Mare Gestation Calculator
Calculate your mare’s pregnancy due date
Estimated Foaling Date
Mare Care Advice
How to Use the Mare Gestation Calculator
- Open the Tool
- Copy the provided HTML code and save it as an HTML file (e.g.,
mare-gestation-calculator.html
). - Open it in a web browser (Chrome, Firefox, Edge, etc.).
- Copy the provided HTML code and save it as an HTML file (e.g.,
- Select Language (Optional)
- The tool supports 10 languages (English, Spanish, Chinese, French, German, Japanese, Russian, Arabic, Urdu, Hindi).
- Use the dropdown menu at the top-right to choose your preferred language.
- Enter Breeding Date
- Click on the date field and select the date your mare was bred.
- The default date is set to today, but you can change it.
- Calculate Due Date
- Click the “Calculate Due Date” button.
- The tool will instantly display:
- Estimated foaling date (based on 340-day gestation period).
- Pregnancy stage advice (early, mid, late, or imminent foaling).
- View Results & Advice
- The results will appear below the button.
- You’ll also see care tips based on how far along your mare is.
Additional Features
- Right-to-Left (RTL) Support: Automatically adjusts for Arabic & Urdu.
- Saves Language Preference: Remembers your selected language for future visits.
- Mobile-Friendly: Works smoothly on phones, tablets, and desktops.
Example Calculation
- Breeding Date: June 1, 2024
- Estimated Foaling Date: April 27, 2025 (340 days later)
- Advice: If checked today (May 2024), it would show early pregnancy care tips.

Frequently Asked Questions (FAQs) for your Mare Gestation Calculator
Mare Gestation Calculator – FAQs
1. How accurate is this calculator?
✅ Very accurate for estimation – The calculator uses the average 340-day gestation period for horses. However, actual gestation can vary between 320-370 days depending on breed, season, and mare health. Always consult a vet for precise monitoring.
2. Can I use this for other animals?
🐴 Designed for horses – This tool is specifically for mares (female horses). For other animals (Swine, Sheep, etc.)
3. Why does the due date change when I switch languages?
🌍 Date formatting only – The calculation remains the same, but dates display differently based on language (e.g., April 27, 2025 → *27 نيسان 2025* in Arabic).
4. My mare’s gestation was shorter/longer than 340 days. Is this normal?
✔️ Yes! While 340 days is average, healthy foals can be born as early as 320 days or as late as 370 days. Factors like breed (e.g., ponies often have shorter pregnancies) and nutrition play a role.
5. How do I prepare for foaling?
📋 Key steps:
- Late pregnancy: Increase feed quality, prepare a clean/straw-bedded foaling area.
- Signs of labor: Restlessness, udder swelling, waxing of teats (1-2 days before birth).
- Emergency plan: Have a vet’s number ready.
6. Does this tool save my data?
🔒 No privacy concerns – The calculator runs entirely in your browser. No breeding dates or results are stored online.
7. Why is the advice different for early/mid/late pregnancy?
📌 Tailored recommendations:
- Early (<240 days): Focus on diet/exercise.
- Mid (120–240 days): Increase nutrition gradually.
- Late (<120 days): Monitor for labor signs.
8. What if my mare goes past the due date?
⚠️ Don’t panic yet – Some mares deliver safely up to 370 days. Contact your vet if:
- No signs of labor by day 350.
- Unusual discharge or behavior.
9. How can I share this tool?
📲 Direct link: Share https://freeconvertersandcalculators.com/mare-gestation or recommend it on horse forums!