What this calculator does
The Cat Pregnancy Calculator estimates how many days remain until a pregnant cat (queen) is due to give birth (queening), based on the number of days since mating.
The method it uses
Feline gestation typically lasts around 63 to 65 days, with 64 days commonly used as the average. This calculator subtracts the days already elapsed from that average to estimate the days remaining, and also reports how many weeks pregnant the cat is and what percentage of the pregnancy is complete.
Individual cats vary, and litter size can shift the actual delivery date by a few days. This tool is for general planning purposes only; consult a veterinarian for confirmed pregnancy staging and due-date estimates.
Last reviewed August 2026