PregnancyCalc.comPregnancy Calculators
Week-by-Week Tracker
Weight Gain by Week Calculator
Track your pregnancy weight gain against a week-by-week schedule. See how your gain compares to ACOG recommendations at every stage.
All 40 weeks
BMI-personalised
On-track status
Pregnancy Weight Gain Calculator by Week — Week-by-Week Weight Gain Tracker
Enter your details to see your expected gain at every milestone, plus a full week-by-week table.
⚠ This calculator uses ACOG (American College of Obstetricians and Gynecologists) guidelines. Always follow your healthcare provider’s advice for your specific pregnancy.
1–40 weeks
Leave blank to see targets only
Total Gain Target
25-35 lbs
Full pregnancy
Target at This Week
Enter week
Expected now
Your BMI Category
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Determines ranges
Weight Gain Progress
0 lbs gainedTarget range
ACOG Recommended Weight Gain by BMI Category
Underweight
28-40 lbs
BMI < 18.5
Normal
25-35 lbs
BMI 18.5-24.9
Overweight
15-25 lbs
BMI 25-29.9
Obese
11-20 lbs
BMI ≥ 30
Week-by-Week Gain Table
| Week | Expected Gain Range | Remaining to Gain |
|---|
Pregnancy Weight Gain Calculator by Week — Key Information
Rate of GainAfter the first trimester, normal-weight women should gain about 0.5-1 lb per week.
First TrimesterOnly 1-4.5 lbs gained in weeks 1-12 is normal. Morning sickness often limits gain.
Second TrimesterAppetite usually returns. This is the most consistent gain period.
Third TrimesterGain continues but may slow slightly in the final weeks.
Too Much GainCan increase risk of gestational diabetes and C-section.
Too Little GainMay affect foetal growth. Your healthcare provider can advise on nutrition.