Health Tools

Ovulation & Fertile Window Calculator

Calculate your ovulation date, fertile window, and next period based on your cycle length

Your Cycle Details
28
Average: 28 days
14
Ovulation: day 14
Fertile Window
Current phase based on your cycle
Key Dates — Current Cycle
Last Period StartedMay 6, 2026
Fertile WindowMay 15, 2026 – May 21, 2026
Ovulation DayMay 20, 2026
Next Period ExpectedJun 3, 2026
Next Fertile WindowJun 12, 2026 – Jun 18, 2026
Next OvulationJun 17, 2026
May 2026 Cycle Calendar
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Period
Fertile
Ovulation

This tool is for educational purposes. Cycle predictions are estimates. Consult a healthcare provider for fertility planning.

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