Cat Pregnancy Calculator
Track feline gestation stages and the expected queening window.
About Cat Pregnancy Calculator
Feline gestation is slightly longer than canine and more consistent. Cats are induced ovulators, so the mating date is a closer proxy for conception than in dogs. Queens usually deliver without intervention, but knowing the expected date is what makes an overdue or stalled labour recognisable.
Formula
Cat Pregnancy
Feline gestation averages 65 days, with a normal range of 61 to 70 days
- day 21
- Earliest reliable ultrasound confirmation
- nesting behaviour
- Seeking a quiet enclosed space, usually in the final week
Worked example
With the default values below, Cat Pregnancy Calculator returns Days Until Queening of 25. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Days since matingaccepts 0–75 days
- 40 days
- Expected gestation lengthaccepts 58–72 days
- 65 days
Results
- Days Until Queening
- 25 days
- Gestation Stage
- Fetal growth, abdomen becomes visibly enlarged
- Gestation Progress
- 61.54%
- Queening Window Opens on Day
- 60
- Next Milestone
- Prepare the nesting area by day 58
Step by step
- 1Values used
- 2Cat Pregnancy
- 3Days Until Queening= 25 days
- 4Gestation Stage= Fetal growth, abdomen becomes visibly enlarged
- 5Gestation Progress= 61.54
- 6Queening Window Opens on Day= 60
- 7Next Milestone= Prepare the nesting area by day 58
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- This is a general timeline, not veterinary care. Feline pregnancy can involve serious complications. Arrange veterinary supervision for any breeding, and seek immediate help if labour stalls, kittens are not delivered within the expected intervals, or the queen appears unwell.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
This is a general timeline, not veterinary care. Feline pregnancy can involve serious complications. Arrange veterinary supervision for any breeding, and seek immediate help if labour stalls, kittens are not delivered within the expected intervals, or the queen appears unwell.
Frequently Asked Questions
How is Cat Pregnancy calculated?
Feline gestation averages 65 days, with a normal range of 61 to 70 days Feline gestation is slightly longer than canine and more consistent. Cats are induced ovulators, so the mating date is a closer proxy for conception than in dogs.
Why does Cat Pregnancy matter?
Queens usually deliver without intervention, but knowing the expected date is what makes an overdue or stalled labour recognisable.
What values do I need to enter?
This calculator takes 2 inputs: Days since mating, Expected gestation length. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.