Pregnancy Weight Gain Calculator

📋 This is a sample result. To calculate your own, click here.
⚠️
2.4 lbs above the recommended range
Consider discussing with your healthcare provider.
Gained so far
15 lbs
Expected at week 20
9 - 12.6 lbs
Healthy Range (Week 20)
149 – 152.6 lbs
Recommended total gain: 25 - 35 lbs (0.8 - 1 lbs/week)
👶
1st Trimester 2nd Trimester 3rd Trimester
Pre-pregnancy BMI: 23.3 (normal)
A healthy weight range for you by the end of your pregnancy at 40 weeks should be between 165 lbs and 175 lbs. Your perfect weight is 170 lbs.

Pregnancy Weight Gain Chart

Your pre-pregnancy body mass index (BMI) is 23.3, which is considered normal.

Where Do I Stand With My 15 lbs Weight Gain?

Based on your pre-pregnancy weight of 140 lbs, we calculated your BMI to be 23.3, which is considered normal according to the Institute of Medicine of the National Academies. This week you should weigh between 149 lbs and 152.6 lbs.

Pre-pregnancy
140 lbs
Current
155 lbs
Gained so far
15 lbs

Weekly Pregnancy Weight Gain

  Below Average Above Average Normal
  Gain Weight Gain Weight Gain Weight
Week 0 0 140 0 140 0 140
Week 2 0.28 140.28 0.4 140.4 0.34 140.34
Week 4 0.28 140.57 0.4 140.79 0.34 140.68
Week 6 0.28 140.85 0.4 141.19 0.34 141.02
Week 8 0.28 141.13 0.4 141.59 0.34 141.36
Week 10 0.28 141.42 0.4 141.98 0.34 141.7
Week 12 1.42 142.83 1.98 143.97 1.7 143.4
Week 14 1.42 144.25 1.98 145.95 1.7 145.1
Week 16 1.42 145.67 1.98 147.93 1.7 146.8
Week 18 1.42 147.08 1.98 149.92 1.7 148.5
Week 20 1.88 148.97 2.64 152.55 2.26 150.76
Week 22 1.88 150.85 2.64 155.19 2.26 153.02
Week 24 1.88 152.73 2.64 157.83 2.26 155.28
Week 26 1.88 154.62 2.64 160.46 2.26 157.54
Week 28 1.88 156.5 2.64 163.1 2.26 159.8
Week 30 1.42 157.92 1.98 165.08 1.7 161.5
Week 32 1.42 159.33 1.98 167.07 1.7 163.2
Week 34 1.42 160.75 1.98 169.05 1.7 164.9
Week 36 1.42 162.17 1.98 171.03 1.7 166.6
Week 38 1.42 163.58 1.98 173.02 1.7 168.3
Week 40 1.42 165 1.98 175 1.7 170

Pregnancy Weight Breakdown

If you gained the average of the range above, this is where the weight would go (totals are rounded):

🤰 You
Your uterus
2 lbs
Your breasts
2 lbs
Your increased blood volume
4 lbs
Body fluid
4 lbs
Fat and protein
7 lbs
Subtotal18.99 lbs
👶 Your baby
Fetus
7.5 lbs
Placenta
1.5 lbs
Amniotic fluids
2 lbs
Subtotal11 lbs
Total 29.99 lbs

Source: "Weight Gain During Pregnancy: Reexamining the Guidelines," Institute of Medicine, May 2009

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IMPORTANT: The Pregnancy Weight Tracker is a general educational aid only and should not be relied on as a substitute for the monitoring of your weight by your physician, midwife, or other healthcare provider. For more information, visit the ACOG guidelines or speak with your healthcare provider.