HorseAppCompare
Free tool for breeders

Foaling Date Calculator

Predict your mare's foaling date from the covering or insemination date. Includes vaccination milestones and when to involve your vet.

Inputs

Normal range: 320-365 days.

Average gestation is 340 days. Variation from 320-365 days is completely normal.

Expected foaling date
22 September 2027
340 days to go
Earliest (320d)
02 September 2027
Latest (365d)
17 October 2027

Pregnancy milestones

  1. D16
    1st ultrasound (pregnancy confirmation)
    02 November 2026
  2. D30
    2nd scan (heartbeat check)
    16 November 2026
  3. D60
    Sex scan (optional)
    16 December 2026
  4. D150
    Rhinopneumonitis vaccination (5th month)
    16 March 2027
  5. D210
    Rhinopneumonitis booster (7th month)
    15 May 2027
  6. D270
    Rhinopneumonitis 3rd vaccination (9th month)
    14 July 2027
  7. D300
    Tetanus + influenza booster (10th month)
    13 August 2027
  8. D320
    Prepare foaling box + foaling kit ready
    02 September 2027
  9. D330
    Daily udder check + night camera on
    12 September 2027
  10. D340
    Expected foaling date (±15 days normal)
    22 September 2027

Disclaimer: Dates are indications — consult your vet for the vaccination schedule and at first signs of premature foaling.

Want personalised AI analysis?

Our AI looks at your exact inputs and gives tailored advice.

Free · ~10s · Claude AI