Tracking your pregnancy and estimating your due date is important for every mom-to-be and her family.
The LMP (Last Menstrual Period) Calculator is an online tool that estimates how far along your pregnancy is and when you might deliver, based on the date of your last menstrual period.
What is LMP?
LMP stands for Last Menstrual Period — the first day of your menstrual period.
Doctors usually start pregnancy calculations from this date, as this is the most reliable starting point for most women.
How does the LMP Calculator work?
Input:
You enter the first date of your last menstrual period into the tool.
Sometimes the tool also asks you for the average length of your menstrual cycle (such as 28 days).
Calculation:
The tool adds the average gestational age of 280 days (40 weeks) to the date you provide.
This calculation gives your estimated due date (EDD) and current week.
Output:
The current week and day of your pregnancy.
Estimated delivery date.
Sometimes also shows the trimester of pregnancy (First, Second, Third Trimester).
How accurate is this estimate?
This is a mathematical estimate, not a medical test.
The actual delivery date depends on your body, baby’s development and other medical factors.
Still, this tool gives a good initial estimate, so that you can do checkups and preparations at the right time.
Benefits of LMP Calculator
Easy and fast – just enter the date, get the result immediately.
Free and online – can be used from anywhere.
Preparing for a doctor visit — can provide accurate information at the next appointment.
Tracking the pregnancy journey — easy to understand changes week by week.
Tips for using LMP Calculator
Always enter your correct LMP date, if you don’t remember, check your calendar to confirm.
If your menstrual cycle length is different from 28 days, enter the correct average length.
Remember: this is just an estimate — consult a doctor before making any medical decisions.
Conclusion:
LMP Calculator is a simple, but useful tool that helps the mother-to-be and her family understand the pregnancy journey. It is not a substitute for a doctor’s advice, but a guide that can help you better prepare for your baby’s arrival.