A familiar situation
Compare pregnancy gain with a published singleton or twin reference range before discussing an individual target with prenatal care.
How to use this calculator
- Enter pre-pregnancy height, pre-pregnancy weight, weight gained so far and the remaining inputs.
- Select Calculate to see the answer and its breakdown.
- Keep a scenario, change an input and compare the results.
Use consistent units and check the assumptions below before applying the result.
How pregnancy weight gain is calculated
The calculator selects the CDC-posted Institute of Medicine total-gain range using pre-pregnancy BMI and pregnancy type. A linear progress line is only a visual comparison, not a clinical trimester-specific growth model. For a singleton pregnancy with pre-pregnancy BMI 22, the reference total gain is 25–35 lb (about 11.3–15.9 kg).
Selects published total-gain range by pre-pregnancy BMI and singleton/twin pregnancy.For a singleton pregnancy with pre-pregnancy BMI 22, the reference total gain is 25–35 lb (about 11.3–15.9 kg).
Assumptions & useful context
Population reference only; individual pregnancy goals should be set with prenatal care.
Health calculations are estimates for education. They cannot diagnose a condition or replace a clinician’s assessment. Individual needs vary, especially during pregnancy, illness and growth.
Frequently asked questions
Are these ranges a personal medical goal?
They are population recommendations; a prenatal clinician can individualize them.
Does the reference cover triplets?
No. Ask a maternity-care professional for a multiple pregnancy beyond twins.