BMI Calculator
Weight, Height
Calculate your body mass index and see the WHO adult category.
Pregnancy Weight Gain Calculator
Recommended total weight gain for a single pregnancy from your pre-pregnancy BMI (IOM 2009).
Your result will appear here
Enter your measurements, then press Calculate.
Methodology
Institute of Medicine (2009)
BMI < 18.5: 12.5–18 kg; 18.5–24.9: 11.5–16 kg; 25–29.9: 7–11.5 kg; ≥ 30: 5–9 kg
Recommendations for women carrying one baby; twin pregnancies have different ranges.
- Who it is for
- Adult women with a singleton pregnancy.
- Version
- 1.0.0
Worked example: how to calculate pregnancy weight gain
Inputs
- Weight before pregnancy
- 60 kg
- Height
- 165 cm
Result
- Recommended total gain — from
- 11.5 kg (≈ 25.4 lb)
- Recommended total gain — to
- 16 kg (≈ 35.3 lb)
- Pre-pregnancy BMI
- 22 kg/m²
An illustration with sample values, worked out with the same method the tool above uses.
Limitations
- Ranges are for singleton pregnancies in adult women.
References
- Institute of Medicine and National Research Council. Weight Gain During Pregnancy: Reexamining the Guidelines. Washington, DC: National Academies Press; 2009. doi:10.17226/12584
Continue with your measurements
Shared measurements carry over automatically, in this tab only.
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