Gestational Diabetes: Calculation of Caloric
  Requirements and Initial Insulin Dose-BETA

Home > Calculators >Calculation of Caloric Requirements and Initial Insulin Dose
The calculator below will estimate the BMI , recommended weight gain and energy requirement for a singleton or twin pregnancy [1,5] .To use the calculator enter the patient's age , prepregnancy weight, height, trimester , whether or not the pregnancy is a twin pregnancy ,and the mother's activity level, then press the 'calculate' button.  
Input age
Input prepregnancy weight
Input Height
Trimester First Second Third
Twins? No Yes
Activity level What's this? SedentaryLow Active Active Very Active


The calculator below will estimate a simple insulin regimen using multiple daily injections of rapid-acting or regular insulin and NPH insulin [2-4] . To use the calculator enter the current weight, select the units /kg of insulin to give using the table below and press the 'calculate' button.

Weeks of Gestation Total Daily Insulin
Week 1-17 0.7  to 0.8  U/kg  actual body weight
Weeks 18-24 0.8  to 1     U/kg  actual body weight
Weeks 25-32 0.9  to 1.2  U/kg  actual body weight
Weeks 33-38 1.2  to 2     U/kg  actual body weight

Input current weight     
Input insulin dose 



Body Mass Index (BMI) = Weight (kg) / Height (m2)

Estimated energy requirement (EER) [1]

1418 years of Age
EER = 135.3 − (30.8 age [y]) + PA [(10.0 weight [kg]) + (934 height [m])] + 25

19 Years and Older
EER = 354 − (6.91 age [y]) + PA [(9.36 weight [kg]) + (726 x height [m])]

Physical Activity Coefficients (PA values) for Use in EER Equations for Adolescents or Adult Women
  14 to 18 years  19 years or older
Sedentary 1 1
Low Active 1.16 1.12
Active 1.31 1.27
Very active 1.56 1.45

EER for twins is as recommended by Goodnight W, et al.[5]

Additional diabetes related calculators:

Free Patient educational Materials (brochures, food guides,  weight gain grids, etc.) available at:
 California Diabetes and Pregnancy Program CDAPP Sweet Success Resource & Training Center


1. Institute of Medicine (US) and National Research Council (US) Committee to Reexamine IOM Pregnancy Weight Guidelines; Rasmussen KM, Yaktine AL, editors. Weight Gain During Pregnancy: Reexamining the Guidelines. Washington (DC): National Academies Press (US); 2009. B, Supplementary Information on Nutritional Intake. Available from:
2. Mark B. Landon, Patrick M. Catalano, and Steven G. Gabbe Diabetes Mellitus Complicating Pregnancy In
Gabbe: Obstetrics: Normal and Problem Pregnancies, 6th ed.2012 p.907
3. Guidelines for Care, California Diabetes and Pregnancy Program,2012. p 40-44  
4.  Jovanovic L. Role of diet and insulin treatment of diabetes in pregnancy. Clin Obstet  Gynecol 2000; 43(1): 46-55 PMID: 10694987
5. Goodnight W, et al. Optimal nutrition for improved twin pregnancy outcome. Obstet Gynecol. 2009 PMID: 20168116


All calculations must be confirmed before use. The suggested results are not a substitute for clinical judgment. Neither nor any other party involved in the preparation or publication of this site shall be liable for any special, consequential, or exemplary

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