Baby Eye Color Calculator – Predict Your Baby’s Eye Color
Estimate your baby’s potential eye color based on the genetics of both parents. Simply choose each parent’s eye color, and our calculator will show the most likely results with easy-to-understand percentages.
Baby Eye Color Genetics Calculator
Select each parent’s eye color to estimate your baby’s eye-color probability using our genetics-based calculator.
The child's eye color ：
Brown: 75% | Green: 18.75% | Blue: 6.25%
Brown eyes are most likely because brown is dominant over green and blue. Green or blue are less likely due to recessive genes.
What Determines a Baby’s Eye Color?
A baby’s eye color is determined by a combination of genes inherited from both parents, influenced by dominant and recessive alleles. Brown alleles are typically dominant, while green and blue are recessive, with green being dominant over blue. This means even parents with the same eye color can have a child with a different eye color. Eye color inheritance involves multiple genes working together, creating a wide range of possible colors. Our calculator uses a simplified Mendelian model to provide probabilities, giving you a clear estimate of your baby’s likely eye color. Babies’ eye color may also change in the first months or years after birth, usually darkening over time.
How to Calculate Baby Eye Color
This calculator estimates your baby’s potential eye color by applying the three-allele Mendelian genetics model. It analyzes how different gene combinations from both parents can influence traits such as brown, green, and blue eyes.
Eye Color Genetics in the Three-Allele Mendelian Model
The model assumes that eye color is controlled by three alleles: B (brown), G (green), and b (blue). Their dominance hierarchy follows B > G > b, meaning brown is dominant over green and blue, and green is dominant over blue. Each parent contributes one allele, forming a pair that determines eye color.
How the Calculator Predicts Probabilities
Based on the eye colors you select for each parent, the calculator generates all possible allele combinations a child could inherit. It then applies Mendelian inheritance ratios to estimate the probability of each eye color—brown, green, or blue—using realistic genetic patterns.
Important Notes and Limitations
Human eye color is influenced by multiple genes, not just one. The three-allele model offers a simplified and widely accepted prediction method, but results are still probabilistic, not guaranteed. Environmental factors and additional genetic variations may also affect actual eye color.
How to Use the Baby Eye Color Calculator
Follow these simple steps to predict your baby’s potential eye color and understand how genetics shape the final result.
Select Parents’ Eye Colors
Choose the eye color for both the mother and father. These selections form the basis of the genetic combinations used in the calculation.
Apply the Genetics Model
The calculator uses the three-allele Mendelian model, combining dominant and recessive traits to generate realistic eye-color probabilities.
View Probability Results
Review the estimated chances of brown, green, or blue eyes. You’ll see how different genetic pairs influence your baby’s most likely eye color.
Different Eye Colors Explained
Learn how Brown, Green, Blue, Hazel, and Gray eyes get their unique colors. Each eye color is determined by melanin levels and light interactions in the iris, creating the wide variety of shades seen in humans.
Brown Eyes
Brown eyes are the most common worldwide, caused by a high concentration of melanin in the iris, giving them their deep, rich color and dominance over other eye colors.
Blue Eyes
Brown eyes have a high concentration of melanin in the iris. This pigment gives them their deep, rich color and makes them dominant over other eye colors.
Green Eyes
Green eyes result from a moderate amount of melanin combined with yellow pigment called lipochrome, creating a unique green shade.
Hazel Eyes
Hazel eyes are a mix of brown and green, often appearing to shift color in different lighting, caused by varied melanin distribution.
Gray Eyes
Gray eyes are rarer than green and hazel eyes, arising from structural variations in the iris stroma that affect how light is reflected.
Baby's Eye Color Probability Chart
This chart provides a simplified prediction of your baby’s eye color based on the selected eye colors of both parents. It uses a fixed-percentage approach derived from the three-allele Mendelian genetics model, making it easy to understand and interpret. The table presents approximate probabilities for brown, green, and blue eyes for common parent combinations. It is simplified for clarity and practicality, so actual results may vary slightly due to additional genetic factors or interactions not represented in this model. Use this chart as a guide to understand potential outcomes. For more personalized results, enter parent eye colors into the calculator above.
| Parents’ Eye Colors | Brown | Green | Blue |
|---|---|---|---|
| Blue + Blue | 0% | 1% | 99% |
| Blue + Green | 0% | 50% | 50% |
| Blue + Brown | 50% | 0% | 50% |
| Green + Green | 0% | 75% | 25% |
| Green + Brown | 50% | 37.5% | 12.5% |
| Brown+ Brown | 75% | 18.75% | 6.25% |
Changes in Eye Color
Many babies are born with blue or gray eyes, but the final eye color usually develops over time. Genetics influence how and when the color changes, so the initial eye color may differ from the predicted permanent color.
When Does Eye Color Change?
Babies’ eye color usually starts changing between 6 and 12 months, and some changes may continue up to 18 months. The color at birth may differ from the final shade.
Why Does Eye Color Change?
Eye color changes as melanin develops in the iris. Genetics determine how much melanin is produced, which gradually darkens or alters the eye color over time.
What Does the Calculator Predict?
The calculator predicts the likely permanent eye color based on parent genetics using the three-allele Mendelian model, not the temporary color at birth.
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Find Your Baby’s Likely Eye Color
Get a quick prediction based on simple Mendelian genetics. Enter both parents’ eye colors to see your baby’s most probable result.
FAQs of Baby Eye Color Calculator
Answers to common questions about baby eye color, how it can change after birth, and how our calculator predicts likely outcomes using genetics.
How accurate is a baby eye color predictor?
Baby eye color calculators use Mendelian genetics to give probability-based predictions, not guarantees. For example, two green-eyed parents may have a 25% chance of a blue-eyed baby. Actual outcomes can vary due to hidden recessive genes.
Can two brown-eyed parents have a blue-eyed baby?
Yes. Even if both parents have brown eyes, they may carry recessive blue-eye genes. For example, if both parents are genetically “Bb” (brown-dominant, blue-recessive), there’s a 25% chance their baby will have blue eyes.
Is a baby’s eye color fixed at birth?
No. Most babies are born with blue or gray eyes, which may gradually change as melanin develops in the iris. The final eye color usually appears between 6 and 12 months, and sometimes up to 18 months.
Why am I green-eyed when my parents aren’t?
This can happen if both parents carry recessive green or blue genes. For example, if both parents are “Bb” (brown) or “Bg” (brown/green), the child can inherit two non-brown alleles, resulting in green eyes even though neither parent appears green-eyed.
How does the calculator determine probabilities?
The calculator uses the three-allele Mendelian model (Brown > Green > Blue) to combine parent genotypes and generate fixed percentages. For example, a brown + green parent combination might show 50% brown, 37% green, 13% blue.
Can grandparents’ eye colors affect my baby’s prediction?
Yes. Your child’s eye color probabilities are influenced by hidden recessive genes from grandparents. For instance, if a grandparent has blue eyes, it can increase the chance that brown-eyed parents pass a blue allele to the baby.