Cat Pregnancy Calculator — when will she give birth? 🗓️

Fertilisation, then implantation (around day 10–12). The queen shows no outward signs yet — looks and behaviour stay completely normal.

💡 Record the mating date precisely — the whole season's math builds on it.

The classic early sign: nipples turn pink and enlarge slightly (around day 15–21). Some queens show mild nausea or appetite changes.

A vet can palpate the embryos (around day 20–30), and ultrasound picks up heartbeats. Appetite starts climbing.

💡 The ideal window for a confirmation visit — and never press on her abdomen.

The belly rounds out clearly and appetite runs high. Skeletons calcify, so an X-ray can count the kittens from around day 42–45.

💡 Upgrade her food gradually — many breeders switch to energy-rich kitten food from here.

Kitten movement may be seen or felt along her sides. She grooms more and slows down.

Milk glands develop and milk may appear. The queen starts scouting for a safe, quiet birthing spot.

💡 Set up the nesting box now in a warm quiet corner — before she picks a spot you won't like.

Nesting intensifies and she may go off food before labour. A temperature drop below 37.8°C usually precedes labour by about a day.

💡 Keep the emergency vet's number and clean towels ready — and watch from a distance; most births need no intervention.

Feline gestation averages 63–65 days from mating, with a realistic window of 61–67 days. That's why this calculator gives you an honest due WINDOW with real dates — no single 'guaranteed day' exists scientifically.

The classic early sign is 'pinking up': nipples turn pink and enlarge around day 15–21. A vet can palpate the embryos around day 20–30, ultrasound picks up heartbeats, and an X-ray can count the kittens from around day 42–45 once skeletons calcify.

Nesting (hunting for a safe quiet spot), a temperature drop below 37.8°C about a day before labour, going off food, and restless grooming. Set the nesting box up from week eight — before she picks a spot of her own.

Commonly 3–5 kittens, with a normal range from a single kitten to 8 or more. An accurate count comes from a vet X-ray after day 42–45.

Commonly cited cases: passing day 67 with no labour, strong continuous straining with no kitten, or a long pause between kittens with visible distress. This calculator is general breeder guidance, not a substitute for a vet — when in doubt, call yours.

Weaning starts around week four and usually completes around week eight. The accepted ethical standard in the cat fancy is handover from 12 weeks up — after full socialisation with mother and siblings and both vaccination shots.