Use this fertility by age calculator to estimate a typical monthly chance range based on age and get educational guidance on what to do next. Results are estimates for planning and learning.
Enter your age (18+) and how long you’ve been trying. The calculator shows an educational range and a next-step guide that becomes more proactive as age increases. Age is only one factor; timing, cycle regularity, partner factors, and medical history matter too.
Fertility by Age: What It Means
“Fertility by age” describes how the chance of pregnancy tends to change across life stages. Many people search for chances of getting pregnant by age because they want a realistic estimate and a plan. This calculator summarizes typical age-related patterns into a monthly chance range and a simple next-step recommendation based on age and how long you have been trying.
What this calculator does (and does not do)
This tool is educational. It does not diagnose infertility and cannot predict an exact month of conception. It focuses on one major variable—age—and uses broad ranges to avoid false precision. Real-world chances depend on timing, ovulation confirmation, partner sperm factors, frequency of intercourse, and medical conditions.
How to use the result to improve timing
If you are early in the journey, timing is often the most controllable factor. Tracking one or two fertility signs consistently across multiple cycles can be more useful than switching methods every month. If you want a simple place to start, the cervical mucus calculator can support daily tracking. If you chart temperature, the BBT time adjustment calculator can help keep logs consistent.
When to consider evaluation
Many public-health resources suggest considering evaluation after about 12 months of trying if the person with ovaries is under 35, and after about 6 months if 35 or older. Earlier evaluation may be reasonable with very irregular cycles, known medical conditions, or a history of pregnancy loss.
Related tools (optional)
If you want simple cycle planning, the next period calculator can help visualize timing. If pregnancy is confirmed, the pregnancy due date calculator can help with dating and milestones.
Government references
For public-health fertility education, see: MedlinePlus (NIH): Infertility, Office on Women’s Health (HHS): Infertility, and CDC: Infertility FAQ.
Frequently Asked Questions
Tap a question to expand the answer.
Is this fertility by age calculator accurate?
It is accurate as an educational summary of population-level trends. It cannot predict individual outcomes because timing, partner factors, medical conditions, and cycle regularity can change real-world chances.
What does “monthly chance range” mean?
It is a broad estimate of typical probability per month when timing is good. The calculator uses ranges to avoid false precision and over-promising.
Why does fertility usually change with age?
Age is linked to changes in egg quantity and egg quality over time. These are population trends; individuals may vary widely.
When should I consider a fertility evaluation?
Many public-health sources suggest considering evaluation after about 12 months of trying if under 35, and after about 6 months if 35 or older. Earlier evaluation may be reasonable with irregular cycles or known risk factors.
Does cycle regularity affect fertility?
Yes. Irregular cycles can make it harder to identify the fertile window, which can lower chances even when fertility potential is good.
What’s the best way to time the fertile window?
Many people use cervical mucus, BBT, OPKs, or a combination. What matters most is consistent tracking across multiple cycles.
Does partner age matter too?
Yes. Fertility can be influenced by both partners’ health, including sperm factors. Evaluation often includes both partners when trying has taken longer than expected.
Can this calculator tell me when I will get pregnant?
No. It is for education and planning only. It cannot predict a specific month or guarantee an outcome.
How is this different from IVF or IUI success rates?
This calculator summarizes general fertility trends without treatment. IUI and IVF success rates depend on diagnosis, protocols, and clinical factors, so they are separate measures.
What if I recently stopped hormonal contraception?
Return to fertility can vary by method and individual. If you want educational timing context, you may review the pregnancy after contraception tools on this site.
This page is for informational and educational purposes only. It does not provide medical advice, diagnosis, or treatment. Fertility estimates are population-level ranges and cannot account for individual medical history, ovulation timing, partner factors, or underlying conditions. If you have concerns about fertility or have been trying without success, consult a licensed healthcare professional.