About the Baby Eye Color Calculator
Baby Eye Color Calculator shows the chance that a baby will have brown, green or blue eyes, based on the eye colours of the two parents. Choose each parent's colour and the page gives a percentage for each colour from a simple, widely used model of how eye colour is inherited. Real eye colour is shaped by many genes, so the numbers are a guide and not a promise: two blue-eyed parents can very rarely have a child with green or even brown eyes, and a baby's eyes often change in the first year.
Updated October 2026
How to use the Baby Eye Color Calculator
- 1Choose the eye colour of parent 1.
- 2Choose the eye colour of parent 2.
- 3Read the chance of brown, green and blue eyes.
- 4Remember that a newborn's eye colour can change over the first months.
- 5Copy the result.
The simple model behind the numbers
A classic way to explain eye colour is a two gene model. One gene decides brown or not brown, with brown dominant. A second decides green or blue, with green dominant over blue. Under this model two brown eyed parents who both carry hidden blue genes can have a blue-eyed child with 6.25% odds, and two blue-eyed parents almost always have a blue-eyed child.
What the percentages mean
For every pair of parent colours the page gives a percentage for each outcome. Brown with blue gives a 50% chance of brown and 50% of blue, since the brown parent may carry a blue gene. Green with green gives 75% green and 25% blue. These are the chances for any one child, and each baby is a fresh draw.
- Brown + brown: 75% brown, 18.75% green, 6.25% blue
- Brown + blue: 50% brown, 50% blue
- Green + green: 75% green, 25% blue
- Blue + blue: about 99% blue
Why real life is messier
Scientists have found that eye colour depends on many genes, so the true chances differ from the simple table, and a child can differ from both parents. Treat the result as a playful guess. The colour you see at birth may also change, so wait before you buy a baby book with a prediction.
Related tools
Check which blood types are possible with the Blood Type Calculator, plan with the Pregnancy Due Date Calculator, and try the Punnett Square Calculator for other traits. The Child Height Predictor estimates adult height.
Features
- Percent chance for brown, green and blue
- Based on a simple, widely used model
- Handles all colour pairs
- Instant result
- Explains the limits of the model
- Private: nothing is uploaded
Frequently asked questions
How are eye colours inherited?
The simplest model uses two genes: brown is dominant over green, and green is dominant over blue. Real inheritance involves at least a dozen genes, so it is more complex.
Can two blue-eyed parents have a brown-eyed baby?
Under the simple model no, and in practice it is extremely rare. The page shows a small chance of green for two blue-eyed parents.
Why do babies' eyes change colour?
Many babies, especially with European ancestry, are born with blue or grey eyes. Melanin builds up over the first six to twelve months, and the final colour is usually clear by about three years.
What about hazel and grey eyes?
They are combinations of the same pigments. Hazel is closest to green and light brown, and grey is closest to blue. Choose the nearest colour.
How accurate is the calculator?
It follows a common simplified table. It is good for a rough idea and for fun, but it cannot predict an individual child.
Does it use the grandparents' eyes?
No. Grandparents' eyes can show hidden genes, which is why a child can have a colour that neither parent has, but this page uses only the two parents.
Is a blue-eyed baby possible from brown eyed parents?
Yes. If both parents carry a hidden blue gene, the chance is about 6%.
Is anything stored?
No. The calculation happens in your browser.