Pregnancy Weight Gain Calculator

Recommended weight gain based on your pre-pregnancy BMI.

Your details

Total recommended gain
11.5–16 kg
Pre-pregnancy BMI 22
By week 20
3.7–5.1 kg
Target weight at birth
72–76 kg

Guidelines

Ranges follow the U.S. Institute of Medicine 2009 guidelines. Most gain happens after the first trimester.

Please note

This tool gives a general estimate for information only. It is not medical advice — talk to a doctor or pharmacist about your own situation.

Frequently asked questions

Is gaining less a problem?

Talk to your midwife or doctor if you're well outside the range.