Uterine Height Calculator

Estimate expected fundal height range from gestational weeks using the common weeks ± 2 cm screening rule.

1.0M uses Updated · 2026-05-25 Runs locally · zero upload
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How to Use Uterine Height Calculator

The Uterine Height Calculator estimates the expected fundal-height range from gestational weeks. Enter weeks of pregnancy and the result shows roughly weeks minus 2 to weeks plus 2 centimeters.

It is most relevant during the mid-to-late pregnancy screening window. Very early gestation, term pregnancy, twins, abnormal fluid, fetal position and body habitus can weaken the relationship.

Formula & Theory - Uterine Height Calculator

A common clinical rule is that from about 20 to 36 weeks, fundal height in centimeters roughly tracks gestational age in weeks, with about a 2 cm allowance.

The formula is simple, but interpretation is not. A single off-range measurement is less informative than trend, technique and ultrasound context.

Expected fundal height range (cm) = gestational age in weeks ± 2 cm

Use Cases for Uterine Height Calculator

Use it in pregnancy education, prenatal-record explainers, gestational-age tool sets and mobile health widgets. It helps users interpret a chart entry such as fundal height 30 cm.

Frequently asked questions about Uterine Height Calculator

When is the rule most useful?

It is most useful in the mid-to-late pregnancy screening window, especially around 20-36 weeks.

Does Uterine Height Calculator work offline after the page loads?

The calculation logic runs in the browser, so no server is needed for the calculation after the page loads.

Is my data stored?

No. The page does not send your inputs to a server.