Calculator of Weekly Pregnancy Weight Gain
Online health calculator, which helps to calculate how much weight, should gain weekly during pregnancy period.
Formula of Weekly Pregnancy Weight Gain
Example of Weekly Pregnancy Weight Gain
Sarah’s pre-pregnancy weight was 60 kg and her current height is 170 cm, current weight is 70 kg. She wanted to find her weight gain at 17th week. Calculate her weight gain for 40th week and 17th week.
Given :
Pre pregnancy Weight = 60 kg Current Height = 170 cm = 1.7 m Current Weight = 70 kg
To Find,
Weight gain for 17th week and weight gain for 40th week
Solution
Step 1:
Calculate the BMI of Sarah before pregnancy BMI = 60 / (1.7 x 1.7) BMI = 60 / 2.89 BMI = 20.76
Step 2:
Find Category of Sarah based on BMI from the following table
| BMI | Category | Weight gain (kgs) |
|---|---|---|
| < 18.5 | Underweight | 12.7 – 18.1 |
| 18.5 – 24.9 | Normal weight | 11.3 – 15.9 |
| 25 – 29.9 | Overweight | 6.8 – 11.3 |
| > 30 | Obese | 5 – 9.1 |
Sarah was Normal weight. So, Sarah will gain weight between 11.3 – 15.9 kgs at 40th week.
Step 3:
Sarah’s Weight at 17th week is calculated as follows:
| Weight gain at 17th week | = 2.5 – 4.9 kgs |
| = (60 + 2.5) – (60 + 4.9) kgs | |
| Weight should be | = 62.5 – 64.9 kgs |
Step 4:
Sarah’s Weight at 40th week is calculated as follows:
| Weight gain at 40th week should be | = (60 + 11.3) – (60 + 15.9) kgs |
| = 71.3 – 75.9 kgs |
Step 5:
Sarah’s current weight is 70 kgs, but the current weight should be between 62.5 -64.6 kgs. So she is considered as overweight.