Reviewed by Dr. Grace Ramosena, MBChB on Jan 25, 2026 Enter your draws, hit Calculate, and you’ll get your exact doubling time, a 48-hour projection, a saveable log-scale chart, and see if your results are Faster / Within typical / Slower / Declining based on the latest clinical ranges. hCG Draw 1 Date and time … Read more
See how levonorgestrel emergency contraceptive pills compare with ulipristal acetate emergency contraceptive pills by hours since intercourse, weight/height, and number of encounters. Get your estimated pregnancy chance and your first accurate test day. Method Levonorgestrel (LNG)Ulipristal acetate (UPA) Hours since intercourse Enter a number from 0 to 168. Female age Advanced options Number of intercourse … Read more
Missed a birth control pill? Enter pill type, how late, where you are in the pack, and whether you had intercourse to estimate your per-act pregnancy risk. No data stored. 💡 Powered by Peer-Reviewed Science Related calculators Contraceptive Risk Per-act risk by method and use quality. Combine Methods Estimate risk when using two methods together. … Read more
Enter your ultrasound date and the gestational age reported on the scan (weeks + days) to get your estimated due date. Ultrasound date Gestational age at scan — weeks Gestational age at scan — days Calculate > EDD: — Gestational age today: — Methodology & sources EDD from ultrasound: EDD = scan date + (280 … Read more
Enter your embryo transfer date and embryo day (3/5/6) to get your estimated due date instantly. Had an IUI? The IUI due date calculator gives EDD and key milestones. Transfer date Embryo day at transfer Day 3 (cleavage)Day 5 (blastocyst)Day 6 Pregnancy type (optional) SingletonTwinsTriplets EDD is always 40 weeks; multiples often deliver earlier. We’ll … Read more
Wondering when your twins or triplets are due? Enter your details to get an instant 40-week EDD and the typical delivery window for multiples (based on the dating method you choose). Curious about odds? See the chance of twins for your age and history. Twin & Triplet Due Date Calculator Number of babies Twins Triplets … Read more
Trying to pinpoint your due date from a specific event? Whether you know the date of intercourse or your estimated conception date, our calculator accounts for key biological factors to give you the most accurate possible timeline. Intercourse Date Conception Date Date of Intercourse Assumes conception happens 0 to 2 days after intercourse. Use the … Read more
Reviewed by Dr. Grace Ramosena, MBChB on Jan 25, 2026 Enter LMP, due date, or ultrasound to estimate your conception date and likely intercourse window. We also show a timeline of key pregnancy dates. Last Period Due Date Ultrasound First day of last period Average cycle length (days) Estimated Due Date Date of Ultrasound Gestational … Read more
Enter your DPO or LMP dates, choose your test brand, and see the estimated percent accuracy for detecting pregnancy on each day. Pregnancy Test Accuracy Calculator Estimate your test’s ability to detect pregnancy based on when you test and the test type. Enter DPO Use LMP + Cycle Days Past Ovulation (DPO) Select DPO…7 DPO8 … Read more
Enter your due date or an early-ultrasound date. We’ll estimate your conception date, most-likely intercourse day, a fertile window, and your LMP. Reverse Due Date Calculator Due Date Ultrasound Estimated due date (EDD) Pregnancy length (from LMP) weeksdays If unsure, leave at 40 weeks. Ultrasound date Gestational age at ultrasound Weeks Days (0–6) Pregnancy length … Read more