Biology
Cat Pregnancy Calculator
Track a cat (queen)'s pregnancy: enter the days since mating to see how far along she is, how many days remain, and the expected queening window.
Your inputs
Change any value to update the result instantly.
Days until expected queening
32 days
Pregnancy completed
50.8 %
Days elapsed
33 days
Stage
Second third of pregnancy
Normal range for this species
58–67 days (typical average 65)
Earliest expected day
58 days
Latest expected day
67 days
Merck lists about 65 days for cats, and 64–66 days from the LH surge that copulation triggers. Educational estimate only — confirm pregnancy and timing with a veterinarian; this tool is not veterinary advice.
What this calculator does
Shows how far a cat's pregnancy has progressed and the expected queening window from a published gestation length.
What your result means
The headline is days remaining to the expected queening date; the range reminds you that birth can occur anywhere in the normal span.
Formula and working
days remaining = gestation length − days elapsed; progress = days elapsed ÷ gestation length × 100
- 1
Collect the inputs
Days since mating = 33 days; Gestation length used = 65 days
- 2
Apply the formula
days remaining = gestation length − days elapsed; progress = days elapsed ÷ gestation length × 100
- 3
Result
Days until expected queening = 32 days
Frequently asked questions
Symbols and assumptions
- L
- Gestation length in days
- d
- Days elapsed since mating
- • Gestation counted from mating.
- • Average 65 days with a 58–67 day working range.
Sources and review
Reviewed 2026-09-22 · Next review 2027-09-22
- • Not a pregnancy test and not veterinary advice; only a veterinarian can confirm pregnancy, litter size or fetal health.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
Related calculators
Cow Gestation Calculator
Track a cow's pregnancy: enter the days since breeding to see how far along she is, how many days remain, and the expected calving window.
Dog Pregnancy Calculator
Track a dog (bitch)'s pregnancy: enter the days since the first successful mating to see how far along she is, how many days remain, and the expected whelping window.
Goat Gestation Calculator
Track a goat (doe)'s pregnancy: enter the days since breeding to see how far along she is, how many days remain, and the expected kidding window.
Guinea Pig Pregnancy Calculator
Track a guinea pig (sow)'s pregnancy: enter the days since mating to see how far along she is, how many days remain, and the expected birth window.
Llama Gestation Calculator
Track a llama's pregnancy: enter the days since breeding to see how far along she is, how many days remain, and the expected birth window.
Mare Gestation Calculator (Horse)
Track a mare's pregnancy: enter the days since the last breeding date to see how far along she is, how many days remain, and the expected foaling window.