Fitness
Use OmniCalc's pregnancy calculator to estimate how far along a pregnancy is and how much time remains until the due date.
Pregnancy calculator
Use either last menstrual period or a known due date to estimate how far along a pregnancy is, the current trimester, milestone timing, and days remaining.
Why this result matters
A pregnancy progress tracker focused on how far along the pregnancy is, trimester, due date progress, milestone timing, and days remaining rather than only estimating the due date itself. Use the tool above to enter a few clear inputs and get a practical answer you can use right away.
This pregnancy calculator helps users estimate weeks pregnant, trimester, due date progress, and key milestone timing from either a last menstrual period or a known due date. It stays distinct from a simpler due date calculator by centering the ongoing progress question: how far along am I right now?
Formula and method
The calculator uses a standard 280-day gestational timeline. If LMP is used, due date is estimated by adding 280 days. If a known due date is used, gestational start is estimated by subtracting 280 days, then progress and trimester are measured against the selected as-of date.
Example
If someone knows either the last menstrual period or a clinician-confirmed due date, the calculator can estimate how many weeks pregnant they are and how much of the pregnancy timeline has elapsed.
FAQ
Short answers to the questions people often ask before or after using the tool.
Question
The due date calculator centers the end-date estimate itself. This pregnancy calculator centers progress tracking: how far along the pregnancy is, which trimester it is in, and how much time remains.
Question
If you already have a clinician-confirmed due date, that can be more useful for progress tracking. If not, LMP provides a standard starting estimate.
Question
No. It is a planning tool and should not replace ultrasound-based dating or clinician advice.
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