Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Health, Fitness & Wellness
How Many Weeks Pregnant Am I? Calculator
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Inputs
0280
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: Pregnancy week = 7.0 weeks. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
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Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Days since LMP
The “Days since LMP” value used in this tool’s formula. Adjust it to see results update live.
Gestational weeks = days since LMP ÷ 7.
Convert days since LMP into pregnancy week and trimester. Estimates only—not a diagnosis or prescription.
How this calculator works
Convert days since LMP into pregnancy week and trimester. Estimates only—not a diagnosis or prescription. Gestational weeks = days since LMP ÷ 7. Scenario: 49 days since LMP → 7.0 weeks, first trimester.
Gestational weeks = days since LMP ÷ 7.
Scenario: 49 days since LMP → 7.0 weeks, first trimester.
When to use this Pregnancy Week
Common use cases
- Convert days since LMP into pregnancy week and trimester.
- Sanity-check with this scenario: 49 days since LMP → 7.0 weeks, first trimester.
- The relationship is: Gestational weeks = days since LMP ÷ 7.
Localized examples
- Health, Fitness & Wellness: the example on this page uses the same formula as the widget.
What you get
- Fields: Days since LMP
- Gestational weeks = days since LMP ÷ 7.
- Scenario on the page: 49 days since LMP → 7.0 weeks, first trimester.
How to Calculate Pregnancy Week
- 1Enter Days since LMP. Use the values you have, not a catalog average, unless that is all you know.
- 2Gestational weeks = days since LMP ÷ 7.
- 3Scenario: 49 days since LMP → 7.0 weeks, first trimester.
- 4If this number would change a drug, a diet, or a return-to-play call, take it to a clinician. The page never examined you.
Governing formula
Gestational weeks = days since LMP ÷ 7.
49 days since LMP → 7.0 weeks, first trimester.
49 days since LMP → 7.0 weeks, first trimester.
Variable definitions
- daysSinceLmp
Days since LMP
The “Days since LMP” field. Default 49; typical range 0–280.
- The formula (Gestational weeks = days since LMP ÷ 7.) does not see labs, medications, sleep, or injury history. A clinician does.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Gestational weeks = days since LMP ÷ 7.
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Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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