Pregnancy Weight Gain by Week Calculator
Expected weight gain range by gestational week.
Enter your values
ⓘ Live results
Results
- Suggested gain to date
- 5.6 - 8 kg
- Total recommended by term
- 11.5 - 16 kg
- Current week
- 24 weeks
Quick answer
Recommended pregnancy weight gain depends on pre-pregnancy BMI category and gestational week, per IOM guidelines.
IOM total gain ranges by BMI category, distributed across trimesters
How to use the Pregnancy Weight Gain by Week Calculator
- 1Select your pre-pregnancy BMI category and enter your current week of pregnancy.
- 2The ranges follow US Institute of Medicine guidelines and are population averages.
- 3This is general guidance only — always follow the specific advice of your obstetric care provider.
Worked example
Using the values the calculator loads with:
Inputs
- Pre-pregnancy BMI categoryNormal (18.5-24.9)
- Current week24 weeks
Results
- Suggested gain to date5.6 - 8 kg
- Total recommended by term11.5 - 16 kg
- Current week24 weeks
Frequently asked questions
What if I'm gaining faster or slower?
Some variation is normal, but discuss significant deviations with your midwife or doctor.
Does twin pregnancy change this?
Yes, multiples have higher recommended gain ranges not covered by this tool.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.