Ovulation Calculator
Jenzzy estimates ovulation near cycle midpoint and highlights fertile days before and after.
Inputs
Results
Enter values to see results.
Formula
Ovulation ≈ LMP + (Cycle length − 14)
Luteal phase is often ~14 days; ovulation shifts with longer or shorter cycles.
Example
- Ovulation day: Day 16 ≈ Mar 16
- Fertile window: Mar 11–17= Mar 11–17
Result: Fertile window approximately March 11–17
Frequently Asked Questions
LH kits?
Ovulation tests detect hormone surge—often more precise.
PCOS?
Cycles may be irregular; medical guidance recommended.
Contraception?
Fertility awareness is not reliable birth control alone.