toolsPulse tools
Ovulation calculator
A calendar guess from cycle length. Not contraception, not fertility treatment.
Result
2026-09-09
Rough fertile window ~ ovulation ± 2 days. Not contraception.
How to use
- 1Enter cycle length and last period if asked.
- 2Read the fertile-window guess.
- 3If pregnancy matters, use medical contraception advice.
FAQ
- Can I rely on this to avoid pregnancy?
- No. Calendar methods fail. This is a planning sketch.
- Irregular cycles?
- The guess gets worse. Apps with LH tests are still not a doctor.
- Do you keep my numbers?
- No. They stay in this tab until you refresh.
- Is this free?
- Yes. Ads may appear when you copy or run the main action.