + Very Tall + Gray Eyes
10% x 5% x 1% = 1 in 20,000 people.
Blue Eyes + Blonde + Tall + December Birthday
9% x 5% x 5% x 7.2% = 1 in 61,728 people.
Feb 29 Birthday + Ambidextrous + Amber Eyes
0.25% x 1% x 0.5% = 1 in 8,000,000 people.
P(A and B) = P(A) x P(B)
Example: green eyes (2%) AND left-handed (10%) = 0.2% or 1 in 500.
Brown eyes (41%) x Brown hair (45%) x O+ (38%) x Right-handed (89%) x Average height (50%) x September birthday (9%) x Adult (28%)
= 0.000786 = 1 in 1,272 people
| Color | Global | US | Europe |
|---|---|---|---|
| Brown | 70% | 41% | 45% |
| Blue | 9% | 33% | 30% |
| Green | 2% | 9% | 10% |
| Amber | 0.5% | 1% | 1% |
Source: Verywell Health
Left-handed + green eyes: 10% x 2% = 0.2% (1 in 500)
Left-handed + AB- blood: 10% x 1% = 0.1% (1 in 1,000)
Want to explore more about your traits? These related calculators can help you understand specific aspects of your biology and uniqueness:
This calculator estimates how statistically rare your combination of physical traits is among the world's 8 billion people. It uses probability multiplication: each trait has a known prevalence in the population, and we multiply those probabilities together to find the combined rarity.
How it works: If green eyes occur in 2% of people and red hair in 1.5%, having both traits means a 0.03% probability (about 1 in 3,333). The calculator performs this for all 7 traits you select and assigns a rarity score from 0 to 100.
Data sources: Population statistics come from WHO, Red Cross, NHS, and peer-reviewed studies on eye color genetics.
Limitations: The calculation assumes traits are statistically independent. In reality, some traits are genetically correlated (e.g., eye and hair color share pigmentation genes). This means the calculated rarity may be slightly higher than the true combined probability.
Results are for entertainment and self-discovery. Every human is unique and valuable regardless of their rarity score.
Your rarity score is calculated by multiplying the statistical probabilities of each of your traits together. For example, if green eyes occur in 2% of the population and red hair in 1.5%, the combined probability is 0.02 × 0.015 = 0.0003, meaning 1 in 3,333 people have both traits.
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Content Updated At : 29/08/2026