Built for Every Expecting Mother, Everywhere in the World
Pregnancylogics exists to educate, support, and spread awareness for expecting mothers around the world with free, science-backed tools that make the most important journey of your life a little clearer.
20+
Free Tools
6
Languages
100%
Free Forever
40+
Countries Reached
Born from a belief that every expecting parent deserves better
Pregnancylogics was founded by a proud brother of a recently pregnant sister at the time, with a small, passionate team of parents, developers, and health enthusiasts who experienced firsthand how confusing and fragmented pregnancy information can be. Scattered across unreliable websites, buried in medical jargon, or locked behind expensive apps, the tools that expecting mothers need most were not accessible enough.
We set out to change that. We built Pregnancylogics as a single, trusted destination where any expecting mother, regardless of where she lives, what language she speaks, or what her budget is, can access accurate, science-backed pregnancy tools completely free.
From calculating your due date to tracking your baby's growth, building your hospital bag checklist to understanding your fertility window, every feature is designed with care, backed by clinical guidelines, and built to work beautifully on any device, anywhere in the world.
Today, Pregnancylogics serves expecting mothers across 40+ countries in 6 languages and we're just getting started.
"Every kick is a reminder of why we built this."
We believe the journey to motherhood should be filled with clarity, confidence, and community, not confusion. That's why we built Pregnancylogics.
Our Mission, Vision & Pledge
Three commitments that guide every decision we make at Pregnancylogics.
To educate, support, and spread awareness for expecting mothers around the world
Our mission is to translate the complex science of pregnancy, fertility windows, gestational timelines, fetal development milestones, and nutritional needs into clear, actionable insights that any expecting mother can understand and act on in seconds. We do this not for profit, but because we believe informed mothers make healthier decisions for themselves and their babies.
Educate
Science-backed content in plain language
Support
Tools for every stage of pregnancy
Awareness
Reaching mothers in 40+ countries
A world where every expecting mother has the tools she needs free, forever.
We envision a global platform where pregnancy guidance, planning tools, and health calculators are universally accessible regardless of location, language, or income. No paywalls. No gatekeeping. Just the information every mother deserves.
✦ We are building toward a future where Pregnancylogics is the most trusted pregnancy resource for mothers in every country, in every language.
Free tools, always. Advanced features, sustainably.
Every calculator, checklist, and planner on Pregnancylogics is and will always be completely free. No credit card. No trial. No catch. We make this pledge to every expecting mother who visits our site.
The personalised dashboard with advanced tracking features is currently free for all users. In the future, a small, transparent fee may be introduced to sustain and grow this service so we can keep improving it for millions of families worldwide. But the core tools? Free. Forever.
All Calculators
Free forever
Dashboard
Free now
Community
Always open
All Languages
6 languages
Privacy
No data selling
Support
Always here
Our Core Values
Six principles that shape every tool, every article, and every decision we make.
Always Reliable
Our tools are built to be accurate, consistent, and available whenever you need them.
Science-Backed
Every calculator is built on peer-reviewed clinical guidelines and medical standards.
Globally Inclusive
Available in 6 languages, designed for expecting mothers in every corner of the world.
Community Driven
Built by parents, for parents — with real feedback from real families.
Education First
We do not just give numbers — we explain the science so you truly understand your journey.
No Paywalls
Every tool, every calculator, every checklist — free. No subscriptions, no credit cards.
The Science Behind Our Calculators
Every tool on Pregnancylogics is built on established medical science and peer-reviewed clinical guidelines. We believe transparency builds trust, so here's exactly how each calculator works and which scientific theories it's based on.
Important Disclaimer
Pregnancylogics tools are designed for educational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider or OB-GYN for personalised medical guidance. Our calculators use general clinical guidelines and may not account for individual health conditions.
Due Date Calculator
Naegele's Rule & Gestational AgeOur due date calculator applies Naegele's rule (LMP + 280 days) and adjusts for cycle differences when needed.
Uses first day of LMP
Adds 280 days (40 weeks)
Adjusts for cycle length differences
Supports IVF transfer date offsets
Ovulation Calculator
Luteal Phase Constant & Cycle VariabilityOvulation is typically estimated around 14 days before the next period. We combine this principle with cycle length to estimate fertile days.
Estimates ovulation from next expected period
Calculates fertile window around ovulation
Adapts to your average cycle length
Highlights likely peak fertility days
Fertility Window Calculator
Sperm Viability & Egg LifespanThe fertile window is based on sperm survival (up to 5 days) plus egg viability (about 24 hours).
Finds likely ovulation day
Adds 5 pre-ovulation fertile days
Marks ovulation-day peak
Shows easy-to-read probability windows
Pregnancy Weight Gain Calculator
IOM BMI-Based GuidanceWeight gain recommendations differ by pre-pregnancy BMI. We use IOM guideline ranges by trimester and total gain targets.
Calculates pre-pregnancy BMI
Applies trimester targets by BMI
Compares your gain with guideline range
Flags patterns to discuss with provider
IVF Due Date Calculator
Embryo Age Offset MethodFor IVF, transfer date and embryo age allow more precise equivalent gestational dating than LMP-only estimation.
Uses embryo transfer date
Applies day-3/day-5 embryo offsets
Computes equivalent gestational timeline
Shows week-by-week milestones
Twin Pregnancy Calculator
Multiple Gestation TimelineTwin pregnancies often follow different monitoring and delivery timelines than singleton pregnancies.
Applies twin-specific timeline assumptions
Highlights key twin monitoring windows
Adjusts milestone expectations
Supports chorionicity-aware planning
Period Cycle Calculator
Menstrual Phase ModelingCycle prediction maps menstrual, follicular, ovulatory, and luteal phases from your cycle pattern.
Predicts next period dates
Estimates ovulation per cycle
Shows fertile and PMS windows
Supports multi-cycle planning
Baby Growth Tracker
WHO Child Growth StandardsTracks weight/height/head circumference against WHO growth references and trajectory trends.
Plots key growth metrics
Shows relative percentile position
Tracks velocity trend over time
Supports corrected-age context when needed
For every mother who deserves to feel informed, supported, and celebrated
Pregnancy is one of the most profound experiences a human being can go through. It is filled with joy, wonder, anxiety, and countless questions. We built Pregnancylogics because we believe every expecting mother, whether she's in New York or Nairobi, London or Lagos, deserves access to the same quality of information and tools.
We Educate
Because knowledge reduces fear and empowers better decisions. We translate complex medical science into clear, actionable insights every mother can understand.
We Support
Because no mother should feel alone on this journey. Every tool, checklist, and calculator is designed to be a trusted companion through every stage of pregnancy.
We Spread Awareness
Because maternal health is a global issue that deserves global attention. We reach mothers across 40+ countries, in 6 languages, breaking barriers to quality pregnancy care.
Pregnancylogics is not just a website. It is a commitment, to every expecting mother around the world, that we will always be here, always be free, and always be on your side.
Join millions of expecting mothers worldwide
Free tools. Science-backed. Built with love — for every mother, everywhere.