Fertility Window Calculator

गर्भधारण की कोशिश के लिए सबसे अच्छे दिन जानें

Whether you're trying to conceive or trying to avoid it, knowing your fertile window matters. Your chances of conceiving are highest in the 1-2 days before ovulation and on the day of ovulation itself.

Enter your last period date and average cycle length to get your estimated ovulation date, fertile window, and next expected period.

---

How It Works | कैसे काम करता है

We estimate ovulation as 14 days before your next expected period (based on your cycle length), then mark a 7-day fertile window around it — 5 days before ovulation through 1 day after.

---

Frequently Asked Questions | अक्सर पूछे जाने वाले सवाल

Answers written for Indian women — honest, practical, and doctor-verified.

How accurate is this calculator?

It's a reasonable estimate for regular cycles, but ovulation can shift with stress, illness, travel, or irregular cycles. An ovulation predictor kit (LH strips) adds real-time accuracy.

Can I get pregnant outside the fertile window?

It's less likely but not impossible, especially with irregular cycles where ovulation timing shifts. The fertile window is a probability range, not a hard rule.

What if my cycles are irregular?

This calculator works best with fairly regular cycles. If yours vary by more than a week, consider our Irregular Period Diagnosis Helper or track basal body temperature alongside.

How long should we try before seeing a doctor?

Generally, see a doctor after 12 months of trying if you're under 35, or after 6 months if you're 35 or older.

---

More Free Health Tools | और हेल्थ टूल्स

Explore more tools built for Indian women.

Period & Safe Period Calculator
Track your full cycle and safe days Pregnancy Due Date Calculator
Already pregnant? Find your due date Birth Control Matcher
Not trying yet? Find your best method

Disclaimer: This calculator provides estimates based on average cycles, not a medical or fertility diagnosis. Consult a gynaecologist for personalised fertility planning.