Skip to content

CALCULATOR · Pets

Cat Pregnancy Calculator

Enter the mating date to see your cat’s estimated due date, the normal 58–72 day delivery window, how many days she is into the pregnancy and which stage she has reached.

Show formula
due date = mating date + 64 days · normal window 58–72 days

Inputs

Calendar

Every date field, picker and result uses this calendar.

optional

Breed does not change the due date — feline gestation runs 63–65 days for every breed.

Result

Your result appears here

Enter Mating date and the result fills in as you type.

How it works

  1. Enter the date your cat mated — or the earliest likely date if you are not certain.
  2. Optionally add her name so the result reads naturally.
  3. Read the estimated due date, the normal delivery window, how far along she is and which stage she has reached.

Frequently asked questions

How long are cats pregnant?

Feline gestation averages 63 to 65 days from mating. Anything from 58 to 72 days is considered normal, which is why the calculator shows a window rather than a single certain date.

What if I do not know the exact mating date?

Use the earliest date mating could have happened. That gives the earliest plausible due date, so you prepare sooner rather than later. A vet can date the pregnancy more precisely by ultrasound from around day 21.

When can pregnancy actually be confirmed?

Ultrasound can usually detect kittens from about three weeks, and x-ray can count skeletons from around day 42. A calculator can only ever estimate from a date you supply.

What if she goes past the window?

Kittens born before day 58 are often premature, and a pregnancy running past day 72 should be checked. Contact your vet rather than waiting.

Is this veterinary advice?

No. It is date arithmetic on published averages, meant to help you plan. Your vet is the only reliable source for your cat’s health.

Examples

Mated on 1 March 2026 — when are the kittens due?
Around 4 May 2026 (day 64), within a normal range of 28 April to 12 May.
Mated on 1 March 2026 — how far along on 5 April?
Day 35 — week 6, with 29 days to go to the due date.

Related calculators