Ovulation Calculator
Ovulation date, fertile window, next period from LMP and cycle length
Average is 28 days (range: 21–45 days)
Ovulation Date (estimated)
Thursday, 20 August 2026
Fertile Window Start
Saturday, 15 August 2026
5 days before ovulation
Fertile Window End
Friday, 21 August 2026
1 day after ovulation
Next Expected Period
Thursday, 3 September 2026
Fertile Window (best days to conceive)
Sat
15 Aug
Sun
16 Aug
Mon
17 Aug
Tue
18 Aug
Wed
19 Aug
Thu
20 Aug
Peak
Fri
21 Aug
This is an estimate based on average cycle patterns. Actual ovulation can vary. For accurate tracking, use ovulation predictor kits (OPK) or basal body temperature (BBT) charting. Consult a doctor for fertility concerns.
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Calculated with CalcCrack