Growth tracking guide
Keeping Baby Weight and Growth Records You Can Read
Weight is the number parents check most often and worry about most. It drops a little from yesterday and the worry starts; then the bathroom scale disagrees with the clinic scale and it gets worse. Growth records are not there to judge a day. They exist to show a direction over weeks.
Last reviewed 2026-08-08 · A general record-keeping guide, not medical advice.
Consistent conditions beat an accurate scale
The most common mistake in growth tracking is letting the conditions drift. Weigh once after a feed, once with a nappy on, and the chart moves without the baby changing at all.
Lock these down:
- Time of day (for example, before the morning feed)
- Clothing and nappy state (for example, nappy only)
- Which device (home scale or clinic scale)
Drift in conditions produces far larger errors than the instrument ever will.
Look at the line, not the dot
Day-to-day change is easily produced by a feed and a nappy change alone. Comparing today with yesterday is almost always meaningless.
| Window | What you can see | | --- | --- | | One day | Essentially nothing — normal fluctuation | | One week | A direction, faintly | | Two to four weeks | The growth trend | | Between check-ups | Movement along the curve |
The bottom two rows are the reason to keep records at all.
Make it usable at the check-up
Well-baby visits ask what has changed. Answering from memory usually means describing the last few days' impression.
Putting measurements next to the feeding situation from the same period makes the account far more accurate. The feeding side is covered in newborn feeding records — having feed counts and intervals alongside the weight makes it much easier for a clinician to follow.
Copy clinic measurements across
For anything hard to measure at home, transcribing the clinic's numbers is enough. Head circumference is the usual case.
Always include the date and where it was measured. Without that, clinic values blend into home values and the trend becomes unreadable.
Staying steady when the number moves
Track growth long enough and the number starts to feel like a target. When that happens, it is worth remembering that a growth chart is a distribution, not a ranking.
A low percentile with steady progress along the same curve is generally not a concern. Sharp movement across curves, up or down, is what warrants a look. That judgement, though, belongs to a clinician rather than to the parent reading the chart.
Frequently asked questions
- Is it fine to weigh every day?
- Daily weighing mostly exposes you to day-to-day noise. Unless you have been told otherwise, weekly is a better interval for seeing a trend.
- My home scale and the clinic scale disagree. Which is right?
- Devices have their own offsets, so chasing an absolute value is less useful than following each one's trend. Recording where you weighed keeps the two series from contaminating each other.
- My baby is on a low percentile. Is that a problem?
- Following their own curve steadily is generally considered more informative than the percentile itself. Interpretation belongs with a clinician, so bring the record along if a change concerns you.
- Do I need to measure head circumference at home?
- It is difficult to do accurately at home. Rather than forcing it, copying the measurement from each check-up into your record works perfectly well.
- Can I mix weights taken with and without a nappy?
- No. The nappy's weight becomes your error. Picking one condition and sticking to it matters more than the precision of the scale.
Sources
Shared records instead of memory