Pregnancy
Days remaining
Days left of the standard term, clamped at zero once the term has passed.
The Formula
remaining = 280 - days
Days left of the standard term, clamped at zero once the term has passed.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| r | Days remaining | count | Days left of the term. |
| d | Days | count | Days since the last menstrual period. |
What Each Symbol Means
rcount
Days remaining
Days left of the term.
dcount
Days
Days since the last menstrual period.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate how many weeks pregnant page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate How Many Weeks Pregnant, filed under Health. Every number the guide produces comes from substituting into this one line.