See your estimated pregnancy odds for each day in a typical cycle. Enter the start date of your last period and your average cycle length to see a research-based calendar of approximate chances. Calendar values are statistical estimates based on research averages and the information you enter. They cannot confirm pregnancy, rule out pregnancy, or … Read more
Enter the date and details of one encounter to see a research-based estimate of your pregnancy chance for that single event. The result is a statistical model, not a diagnosis. This calculator shows a statistical estimate based on research averages and the details you enter. It cannot confirm pregnancy, rule out pregnancy, or replace advice … Read more
When you are choosing birth control, it is easy to focus on the method itself, but how you use it also matters. The gap between perfect use (no mistakes) and typical use (real life) can change your pregnancy risk in a meaningful way. What “perfect” vs “typical” use means Perfect use Taking the pill at … Read more
Some contraceptive pairs can reduce protection or add risk. If you want to use two methods at the same time, it is usually safest to choose options that complement each other. The combinations below are ones that guidelines generally advise against, together with alternatives you can discuss with a clinician. Pairs you usually should not … Read more
Curious how your lifestyle and health affect your odds? This advanced calculator lets you add details like age, BMI, and more for a more detailed pregnancy chance estimate. Intercourse times ? Count any events you want to estimate for, regardless of time period. Female age ? Used to estimate baseline fertility and age-related risks. If … Read more
Using two birth control methods at the same time can lower pregnancy risk, especially if at least one method is less dependent on perfect day to day use. The calculator below gives an approximate estimate of protection when you combine methods under typical or perfect use. It is a modelling tool, not a substitute for … Read more
Go Beyond Statistics: Get Your Personal Estimate Standard effectiveness rates don’t tell the whole story. Our Free Advanced Calculator considers your unique profile—including age, BMI, and lifestyle—to generate our most nuanced and accurate estimate. Calculate Your Personal Odds Our Most Popular Tool Explore Other Calculators 💎 Ultimate Calculator 📅 Pregnancy Chance Calendar 🥚 Ovulation Calculator … Read more
Some people choose to use more than one birth control method at the same time. This page summarises combinations that expert guidance from organisations such as the CDC and WHO generally considers reasonable for lowering pregnancy risk, while keeping STI protection in mind. The best combination for you depends on your health history, medicines, and … Read more
Enter your age (and partner’s) to see your pregnancy chance per cycle and per act, how many months it may take to conceive, and when to seek help. We also estimate egg count, miscarriage risk, and IVF/IUI outlook using peer-reviewed data. 💡 Powered by Peer-Reviewed Science Explore other calculators 🥚Ovulation Calculator 📆Menstrual Cycle Calculator 🌡️BBT … Read more
Trying to understand pregnancy risk while using contraception? Get a quick baseline estimate from your method and use pattern. Had a tubal ligation? Check the tubal ligation failure risk for yearly and lifetime odds. If you’re concerned about a recent single encounter, our ‘Am I Pregnant?’ calculator can help you estimate your chances and understand the next … Read more