Cat Color Calculator
Free online cat color genetics calculator. Select the breed and appearance of the sire and dam to predict kitten coat colors, patterns and probabilities based on feline color genetics.
Enter the appearance of both parents to calculate color predictions.
Run your cattery like a modern studio.
One system instead of spreadsheets, notes and tool switching.
Start for free nowHow the EMS Color Calculator Works
The felineStudio color calculator analyses 11 genetic loci — from Agouti (A) to Inhibitor (I) — and computes all possible offspring phenotypes according to the EMS standard (Easy Mind System) defined by FIFe. The result shows you the exact probability percentage for every possible coat color combination.
The EMS system encodes coat color, pattern, white-spotting, and pointing in a unified notation. Each EMS code — for example MCO ns 22 for Black Silver Classic Tabby — unambiguously describes the phenotypic expression of an animal. The calculator supports all FIFe-recognized breeds and color variants.
Professional breeders use the color calculator to identify carrier animals for recessive alleles (chocolate, dilution, colourpoint), avoid unwanted color combinations, and strategically plan breeding goals. With registered access you can additionally use the full genotype editor to manually enter known alleles for more precise predictions.
Cat color calculator: frequently asked questions
- How does the cat color calculator work?
- Enter the breed and appearance of the sire and dam and the cat color calculator applies feline coat-color genetics across the 11 EMS loci, returning every possible kitten coat color and pattern with its probability.
- Can it predict a kitten's coat color before birth?
- Yes. From the parents' colors and any known carrier genes, this cat genetics calculator predicts the probability of each coat color and pattern in the litter. It shows likelihoods, not guarantees, because hidden recessive carriers can still surprise you.
- What is a cat genetics calculator?
- A cat genetics calculator models how color, pattern, dilution, white-spotting and pointing alleles pass from sire and dam to kittens. felineStudio covers every FIFe-recognised breed and EMS color code.
- Is the cat color calculator free?
- Yes, the online cat color calculator is completely free with no sign-up. Registered breeders also get a full genotype editor to enter known alleles for more precise kitten color predictions.