Becoming pregnant is one of life’s most exciting journeys — but it’s also a time full of questions. How far along am I? When is my baby due? What’s my fertile window?
Our free online pregnancy calculators give you accurate, instant answers so you can plan confidently. In this guide, you’ll discover how each tool works, why it’s important, and how to make the most of it for a healthy and well-prepared pregnancy.
One of the most exciting dates during pregnancy is your due date. Our Pregnancy Due Date Calculator estimates your baby’s arrival based on:
Last Menstrual Period (LMP)
Conception date
Ultrasound measurements
Why it’s important:
Knowing your due date helps schedule medical appointments, prepare your home, and plan for maternity leave.
Medical Tip: Only 4% of babies are born exactly on their due date — but it’s still a crucial guide for your pregnancy care.
If you’re trying to conceive, knowing your fertile window is key. Our Advanced Ovulation Calculator predicts:
Your most fertile days in the month
Your estimated ovulation date
The date of your next period
Why it’s important:
Timing intercourse during your fertile window increases the chances of conception.
Medical Tip: The fertile window typically spans 6 days — the 5 days before ovulation and the day of ovulation itself.
If you want to know when your pregnancy began, our Conception Date Calculator can help.
What this tool tells you:
Likely conception date
Estimated ovulation date
Baby’s probable due date
Why it’s important:
It’s useful for early pregnancy planning, personal records, or paternity clarification.
Your pregnancy is divided into three trimesters, each with unique milestones for both you and your baby.
What this tool tells you:
Current trimester
Weeks of pregnancy
Estimated due date
Why it’s important:
Knowing your trimester helps you schedule important medical tests, track fetal growth, and adjust your lifestyle for each stage of pregnancy.
Our tools use standard medical formulas and guidelines:
Naegele’s Rule to estimate due dates from LMP
Gestational age counting starting from the first day of your last period
Ovulation prediction based on luteal phase length and cycle duration
Adjustments for irregular cycles if data is available
Medical Tip: While LMP is the most common method, conception date (if known) may provide a more precise estimate.
These calculators are for educational purposes only. Always consult a qualified healthcare provider for personalized medical advice.