Pregnancy Dating Calculators

The “International Gestational Age Assessment” Calculator is an Excel-based application.

This is a beta version calculator for gestational age based on fetal measurements (crown-rump length; or head circumference and femur length).

Centiles and z-scores of large datasets can also be calculated.

The “International Fetal Size in Early Pregnancy” Calculator is an Excel-based application.

This is a beta version calculator to estimate fetal size between 8+2 and 15+0 weeks’ gestation based on gestational age and crown-rump length measurement.

Centiles and z-scores of large datasets can also be calculated.

The “Estimated Fetal Weight" Calculator is an Excel-based application.

It produces centiles and z-scores for these measurements based on the INTERGROWTH-21st Estimated Fetal Weight Standards.

Centiles and z-scores of large datasets can also be calculated.

The "International Symphysis-Fundal Height" Calculator is an Excel-based application.

It produces centiles and z-scores for these measurements based on the INTERGROWTH-21st Symphysis-Fundal Height Standards.

Centiles and z-scores of large datasets can also be calculated.

The “International Gestational Weight Gain” Calculator is an Excel-based application.

This calculator produces centiles and z-scores for gestational weight gain based on the
INTERGROWTH-21st Standards.

Centiles and z-scores of large datasets can also be calculated.

These applications allows data to be entered manually so that the size of individuals can be compared to, and plotted graphically against, the international standards. In addition, large datasets can be imported directly into the application, which then calculates the respective centiles and z-scores based on the INTERGROWTH-21st Standards. The results can be exported for further analysis.

Head circumference, bi-parietal diameter, abdominal circumference, femur length and occipito-frontal diameter for fetuses between 14+0 and 40+0 weeks' gestation.    

Language options available: English, Portuguese, Spanish, French, Italian, Russian and Arabic.

This application allows data to be entered manually so that the size of individuals can be compared to, and plotted graphically against, the international standards and references. In addition, large datasets can be imported directly into the application, which then calculates the respective centiles and z-scores based on the INTERGROWTH-21st Standards and References. The results can be exported for further analysis.

Weight, length, and head circumference for newborns between 24+0 to 42+6 weeks’ gestation.

Language options available: English, Portuguese, Spanish, French, Italian, Russian and Arabic.

This application allows data to be entered manually so that the size of individuals can be compared to, and plotted graphically against, the international standards and references. In addition, large datasets can be imported directly into the application, which then calculates the respective centiles and z-scores based on the INTERGROWTH-21st Standards and References. The results can be exported for further analysis.

Weight, length, and head circumference for preterm infants until they reached 64 weeks’ postmenstrual age.

Language options available: English, Portuguese, Spanish, French, Italian, Russian and Arabic.