The free lovebird genetics calculator at lovebirdgenetics.com predicts exactly what chicks you can expect from any Fischer's lovebird pairing â including percentages for every possible mutation combination, with sex-linked mutations split by male and female chick. Here's how to use it in under three minutes.
Enter the mutations of your male and female parent birds. The calculator instantly shows every possible chick type with exact percentages â visual birds, splits, and sex-linked outcomes separated by sex. No sign-up, no download.
Before building this calculator, I worked out pairing ratios by hand for every clutch roughly 20 minutes each with errors still slipping through. Running the same prediction now takes under 10 seconds, and cross-checking its output against actual hatch results has let me validate rare recessive outcomes across three full breeding seasons.
Step 1 â Open the Calculator
Go to lovebirdgenetics.com. The calculator is the main page â it loads instantly with no registration required. You'll see two columns: one for the male parent (â) and one for the female parent (â).
Each column is divided into two sections: Visual (mutations the bird shows visually) and Splits / Carries (hidden recessive genes the bird carries but doesn't show).
Step 2 â Select the Male Parent's Visual Mutations
Under the Male (â) column, tick every mutation your male bird shows visually. Visual means you can see it with your eyes â his feather colour, pattern, and eye colour confirm it.
Examples of visual selections:
- A turquoise male â tick Aqua
- An opaline male â tick Opaline
- A blue male â tick Blue
- A green wild-type male â leave everything unchecked (the calculator assumes wild-type green by default)
If your male shows multiple mutations â for example he is both Opaline and Aqua â tick both boxes. The calculator handles all combinations.
Step 3 â Add the Male Parent's Splits
A split is a hidden recessive gene â the bird carries it but doesn't show it. A green male split for Aqua looks completely normal green, but he can pass Aqua to his chicks.
In the Splits / Carries section under the male column, tick any hidden genes you know he carries. If you're unsure, leave them unchecked â the calculator will still show you results based on what is confirmed.
You usually find out from the breeder who sold you the bird, from the bird's parentage, or by analysing which chicks he has already produced. A split bird looks visually identical to a non-split bird â there is no visual way to confirm it without DNA testing or test pairings.
Step 4 â Set the Female Parent
Repeat the same process for the Female (â) column. Tick her visual mutations first, then tick any splits she carries.
For sex-linked mutations â Opaline, Cinnamon, and Pallid â females cannot be splits. A female either shows the mutation visually, or she doesn't carry it at all. Only tick sex-linked mutations under Splits for male birds. If you select a sex-linked mutation as a female split, the calculator will ignore it.
Step 5 â Press Calculate
Click the green Calculate button. Results appear instantly below the parent input area. No waiting, no page reload.
Step 6 â Read the Results
Results are listed as percentage outcomes for every possible chick type. Here's what a typical result looks like for an Aqua B1 Ã Aqua B1 pairing:
Understanding sex-linked results
When your pairing involves a sex-linked mutation (Opaline, Cinnamon, or Pallid), the calculator shows separate result columns for male chicks and female chicks. This is because female Fischer's lovebirds only have one Z chromosome â they either show a sex-linked mutation or they don't, with no split state possible.
Example: Opaline male à normal female produces 100% split-Opaline male chicks and 100% normal female chicks. The calculator shows this clearly in two separate columns so you know exactly what sexes to expect for each mutation type.
Step 7 â Try More Pairings
The calculator is unlimited. Clear your selections and enter a completely different pairing to compare outcomes. Many breeders test 5â10 theoretical pairings before deciding which birds to put together for a season.
Ready to calculate your pairing?
Free, instant, no sign-up requiredTips for Better Results
Start with what you know for certain
Only enter mutations you can confirm â visual birds you can see, or splits confirmed by the breeder or previous chicks. Guessing splits leads to misleading results. It's better to run the calculation without a split and then re-run it with the split to compare the difference.
Use the blog guides alongside the calculator
If you're not sure which mutations your bird carries or how a specific mutation inherits, the blog articles explain each mutation in detail â including what visual birds look like, how splits work, and which pairings produce the most valuable chicks.
- What Is a Split? â explained simply
- Sex-linked mutations (Opaline, Cinnamon, Pallid)
- Aqua B1, B2, and Homo explained
- Opaline genetics complete guide
Understanding dominant mutations
Mutations like Euwing, Greywing, Misty, Violet, and Dark Factor are autosomal dominant incomplete â they show in SF (single factor) and DF (double factor) forms. You cannot have a "split" for a dominant mutation. If the bird has the gene, it shows. This calculator is one of the only tools that correctly models SF and DF outcomes for these mutations.