Genetics,
made visual.
Punnett squares, allele frequencies and inheritance patterns – genetics made clear. Free, instant, and private.
Jean Borg
Founder & developer · How I build these →
Genetics · example
Punnett
Phenotype ratio
3 : 1
Aa × Aa cross
5
Genetics tools
100%
Free, no sign-up
0
Data stored
1 hr
To build a request
All 5 tools
Browse every genetics calculator.
Transparent math
Every cross,
shown step by step.
No black boxes. Every tool shows the exact method or formula it used – so you can check it, trust it, and learn it.
Try the Punnett Square ›# Hardy–Weinberg
p² + 2pq + q² = 1
# Monohybrid cross
phenotype ratio → 3 : 1
# Dihybrid cross
ratio → 9 : 3 : 3 : 1Questions
Genetics questions.
Are these genetics calculators really free?
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Yes – every one is completely free, with no sign-up, no account, and no paywalled results.
How accurate are the results?
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They follow Mendelian and Hardy–Weinberg rules and are accurate for education – not genetic counselling or medical advice.
Is my data saved anywhere?
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No. Every calculation runs locally in your browser – nothing you enter is stored or sent anywhere.
Can you add a genetics calculator I need?
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Yes – request it via the contact page and it can be built and made live fast, free of charge.
The developer
Built by a real person.
Jean Borg
Founder & developer · freecalculators.pro · Malta
I build and maintain every calculator on this site myself, from my desk in Malta. No faceless company and no outsourced content – each tool is coded by hand, shows the exact formula it uses, and gets fixed the moment something’s off. Need a calculator that isn’t here yet? Email me and it’s usually live within the hour, free.
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