PrimeCalcPro
Explore 1070+ free calculators — math, finance, health & more.

Ovulation Calculator

Fertile window and ovulation prediction

🌸Ovulation Calculator

Typical: 21–35 days

The ovulation calculator predicts when ovulation is most likely to occur and identifies the fertile window — the days when conception is possible. Ovulation typically occurs 14 days before the next expected period. The fertile window spans 5 days before ovulation, the day of ovulation, and 1 day after, as sperm can survive up to 5 days in the reproductive tract.

💡

Tip: For accurate prediction, track basal body temperature (BBT) and cervical mucus changes. BBT rises 0.2–0.5°C after ovulation. An LH surge (detected by ovulation predictor kits) typically precedes ovulation by 24–36 hours.

🔒
100% Kostenlos
Keine Anmeldung
Genau
Geprüfte Formeln
Sofort
Ergebnisse beim Tippen
📱
Mobilfreundlich
Alle Geräte

Settings

Theme

Light

Dark

Layout

Language

PrivacyTermsAbout© 2025 PrimeCalcPro