how many weeks pregnant am i today
The question "how many weeks pregnant am I today" has a purely arithmetic answer: take the complete days since the first day of the last menstrual period, divide by 7, and the remainder becomes the extra days. This page walks through that division step by step and explains why the count already marks weeks before any conception has taken place.
Integer division of 46 by 7 gives 6, with a remainder of 4: those are the extra days shown under the week count. Since the total is under 98 days, the trimester shown is the first.
At day 97 the result is still 1st trimester; a single day later, at day 98, the same division by 7 yields exactly 14 weeks and 0 days and the trimester changes. The cutoff sits on the day count, not on a calendar date.
13 days remain to complete the 280 days of Naegele's Rule. The same remainder arithmetic that classified the earlier examples still holds at the end: 267 divided by 7 gives 38, with a remainder of 1.
The gestational count starts at the LMP by universal medical convention, because the exact date of ovulation and fertilization is rarely known precisely. This means that in the first two gestational weeks, pregnancy has not yet occurred biologically, ovulation and fertilization typically happen in weeks 2–3.
Because the starting point is the LMP, not fertilization. Medical convention assumes ovulation around day 14 of the cycle, so gestational weeks 1 and 2 cover the interval between the period and the likely conception, a stretch when pregnancy has not biologically started yet.
Yes. The field accepts dates up to 294 days in the past, equivalent to 42 complete weeks. An older LMP is rejected as invalid, because it exceeds even the post-term window the calculator itself recognizes.
Structurally nothing: they are just the remainder of the division by 7. "0 days" is the first day of that week and "6 days" is the last one before the week count rises by one. The two ends represent calendar dates up to 6 days apart within the same displayed week.
Medical notice: this calculation is educational, based on population-level averages, and does not replace prenatal care, ultrasound, diagnosis or guidance from a doctor or obstetrician.
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