Free Tools

Fertility calculator

Find your fertile window and ovulation day, or estimate a due date — with the reasoning shown, not just a number.

Your cycle

The gap between ovulation and your next period. 14 days is typical.

OVULATION IN – – DAYS

– – –

Enter your last period date to see results

Ovulation day
Next period
Earliest reliable test

Day-by-day conception chance

Relative likelihood of conception if intercourse happens on each day.

IF YOU CONCEIVE THIS CYCLE

Based on 266 days from ovulation. A dating scan will refine this.

These estimates are educational and assume regular cycles. Irregular bleeding, PCOS or thyroid conditions change the picture — our team can help you interpret yours.

Speak to us

Dr. Adakings

AI fertility guide · online
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Hello, I'm Dr. Adakings

Ask me anything about fertility, cycles, IVF,
donation or surrogacy. Everything you share
stays on this device.

Educational guidance only — always confirm with your clinician.