Your Complete Pregnancy Companion
Free, accurate pregnancy tools built on evidence-based medical guidelines. From calculating your due date to tracking your baby's growth — everything in one place.
6
Free Tools
40
Weeks of Content
100%
Private
Free Pregnancy Tools & Calculators
EDD Calculator
Estimated Due Date Calculator
Calculate your estimated due date using LMP, conception date, IVF transfer, or ultrasound. Includes trimester timeline and baby milestones.
Pregnancy Week by Week
All 40 weeks of development
Follow your baby's growth and your body's changes from conception to birth — with expert tips, symptoms, and milestone guidance for every week.
Ovulation Calculator
Fertile Window & Cycle Tracker
Discover your most fertile days and peak ovulation date. Visualize your full cycle calendar to maximize your chances of conception.
Weight Gain Calculator
ACOG-Based Recommendations
Get personalized pregnancy weight gain targets based on your pre-pregnancy BMI. Track your progress against clinical guidelines week by week.
Prenatal Nutrition Guide
Key Nutrients, Foods & Safety
Explore all 12 essential pregnancy nutrients with RDAs, food sources, and trimester tips. Includes a complete foods-to-avoid guide based on ACOG, NIH, CDC, and FDA guidance.
Hospital Bag Checklist
What to Pack for Labor
Interactive checklist for mom, baby, and your birth partner. Based on clinical guidance — checks off what you need and saves your progress automatically.
PregaMom
PregaMom began as a set of free pregnancy calculators, but that was never the whole point. Behind every due date estimate and week-by-week milestone is a simple belief: pregnancy is one of the most emotional, uncertain, and beautiful journeys a person can go through, and every expecting mother deserves a companion who walks beside her through all of it — not just a tool she visits once.
Why We Started PregaMom
PregaMom was born on 10th May 2026 — the eve of Mother's Day — out of a simple observation: pregnancy information online is often scattered or clinical at exactly the moment a woman needs warmth and clarity most. We wanted to translate evidence-based guidance from organizations like ACOG, the CDC, and the WHO into clear, encouraging, judgment-free language — built by people who understand that behind every calculation is a real person navigating one of the biggest moments of her life.
Growing Beyond Tools
Calculators are where PregaMom started, but not where it ends. Our long-term vision is to grow into a complete companion for the entire reproductive journey — from trying to conceive, through every trimester, into birth preparation and beyond — supporting not just the medical milestones but the emotional ones too, always kept free, private, and evidence-based.
Whatever stage of the journey you are in, PregaMom is here to walk alongside you. Explore our free tools above, or read more on our About page.
Understanding Your Pregnancy: Due Dates, Trimesters & Fertility
Whether you just found out you're expecting or you're still planning ahead, understanding how pregnancy is dated and tracked can make the months ahead feel far less uncertain. PregaMom's free pregnancy calculators are built around the same clinical formulas used by OB-GYNs and midwives, so you can estimate your due date, track your fertile window, monitor healthy weight gain, and follow your baby's development week by week — all without creating an account or sharing your personal data.
How Is a Pregnancy Due Date Calculated?
Your estimated due date (EDD) isn't a guarantee — it's a statistical estimate based on a well-established clinical formula. The most common method, known as Naegele's Rule, adds 280 days (40 weeks) to the first day of your last menstrual period (LMP), assuming a typical 28-day cycle, with an adjustment for cycles that run longer or shorter. Your due date can also be calculated from a known conception date, an early ultrasound measurement, or, for IVF pregnancies, the exact embryo transfer date, which removes much of the guesswork around ovulation timing. Our due date calculator supports all five of these methods. It's worth keeping in mind that only about 5% of babies are born on their exact due date — arriving anywhere within two weeks before or after is considered completely normal.
The Three Trimesters of Pregnancy
A full-term pregnancy spans roughly 40 weeks, divided into three trimesters, each marked by distinct developmental milestones. The first trimester (weeks 1–13) covers the earliest and most rapid development — by week 8, all of the baby's major organs have begun forming, marking the shift from embryo to fetus. The second trimester (weeks 14–26) is often called the "golden trimester," since early symptoms like nausea typically ease and energy tends to return. The third trimester (weeks 27–40) is the final stretch of growth, when the baby gains most of its birth weight and the lungs and brain continue maturing right up until delivery. Our pregnancy week-by-week guide breaks down exactly what to expect in your body and your baby during each of these 40 weeks.
Tracking Ovulation and Your Fertile Window
For those trying to conceive, timing matters. Ovulation typically occurs about 14 days before the start of the next period, and the fertile window — the days when conception is possible — spans roughly seven days: the five days leading up to ovulation, ovulation day itself, and the day after. This window accounts for the fact that sperm can survive in the reproductive tract for several days, while the egg remains viable for only about 12 to 24 hours after release. Our ovulation calculator uses your last period date and average cycle length to estimate this window along with your most likely ovulation date.
Weight Gain and Nutrition Guidelines
Healthy weight gain during pregnancy depends largely on pre-pregnancy body mass index (BMI). Based on ACOG and CDC guidelines, women with a normal BMI (18.5–24.9) are generally advised to gain 25–35 lbs over the course of pregnancy, while those who are underweight are advised to gain more (28–40 lbs), and those who are overweight or obese are advised to gain less (15–25 lbs and 11–20 lbs, respectively) — always under the guidance of a healthcare provider. Nutritional needs shift too: increased folate, iron, calcium, and DHA all become essential for healthy fetal development. Our prenatal nutrition guide and pregnancy weight gain calculator translate these clinical recommendations into practical, personalized targets.
Every calculator on PregaMom runs entirely in your browser, with no sign-up and no data ever leaving your device — because accurate, judgment-free pregnancy information should be free and accessible to every expecting parent. Start with our due date calculator, or explore any of the tools above to begin planning your own pregnancy timeline.
Want to Learn More? Check These Trusted Sources