Pregnancy Weight Gain Calculator
Compare weight gained so far with the usual recommended range for your starting BMI band.
Quick answer: enter your details below and click Check Weight Gain — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Enter your pre-pregnancy weight.
- Enter your current weight.
- Choose your pre-pregnancy BMI band and click Check Weight Gain.
About this tool
Recommended total gain depends on pre-pregnancy BMI band, with lower bands having higher ranges. Enter your starting weight, current weight, and band, and the tool shows the recommended total range and how much of it is already used. This is general information only, not medical advice — check with a clinician about your own pregnancy.
Frequently asked questions
Do the ranges cover twins?
No, twin pregnancies have higher recommended ranges; this tool covers single pregnancies only.
Is this medical advice?
No. It is general information, and your clinician's advice for your pregnancy comes first.
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