Try out the Weight Gain Calculator

Weight gain calculation.
There is a simple calculation that can provide a basic overview of how much weight should be added over nine months depending on normal weight and height prior to pregnancy.

The formula is simply:
weight (Kg) / Height (M) ²
i.e. the weight in Kilograms divided by the height in meters squared.

This results in a number that can be used as a guide for weight gain. 

• A number less than 18 means that she is skinny - up to 20 Kg (44 pounds) weight gain is just within the acceptable range.

• Between 18 and 20 means thin - between 13 Kg (28.6 pounds) and 17 Kg (37.4 pounds) of extra weight over 9 months is normal

• Between 20 and 23 is normal - about 12 Kg (26.4 pounds) weight gain is normal

• More than 23 means that she is already large and can safely try to add less weight than others during the pregnancy. Between 8 Kg (17.6 pounds) and 11 Kg (24.2 pounds) would allow some reserves to be used up. 

NOTE: No matter how much is eaten and how much weight is gained, it is essential that a woman takes all of the vitamins and minerals prescribed by the doctor.

See also:

How much weight should your partner gain during her pregnancy?

Exceptions to the general weight gain rules in pregnancy.

What makes up the extra weight gained whilst pregnant?

How much weight should be taken at each stage of pregnancy?

Summary of your baby's growth during pregnancy.

Try out the Weight Gain Calculator

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