Pregnancy Weight Gain Calculator
Calculate your recommended weight gain during pregnancy based on your pre-pregnancy BMI. This calculator provides guidelines for healthy weight gain throughout your pregnancy by week and trimester.
Recommended Weight Gain: 25-35 lbs
Your Pre-pregnancy BMI: 24.2
BMI Category: Normal weight
| Current Recommended Weight | 157-162 lbs |
|---|---|
| Total Weight Gain So Far | 7-12 lbs |
| Remaining Recommended Gain | 18-23 lbs |
Weight Gain by Trimester
| Trimester | Weeks | Recommended Gain | Rate per Week |
|---|---|---|---|
| First | 1-12 | 1-5 lbs | 0-0.5 lbs |
| Second | 13-27 | 12-14 lbs | 0.5-1 lb |
| Third | 28-40 | 8-12 lbs | 0.5-1 lb |
About Pregnancy Weight Gain
Gaining the right amount of weight during pregnancy is important for your health and your baby's health. The amount of weight you should gain depends on your pre-pregnancy Body Mass Index (BMI).
How Pregnancy Weight Gain is Calculated
This calculator uses your pre-pregnancy weight and height to determine your BMI, then provides weight gain recommendations based on guidelines from the Institute of Medicine (IOM):
| Pre-pregnancy BMI | BMI Category | Recommended Weight Gain |
|---|---|---|
| Below 18.5 | Underweight | 28-40 lbs (12.5-18 kg) |
| 18.5-24.9 | Normal weight | 25-35 lbs (11.5-16 kg) |
| 25.0-29.9 | Overweight | 15-25 lbs (7-11.5 kg) |
| 30.0 and above | Obese | 11-20 lbs (5-9 kg) |
Where Does the Weight Go?
Pregnancy weight gain isn't just fat. Here's how the weight is typically distributed:
- Baby: 7-8 pounds
- Placenta: 1-2 pounds
- Amniotic fluid: 2 pounds
- Uterus: 2 pounds
- Breast tissue: 2 pounds
- Blood volume: 4 pounds
- Fluids: 4 pounds
- Fat stores: 7 pounds
Healthy Weight Gain Tips
To ensure healthy weight gain during pregnancy:
- Eat a balanced diet with plenty of fruits, vegetables, whole grains, and lean proteins
- Stay active with moderate exercise (with your doctor's approval)
- Monitor your weight gain regularly but don't obsess over the scale
- Focus on nutrient-dense foods rather than empty calories
- Stay hydrated and get plenty of rest