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Pregnancy Weight Gain Calculator

Recommended gain by BMI.

Pregnancy weight gain

Pre-pregnancy BMI
23.3
Normal
Total gain recommended
25–35 lb
Singleton pregnancy · Institute of Medicine
Expected at wk 20
9.4–12.0 lb
Linear catch-up after the 4-lb T1 baseline
Per week (T2 + T3)
0.78–1.15 lb/wk
Recommended weekly gain after week 13
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Pregnancy Weight Gain Calculator · Generated 5/2/2026 · calccenter.online/calculators/health/pregnancy-weight-gain

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About the Pregnancy Weight Gain Calculator

MethodologyHome

Recommended gain by BMI. Use this free pregnancy weight gain calculator to get instant results. All calculations run in your browser — nothing is sent to a server.

Frequently asked questions

What does this Pregnancy Weight Gain Calculator do?

Recommended gain by BMI.

Is it free?

Yes — every calculator on Calc Center is free, with no sign-up or account required.

Does it work offline?

The site is a Progressive Web App — after your first visit, most pages work without an internet connection.