Period Date Predictor — Next 6 Cycles + Ovulation + Fertile Window
Predict your next 6 periods, ovulation day, and fertile window. Free, adjustable cycle (21–45 days) and period (2–10 days). Great for trying-to-conceive planning.
When is my next period?
Next period starts
Thu, July 30, 2026
Days until next
21
Ovulation day
Thu, July 16, 2026
Next 6 cycles
Period 1
Thu, July 30, 2026
→ Mon, August 3, 2026
Ovulation
Thu, July 16, 2026
Fertile window
Sat, July 11, 2026 → Fri, July 17, 2026
Period 2
Thu, August 27, 2026
→ Mon, August 31, 2026
Ovulation
Thu, August 13, 2026
Fertile window
Sat, August 8, 2026 → Fri, August 14, 2026
Period 3
Thu, September 24, 2026
→ Mon, September 28, 2026
Ovulation
Thu, September 10, 2026
Fertile window
Sat, September 5, 2026 → Fri, September 11, 2026
Period 4
Thu, October 22, 2026
→ Mon, October 26, 2026
Ovulation
Thu, October 8, 2026
Fertile window
Sat, October 3, 2026 → Fri, October 9, 2026
Period 5
Thu, November 19, 2026
→ Mon, November 23, 2026
Ovulation
Thu, November 5, 2026
Fertile window
Sat, October 31, 2026 → Fri, November 6, 2026
Period 6
Thu, December 17, 2026
→ Mon, December 21, 2026
Ovulation
Thu, December 3, 2026
Fertile window
Sat, November 28, 2026 → Fri, December 4, 2026
Predictions assume a regular cycle. The luteal phase (ovulation → next period) is the more stable half — about 14 days for most people — so ovulation is estimated as next-period-start minus 14 days. The fertile window covers the 5 days before ovulation plus the day of ovulation itself.
Trying to conceive? Use the fertile window above. Already pregnant? Switch to Due date to find when baby arrives.
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How prediction works
We add your cycle length to the start of your last period to forecast the next 6. The luteal phase (ovulation → next period) is the more stable half — about 14 days for most people — so ovulation is estimated as next-period-start minus 14 days. The fertile window covers the 5 days before ovulation plus the day of ovulation itself.
For TTC (trying to conceive)
Intercourse during the fertile window — especially the 2 days before ovulation — has the highest chance of conception. For contraception, do NOT rely on calendar predictions alone — they're unreliable for irregular cycles.
How to use the Period Date Predictor (Next + Fertile Window)
Takes about a minute. No signup, no download, your data stays in your browser.
- 1Open the tool. Scroll up to the Period Date Predictor (Next + Fertile Window) above — it loads instantly in your browser, no install needed.
- 2Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
- 3Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.
Frequently asked questions
Common questions about the Period Date Predictor (Next + Fertile Window).
Is the Period Date Predictor (Next + Fertile Window) free to use?
Yes. The Period Date Predictor (Next + Fertile Window) on 7BusyBoss is completely free — no signup, no paywall, no usage cap.
Do I need to sign up to use the Period Date Predictor (Next + Fertile Window)?
No. The Period Date Predictor (Next + Fertile Window) works instantly in your browser — no account needed. Signing in with Google is optional and only unlocks features like saving favorites and higher AI build limits.
Does the Period Date Predictor (Next + Fertile Window) work on mobile?
Yes. Every tool on 7BusyBoss is mobile-responsive and works in any modern browser — Chrome, Safari, Firefox, Edge — on phones, tablets and desktops.
Is my data safe when I use the Period Date Predictor (Next + Fertile Window)?
Yes. The Period Date Predictor (Next + Fertile Window) runs entirely in your browser — your inputs never leave your device unless the tool explicitly fetches public data (e.g. currency rates). We don't store the values you type.
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