Free Ovulation Calculator for New Zealanders
Ovulation typically happens about 14 days before the next period (luteal phase). The fertile window covers the 5 days before ovulation and the day of ovulation itself, when sperm can survive in the reproductive tract.
Your cycle
today
28 days
days
5 days
days
Estimated ovulation date
21 May 2026
around 14 days before the next period
Based on a cycle length of 28 days, last period 7 May 2026.
Fertile window starts16 May 2026
Fertile window ends22 May 2026
Period length5 days
Next period start4 Jun 2026
About our Ovulation Calculator
Disclaimer: This calculator is for information only and does not constitute financial advice. Real-world figures may differ due to fees, rounding, rate changes, and policy specifics. Always confirm figures with the relevant provider before signing anything.