womens health tool
Pregnancy Weight Gain Calculator
Find your target maternal weight gain curve over the 40 weeks of gestation based on your pre-pregnancy BMI.
Interactive Calculator System
normal
20
1 40
Real-time Calculated Outputs
Minimum Weight Gain recommended
4.4lbs/kg
Maximum Weight Gain recommended6 lbs/kg
At Week 20 of your pregnancy, the recommended healthy cumulative weight gain range is 4.4 to 6 kg relative to your pre-pregnancy baseline.
Methodology & Formula: IOM Pregnancy Guidelines
Calculates cumulative safe weight gain targets based on pre-pregnancy BMI (Underweight, Normal, Overweight, Obese) over each trimester.
Standard Reference Calculations
Healthy BMI at Week 24
Inputs: BMI: 21, Week: 24
Output: Target Gain: 6.8 - 9.1 kg
Frequently Asked Questions
Get answers to common queries based on clinical literature and fitness research.
Maternal weight gain is very gradual during the first trimester (usually 1-2 kg total), and speeds up significantly in the second and third trimesters.