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About this Tool

This calculator estimates a cat's queening date based on the average feline gestation period.

How Long is a Cat Pregnant?

The average gestation period for cats is **63 days** from the date of mating. This is the date used to calculate the primary due date.

However, the actual gestation can be as short as 58 days or as long as 71 days. Our calculator provides this full date range to give you a clearer window for when to expect the kittens.

Signs of Cat Pregnancy

While this calculator provides an estimate, only a veterinarian can confirm pregnancy. Common signs to look for include:

• **"Pinking-up":** The nipples become swollen and a darker pink, typically around 15-18 days into the pregnancy.
• Increased appetite and weight gain.
• A swollen, distended belly (this becomes more obvious after a few weeks).
• Increased affectionate or "nesting" behaviors.