Enter the date of mating to calculate your cat's estimated due date, current pregnancy week, and care tips for each stage.
The calculator turns the date your cat was mated into an estimated kitten due date, then tells you which pregnancy week she is in today. It is built around the feline gestation period of 63–65 days (about 9 weeks). Here is how to use it:
Treat the result as an estimate, not an exact date. Cats can deliver a few days either side of the average, so use the window rather than a single day when planning.
Feline pregnancy runs across roughly nine weeks, split into three trimesters. This timeline shows the main changes to expect and what your cat needs at each stage.
| Week | What Is Happening | What She Needs |
|---|---|---|
| 1–2 | Fertilisation and implantation; no visible signs | Normal diet and routine |
| 3 | Nipples "pink up" and enlarge; ultrasound can confirm | First vet check |
| 4–5 | Possible mild morning sickness; abdomen begins to round | Begin switching to kitten food |
| 6 | Belly clearly swollen; appetite increases | Feed free-choice kitten food |
| 7–8 | Kittens gain weight; movement may be felt | Set up a quiet nesting box |
| 9 | Nesting, restlessness; birth (queening) occurs | Monitor closely; vet on call |
This chart shows the estimated earliest, average, and latest due dates counted from the mating date, using the 58-day, 64-day, and 67-day marks of the feline gestation period.
| Days Since Mating | Stage | Meaning |
|---|---|---|
| 58 days | Earliest safe delivery | Kittens born before this rarely survive without intensive care |
| 63–65 days | Average due window | Most healthy litters arrive here |
| 67 days | Upper end of normal | Still within range for most queens |
| 68+ days | Overdue | Contact your vet if no kittens have arrived |
Early feline pregnancy is subtle, but a handful of reliable signs appear over the first few weeks. A vet can confirm pregnancy by ultrasound from around week 3–4.
Good nutrition and a calm environment give the kittens the best start. These are the essentials for supporting a pregnant queen:
Seeing the math applied makes it easier to plan. Here are three examples using the 63–65 day average feline gestation period.
Counting about 63–65 days from 1 March gives an estimated due window of roughly 3–5 May, with a normal range from 28 April (58 days) to 7 May (67 days).
If your cat mated across Friday to Sunday, use the first day for the earliest due date and the last day for the latest. The result is a slightly wider due window that accounts for uncertainty about the exact conception day.
If you did not see the mating, a vet can estimate the stage by ultrasound (from week 3) or X-ray (after week 7). You can then work backward to approximate a mating date and forward to a due window.
In the final days before queening, your cat's behaviour shifts noticeably. Watching for these signs helps you be ready and know when something is wrong.
Cats are pregnant for approximately 63–65 days (about 9 weeks), with a normal range of 58–67 days. This is the feline gestation period. Kittens born before 58 days are unlikely to survive without intensive care. If your cat has not delivered by day 67–68, contact your vet.
The feline gestation period is 58–67 days, averaging 63–65 days. This is roughly the same as dogs. Unlike dogs, cats can go into heat again within weeks of giving birth, so unspayed cats can become pregnant very frequently.
A cat is pregnant for approximately 9 weeks (63–65 days). The pregnancy is divided into three trimesters of roughly 3 weeks each. Visible signs such as abdominal swelling typically appear from week 4–5 onward.
Signs include nipple "pinking up" (rosy, enlarged nipples) around week 3, mild morning sickness, increased appetite, and abdominal swelling from week 5. A vet can confirm pregnancy by ultrasound as early as week 3–4.
Week 1–2: fertilisation and implantation. Week 3: nipples begin to pink and enlarge. Week 4–5: morning sickness possible, ultrasound can confirm kittens. Week 5–6: abdomen visibly rounds. Week 7–8: kittens gain significant weight, movement may be felt. Week 9: birth typically occurs.
From week 4, transition your cat to a high-quality kitten food, which is more calorie-dense. From week 5–6, feed free-choice (ad libitum). Ensure fresh water is always available. Avoid raw food, which can carry pathogens harmful to foetuses.
Average litter size is 4 kittens, but ranges from 1–12. First-time mothers tend to have smaller litters. A vet can estimate litter size by ultrasound at 3–4 weeks or by X-ray after week 7.
Signs include restlessness, excessive grooming of the genital area, nesting behaviour, refusal to eat, heavy panting, and uterine contractions. Most queens give birth without complications, but contact your vet if no kittens arrive after 2 hours of active contractions.
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FAQs
Cats are pregnant for approximately 63–65 days (about 9 weeks), with a normal range of 58–67 days. This is the feline gestation period. Kittens born before 58 days are unlikely to survive without intensive care. If your cat has not delivered by day 67–68, contact your vet.
The feline gestation period is 58–67 days, averaging 63–65 days. This is roughly the same as dogs. Unlike dogs, cats can go into heat again within weeks of giving birth, so unspayed cats can become pregnant very frequently.
A cat is pregnant for approximately 9 weeks (63–65 days). The pregnancy is divided into three trimesters of roughly 3 weeks each. Visible signs such as abdominal swelling typically appear from week 4–5 onward.
Signs include nipple "pinking up" (rosy, enlarged nipples) around week 3, mild morning sickness, increased appetite, and abdominal swelling from week 5. A vet can confirm pregnancy by ultrasound as early as week 3–4.
Week 1–2: fertilisation and implantation. Week 3: nipples begin to pink and enlarge. Week 4–5: morning sickness possible, ultrasound can confirm kittens. Week 5–6: abdomen visibly rounds. Week 7–8: kittens gain significant weight, movement may be felt. Week 9: birth typically occurs.
From week 4, transition your cat to a high-quality kitten food, which is more calorie-dense. From week 5–6, feed free-choice (ad libitum). Ensure fresh water is always available. Avoid raw food, which can carry pathogens harmful to foetuses.
Average litter size is 4 kittens, but ranges from 1–12. First-time mothers tend to have smaller litters. A vet can estimate litter size by ultrasound at 3–4 weeks or by X-ray after week 7.
Signs include restlessness, excessive grooming of the genital area, nesting behaviour, refusal to eat, heavy panting, and uterine contractions. Most queens give birth without complications, but contact your vet if no kittens arrive after 2 hours of active contractions.
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