Horse Song Ranch - Foaling Calculator
Enter dates - Calculate - Print page - Write mare's name in notes section.
Calculate an approximate due date
Enter last breeding date in format
 mm/dd/yyyy:

Desired gestation duration:

Estimated foaling date:
 
Number of days mare in foal calculator
Enter last date mare was bred:

Enter today's date:


Estimate of days mare is in foal
NOTES

Pregnancy vaccination schedule calculator

Enter last breeding date:

This will give you the dates of ultrasound, palpation and vaccinations

Ultrasound/Palpation at 14 days/
2 weeks
Ultrasound/Palpation at 28 days/
4 weeks
#1 Rhinopneumonitis optional at 3 months/
84 days/12 weeks
#2 Rhinopneumonitis at 5 months/
140 days/20 weeks
#3 Rhinopneumonitis at 7 months/
196 days/28 weeks
#4 Rhinopneumonitis at 9 months/
252 days/36 weeks
All vaccines at 11 months/
308 days/44 wks
Due date, based on
343 days/49 weeks
You should average plus or minus 10 days for actual foaling window.
From personal experience, Miniatures foal around +/- 330 days!