Calculator
Pregnancy weight-gain calculator
See a commonly used estimated weight-gain range for a singleton pregnancy from pre-pregnancy height and weight (BMI).
The tool uses pre-pregnancy height and weight to place BMI in a band often cited for singleton pregnancies. Twin, IVF or special diets can sit outside these bands.
Calculate
Result
Enter the details and press Calculate. The result will appear here.
How to use it
- Enter pre-pregnancy weight and height.
- Optionally add current week.
- The tool shows a general range, not a target you must hit.
Points to watch
- BMI bands are population guides, not a personal prescription.
- Your clinician may use a different plan.
Frequently asked questions
Is this a diet programme?
No. It only recalls commonly used ranges. Eating plans belong with a clinician or dietitian.
What if I am expecting twins?
Twin pregnancies often use different ranges. This tool is framed for a singleton pregnancy.
Source and method note
BMI-based singleton gain ranges are a general educational frame. They are not a treatment target.
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