Fact Checked by: Dr. Sarah Jenkins, Genetic Specialist
Predicting your baby’s features is one of the most exciting parts of pregnancy. Use our kid eye color calculator to discover the genetic probabilities of your child having brown, blue, or green eyes based on parental traits.
Kid Eye Color Calculator
Predicted Probabilities:
Kid Eye Color Calculator Formula
The calculation is based on the Davenport Model of genetics, which treats eye color as a single-gene trait (though modern science knows it is polygenic).
Probability (P) = (Parental Genotype Mix) / Punnett Square Distributions
Reference: American Academy of Ophthalmology
Variables:
- Brown: Considered a dominant trait (requires only one allele).
- Blue: Considered a recessive trait (requires two alleles).
- Green: An intermediate trait often linked to the HERC2 and OCA2 genes.
What is Kid Eye Color Calculator?
A kid eye color calculator is a digital tool that uses genetic probability models to estimate what color eyes a child might inherit from their biological parents. While eye color genetics are complex and involve multiple genes (polygenic), most calculators use a simplified model involving the three most common colors: brown, blue, and green.
This tool is particularly popular for expecting parents who want to visualize their future child’s appearance. It’s important to note that because genetics can carry “hidden” recessive genes from grandparents, surprises occasionally happen where a child’s eye color doesn’t match the most likely statistical outcome.
How to Calculate Kid Eye Color (Example)
- Identify Phenotypes: Determine the eye color of both biological parents.
- Determine Genotypes: For example, if both parents have blue eyes, they likely carry only recessive blue alleles.
- Apply Punnett Square: Cross-reference the colors. For instance, Blue x Blue results in a ~99% chance of a blue-eyed child.
- Interpret Results: Understand that these are statistical likelihoods, not certainties.
Related Calculators
Frequently Asked Questions (FAQ)
Can two blue-eyed parents have a brown-eyed child? It is extremely rare but genetically possible due to the polygenic nature of eye color and potential mutations.
At what age is a baby’s permanent eye color set? Most babies’ eye colors settle between 6 and 12 months, though changes can occur up to age 3.
Is brown always dominant over green? Generally, yes. In simple models, brown is dominant to both green and blue.
Are these predictions 100% accurate? No, they are based on statistical probability models and cannot account for all genetic variations.