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
Mon, June 15, 2026
Days until next
21
Ovulation day
Mon, June 1, 2026
Next 6 cycles
Period 1
Mon, June 15, 2026
→ Fri, June 19, 2026
Ovulation
Mon, June 1, 2026
Fertile window
Wed, May 27, 2026 → Tue, June 2, 2026
Period 2
Mon, July 13, 2026
→ Fri, July 17, 2026
Ovulation
Mon, June 29, 2026
Fertile window
Wed, June 24, 2026 → Tue, June 30, 2026
Period 3
Mon, August 10, 2026
→ Fri, August 14, 2026
Ovulation
Mon, July 27, 2026
Fertile window
Wed, July 22, 2026 → Tue, July 28, 2026
Period 4
Mon, September 7, 2026
→ Fri, September 11, 2026
Ovulation
Mon, August 24, 2026
Fertile window
Wed, August 19, 2026 → Tue, August 25, 2026
Period 5
Mon, October 5, 2026
→ Fri, October 9, 2026
Ovulation
Mon, September 21, 2026
Fertile window
Wed, September 16, 2026 → Tue, September 22, 2026
Period 6
Mon, November 2, 2026
→ Fri, November 6, 2026
Ovulation
Mon, October 19, 2026
Fertile window
Wed, October 14, 2026 → Tue, October 20, 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.
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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