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INTERGROWTH-21st Applications and Calculators

The INTERGROWTH-21^st Consortium has developed a series of easy-to-use tools to compare clinical measurements against newly created standards.

	Description	Applications	Instructions	Other
Pregnancy Dating	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).	Excel-based GA Calculator	N/A	Centiles and z-scores of large datasets can also be calculated.
Fetal Size in Early Pregnancy	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	Excel-based CRL Calculator	N/A	Centiles and z-scores of large datasets can also be calculated.
Estimated Fetal Weight	The “Estimated Fetal Weight" Calculator is an Excel-based application. It produces centiles and z-scores for these measurements based on the INTERGROWTH-21^st Estimated Fetal Weight Standards.	Excel-based EFW Calculator	N/A	Centiles and z-scores of large datasets can also be calculated.
Symphysis-Fundal Height	The "International Symphysis-Fundal Height" Calculator is an Excel-based application. It produces centiles and z-scores for these measurements based on the INTERGROWTH-21^st Symphysis-Fundal Height Standards.	Excel-based SFH Calculator	N/A	Centiles and z-scores of large datasets can also be calculated.
Gestational Weight Gain	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-21^st Standards.	Excel-based GWG Calculator	N/A	Centiles and z-scores of large datasets can also be calculated.

	Description	Applications	Instructions	Other
Fetal Growth*	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. In addition, large datasets can be imported directly into the application, which then calculates the respective centiles and z-scores based on the INTERGROWTH-21^st Standards. The results can be exported for further analysis.	Download Windows app (note: large file size) Download Mac app (note: large file size) Open app in web-browser	User Guide	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 and Spanish
Newborn Size*	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-21^st Standards and References. The results can be exported for further analysis.	Download Windows app (note: large file size) Download Mac app (note: large file size) Open app in web-browser	User Guide	Weight, length, and head circumference for newborns between 24⁺⁰ to 42⁺⁶ weeks’ gestation. Language options available: English, Portuguese and Spanish
Postnatal Growth of Preterm Infants*	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. In addition, large datasets can be imported directly into the application, which then calculates the respective centiles and z-scores based on the INTERGROWTH-21^st Standards. The results can be exported for further analysis.	Download Windows app (note: large file size) Download Mac app (note: large file size) Open app in web-browser	User Guide	Weight, length, and head circumference for preterm infants until they reached 64 weeks’ postmenstrual age. Language options available: English, Portuguese and Spanish

*If you wish to verify the file integrity of the INTERGROWTH-21^st tools prior to installation, download the MD5/SHA checksum value here.

To access all the INTERGROWTH-21^st resources, click HERE.