Ovulation Calculator
Track your fertile window and ovulation date
Average: 28 days
Ovulation Date
Tue, Mar 31
Most fertile day
Next Period
Tue, Apr 14
In 14 days
Fertile Window
Thu, Mar 26 - Wed, Apr 1
6-day window with highest chance of conception
Cycle Calendar
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Period Fertile Ovulation
Key Dates
| Last Period Started | Tuesday, March 17, 2026 |
| Fertile Window Starts | Thursday, March 26, 2026 |
| Ovulation Day | Tuesday, March 31, 2026 |
| Fertile Window Ends | Wednesday, April 1, 2026 |
| Next Period Expected | Tuesday, April 14, 2026 |
Understanding Your Cycle
- Ovulation: Typically occurs 14 days before your next period
- Fertile Window: 5 days before and 1 day after ovulation
- Peak Fertility: The 2 days before and day of ovulation
- Egg Survival: 12-24 hours after ovulation
- Sperm Survival: Up to 5 days in the reproductive tract
Important Notes
This calculator provides estimates based on average cycle patterns. Actual ovulation timing can vary due to stress, illness, medications, and other factors. For more accurate tracking, consider using ovulation predictor kits (OPKs) or basal body temperature monitoring. Consult a healthcare provider for fertility concerns.