Pet Gestation Calculator
Work out days left until birth from species gestation length and days since mating.
Quick answer: enter your details below and click Calculate Gestation — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Pick the species.
- Enter days since mating.
- Click Calculate Gestation.
About this tool
Pick the species and enter days since mating, and the tool gives the usual gestation length and days remaining. These are typical lengths, not veterinary advice, and real births vary, so confirm timing and care with your vet.
Frequently asked questions
Is this veterinary advice?
No. It is a guide to typical lengths. Pregnancy care and birth planning should involve a vet.
What if days since mating is unknown?
Ask your vet about dating the pregnancy, since guessing can leave you unprepared.