Fundal Height Calculator
Monitor fetal growth and development during pregnancy
Calculate Fundal Height
Results
Assessment: Normal
24.0 weeksNormal fetal growth
Medical Disclaimer
This calculator provides estimates based on population averages. Individual variation is normal. Fundal height measurements should always be interpreted by qualified healthcare providers in conjunction with other clinical assessments. Significant deviations require medical evaluation.
How to Measure
Empty bladder before measuring
Lie flat on back with knees slightly bent
Use measuring tape from pubic bone to top of uterus
Measure along the midline of abdomen
Record measurement to nearest 0.5 cm
Weekly Reference
Reference for 24 Weeks
Expected Position
Above belly button
Normal Range
21.8 - 25.8 cm
Fundal Height Percentile Chart
| Week | 3rd % | 5th % | 10th % | 50th % | 90th % | 95th % | 97th % |
|---|---|---|---|---|---|---|---|
| 16 | 13.2 | 13.5 | 14.0 | 15.8 | 17.6 | 18.1 | 18.5 |
| 18 | 15.0 | 15.4 | 15.9 | 17.8 | 19.6 | 20.2 | 20.5 |
| 20 | 16.9 | 17.3 | 17.8 | 19.8 | 21.7 | 22.2 | 22.6 |
| 22 | 18.8 | 19.2 | 19.8 | 21.8 | 23.8 | 24.3 | 24.7 |
| 24 | 20.7 | 21.1 | 21.7 | 23.8 | 25.8 | 26.4 | 26.8 |
| 26 | 22.6 | 23.0 | 23.6 | 25.7 | 27.9 | 28.5 | 28.9 |
| 28 | 24.5 | 24.9 | 25.5 | 27.7 | 29.9 | 30.5 | 30.9 |
| 30 | 26.3 | 26.7 | 27.3 | 29.6 | 31.8 | 32.5 | 32.9 |
| 32 | 28.0 | 28.4 | 29.1 | 31.4 | 33.8 | 34.4 | 34.8 |
| 34 | 29.7 | 30.1 | 30.8 | 33.2 | 35.6 | 36.3 | 36.7 |
| 36 | 31.3 | 31.7 | 32.4 | 34.9 | 37.3 | 38.0 | 38.5 |
| 38 | 32.8 | 33.2 | 33.9 | 36.5 | 39.0 | 39.7 | 40.2 |
| 40 | 34.1 | 34.6 | 35.4 | 38.0 | 40.5 | 41.3 | 41.8 |
* Values shown in centimeters. Chart based on INTERGROWTH-21st standards.
Understanding Fundal Height
What is Fundal Height?
Fundal height is the distance measured from the top of the pubic bone to the top of the uterus (fundus). It's a simple, non-invasive way to monitor fetal growth and development during pregnancy.
Clinical Significance:
- • Monitors fetal growth progression
- • Screens for growth abnormalities
- • Estimates gestational age
- • Detects multiple pregnancies
- • Identifies polyhydramnios/oligohydramnios
When to Measure
Fundal height measurements typically begin around 12-14 weeks of pregnancy when the uterus becomes palpable above the pubic bone. Measurements continue throughout pregnancy at each prenatal visit.
Factors Affecting Accuracy:
- • Maternal obesity or body habitus
- • Fetal position and presentation
- • Amniotic fluid volume
- • Multiple pregnancies
- • Uterine fibroids
- • Maternal bladder fullness
Clinical Guidelines
Normal Findings
- • Fundal height in cm ≈ gestational age in weeks (±2-3 cm)
- • Steady, consistent growth pattern
- • 10th-90th percentile range
- • Appropriate for gestational age
Concerning Findings
- • <3rd percentile (growth restriction)
- • >97th percentile (macrosomia)
- • Plateau or decrease in measurements
- • >3 cm discrepancy from expected