buncha/health & fitness/pregweight

Pregnancy Weight Tracker

Stays on this device. Setup + readings are saved to localStorage only — no account, no upload.

Units

One-time setup

Pre-pregnancy weight (lb)

Height — feet

Height — inches

Last menstrual period (LMP)

Anchors the gestational-week calculation. Estimate if exact date is fuzzy — your OB/midwife has the official date.

About the ranges. Recommended-gain bands come from the Institute of Medicine's 2009 guidance for SINGLETON pregnancies, keyed off pre-pregnancy BMI. First-trimester gain is small (~1–4 lbs) regardless of category; the steady weekly slope kicks in around week 14. Ranges are guidance for healthy populations — your OB or midwife may set different targets based on your history. Carrying twins? IOM 2009 has a separate table — talk to your provider, this tool isn't sized for multiples.

Read the guide

Pregnancy Weight Gain — What the IOM Bands Actually Mean

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About Pregnancy Weight Tracker

Log weight by gestational week against the IOM recommended range for your pre-pregnancy BMI. Stays on your device.

Like every tool on Buncha, this one runs entirely in your browser. There's no upload, no log, no record of what you've pasted or generated. Close the tab and the data is gone.

↳ Have feedback or found a bug? hello@buncha.tools