General calculators
Pregnancy Due Date Calculator
Estimate your baby’s arrival from LMP or ultrasound.
Ovulation Calculator
Find your most fertile days and ovulation date.
Implantation Calculator
Estimate your implantation window and best day to test.
Twin & Triplet Due Date
EDD plus typical delivery windows for multiples.
IVF/FET Due Date
EDD from transfer date (Day 3/5/6) + GA today.
Ultrasound Due Date
EDD from scan date and gestational age at ultrasound.
Pregnancy Chance Calendar
See your daily conception odds across the cycle.
Advanced Pregnancy Chance
Refine your estimate with age, BMI, and other factors.
One-Time Pregnancy Chance
Estimate odds from a single encounter.
Fertility by Age
How age affects natural fertility rates.
Miscarriage Risk
Data-based estimate of miscarriage risk.
Pregnancy Test Accuracy
Estimate accuracy by DPO and brand.
hCG Levels & Doubling Time
Doubling/halving time, typical range, and projection.
Conception Date
Find conception from LMP, EDD, or ultrasound.
Reverse Due Date
Work backward from EDD to estimate conception.
Due Date by Intercourse Date
EDD, birth-probability calendar, progress, fetal size.
Fertility Calculator
All-in-one calculator.
Am I Pregnant? Calculator
Likelihood band for this cycle and next test day.
Morning-After Pill Effectiveness
Effectiveness vs hours since sex, with BMI context.
Missed Pill Risk
Risk after a late or missed pill, with EC guidance.
Contraceptive Risk
Advanced per-act risk with lifestyle modifiers.
Combine Methods
Estimate combined per-act risk for two methods.
After Unprotected Intercourse
Incident risk, EC timing, and first accurate test day.
Pregnancy Chance (simple)
Quick per-act estimate from age and method.
Implantation Bleeding
Implantation vs period likelihood and when to retest.
Chance of Twins
Baseline twin risk with DZ/MZ split and scenarios.
Late Period Probability
Pregnancy likelihood vs late cycle with retest timing.
OPK to Ovulation Timing
Estimate ovulation after your first positive OPK.
LAM Eligibility and Risk
Meets LAM today, effectiveness, and when to switch.
Period Calculator
Predict your next period window and cycle day.
Time to Get Pregnant
Per cycle and cumulative odds with when to seek help.
Egg Freezing Success Rate
Chance of at least one live birth from your frozen eggs.
Return to Fertility: Depo
Timeline to ovulation and first period after Depo.
Method-specific & niche
IUD Pregnancy Risk
Per-act risk, strings check, and EC timing guidance.
IUI Success Rate
Per-cycle and cumulative odds across attempts one to three.
Clomid or Letrozole Ovulation Day
Ovulation window from dose and last pill date.
Tubal Ligation Failure Risk
Annual and cumulative risk with what to do next.
Vasectomy Failure Risk
Annual and cumulative risk plus PVSA context.
The Pill Pregnancy Risk
Pill type, adherence, and timing vs fertile window.
Condom Pregnancy Risk
Typical vs perfect use, breakage or slippage.
Withdrawal (Pull-Out) Risk
Per-act risk with EC timing guidance.
PCOS Ovulation Calculator
PCOS aware ovulation window and next two best days.
Sperm Morphology Lookup
Morphology classification and plain language result.
Why Use Our Pregnancy Calculator?
- Science-Backed: All calculators are grounded in peer-reviewed research to ensure accuracy.
- Personalized Insights: Get results tailored to your unique circumstances.
- User-Friendly: Easy-to-use tools accessible on any device.
- Privacy Focused: Your data is confidential and securely handled.
Frequently Asked Questions
Q: Is the pregnancy calculator free to use?
A: Yes, both the Pregnancy Chance Calculator and Pregnancy Risk Calculator are free. The Personalized Pregnancy Chance Analysis is a premium service available for purchase.
Q: How accurate are the results?
A: Our calculators use the latest scientific data to provide accurate estimates. However, individual results may vary. For medical advice, please consult a healthcare professional.
Q: Is my personal information safe?
A: Absolutely. We prioritize your privacy and adhere to strict data protection protocols.