All Pregnancy Calculators 🧮
Every free calculator in one place — due dates, IVF & fertility, pregnancy health, and animal pregnancies. Pick a category or search to find the right tool.
Due Date Calculators
Find your baby's due date from your LMP, conception, ultrasound, or IVF transfer date.
Due Date Calculator
Calculate your due date from your last menstrual period with Naegele's Rule.
LMP Due Date Calculator
Due date from the first day of your last menstrual period.
Last Menstrual Period Calculator
LMP-based due date calculator with cycle-length adjustment.
Conception Date Calculator
Due date from your estimated or known conception date.
Ultrasound Due Date Calculator
Due date from ultrasound measurements (CRL, BPD, FL).
Reverse Due Date Calculator
Work backwards: find conception and LMP from a known due date.
Ovulation Due Date Calculator
Due date from your ovulation date.
Week-by-Week Due Date Calculator
See your due date plus a full week-by-week pregnancy breakdown.
Implantation Date Calculator
Estimate when implantation occurred from ovulation or transfer.
IVF & Fertility
Dating tools for IVF, FET, IUI, implantation, and fertility planning.
IVF Due Date Calculator
Due date from your IVF embryo transfer date (Day 3 or Day 5).
FET Due Date Calculator
Due date from a frozen embryo transfer date.
FET vs Fresh Transfer
Compare frozen vs fresh embryo transfer dates and outcomes.
IUI Due Date Calculator
Due date from your intrauterine insemination date.
Implantation vs Period Calculator
Is it implantation bleeding or your period? Compare the dates.
IVF Pregnancy Timeline
Full IVF timeline: retrieval, transfer, beta test, and milestones.
Chinese Calendar Due Date Calculator
Due date using the traditional Chinese pregnancy calendar.
Pregnancy Health
Weight gain, hCG levels, test lines, pregnancy chances, and risk estimators.
hCG Level Checker
Check if your hCG levels are doubling normally in early pregnancy.
Pregnancy Test Line Progression
Track whether your test lines are darkening as expected.
Pregnancy Weight Gain Calculator
Healthy weight-gain range based on your pre-pregnancy BMI (IOM guidelines).
Twin Pregnancy Weight Gain Calculator
Weight-gain targets for twin pregnancies by BMI category.
Pregnancy Chance Calculator
Estimate your chance of conception per cycle by age and timing.
Plan B Calculator
How effective is Plan B based on when you take it?
Miscarriage Risk Calculator
Understand miscarriage risk by week and maternal age (statistics-based).
Twins Chance Calculator
Your odds of having twins based on age, family history, and fertility treatment.
Baby Eye Color Calculator
Predict your baby's likely eye color from parents' eye colors.
Animal Pregnancy
Due date calculators for dogs, cats, horses, cattle, and goats.
Dog Pregnancy Due Date Calculator
Whelping date from breeding date (63 days average gestation).
Cat Pregnancy Due Date Calculator
Queening date from breeding date (65 days average gestation).
Horse Pregnancy Due Date Calculator
Foaling date from breeding date (340 days average gestation).
Cattle Pregnancy Due Date Calculator
Calving date from breeding date (283 days average gestation).
Goat Pregnancy Due Date Calculator
Kidding date from breeding date (150 days average gestation).
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