Pregnancy & PediatricsFree Tool

Fundal Height Calculator

Provided byOmni Calculatoromnicalculator.com

The fundal height calculator allows you to calculate gestational age, birth weight and assess the development of your...

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About this tool

What Fundal Height Calculator does

The Fundal Height Calculator on Omni Calculator estimates gestational age, birth weight, and fetal development by accepting a fundal height measurement in centimeters. It outputs the gestational age in weeks and days, compares the measurement against standard percentiles (3rd to 97th), and provides birth weight calculations based on pregnancy charts. The tool is designed for quick reference during pregnancy, offering a simple interface for inputting measurements and viewing percentile rankings alongside expected values for the given gestational age.

Step by step

How to use the Omni Calculator Fundal Height Calculator

  1. 1

    Open the Fundal Height Calculator on Omni Calculator

  2. 2

    Enter the measured fundal height in centimeters using a tape measure from the top of the uterus to the pubic symphysis

  3. 3

    View the calculated gestational age in weeks and days, along with percentile rankings and birth weight estimates

  4. 4

    Review the comparison of measured versus expected fundal height and the provided standard deviation values

Is it right for you

Best for

Pregnant individuals and healthcare providers seeking a quick, informal estimate of gestational age and fetal growth based on fundal height measurements, useful for tracking development between clinical visits.

Limitations

  • Results are estimates based on standard charts and not a substitute for professional medical assessment
  • Relies on accurate self-measurement of fundal height, which can vary by technique and operator
  • Does not account for individual anatomical variations or multiple pregnancies
Questions

Fundal Height Calculator FAQ

How accurate is the fundal height calculator compared to an ultrasound?
The calculator provides estimates based on standardized percentiles and may differ from ultrasound measurements; it is intended for general tracking and should not replace clinical evaluation by a healthcare provider.
What is the typical fundal height measurement at 20 weeks of pregnancy?
At approximately 20 weeks, the fundal height in centimeters often corresponds closely to the gestational age in weeks, typically ranging between 18 and 22 cm, though individual variation is common.
Can I use this calculator if I am carrying twins or have a high‑BMI pregnancy?
The tool is designed for singleton pregnancies and may not accurately reflect fundal height in multiple gestations or high‑BMI individuals; consult your doctor for personalized assessment in these cases.
What does the standard deviation (SD) value mean in the results?
The standard deviation shows how far the measured fundal height deviates from the expected average for that gestational age; a higher absolute SD indicates a larger difference from the median percentile.
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