Baby Weight Gain Check
Check a baby's weekly weight gain against typical ranges.
About Baby Weight Gain Check
Weight velocity measures grams gained per week between two weigh-ins and compares it with typical ranges for the baby's age. Remaining within the band is the reassurance pediatricians look for at well visits. Weight gain is the earliest, most sensitive marker of infant health, so a simple at-home velocity check tells parents when to mention concerns to their doctor.
Formula
Baby Weight Gain Check
g/week = weight gained / weeks, compared with typical bands (150-200 g for 0-3 mo, 100-150 for 3-6, 60-90 for 6-12, 30-40 for 1-2 y)
- age band
- Typical weekly weight-gain ranges by age
Worked example
With the default values below, Baby Weight Gain Check returns Weight Gain per Week of 88. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Age groupone of 0-3 months, 3-6 months, 6-12 months, 1-2 years
- 6-12 months
- Current weight (kg)minimum 0
- 6.5
- Previous weight (kg)minimum 0
- 5.8
- Weeks between weigh-insminimum 1
- 8
Results
- Weight Gain per Week
- 88 g
- Typical Range (low)
- 60 g/week
- Typical Range (high)
- 90 g/week
- Verdict
- Within typical range
Step by step
- 1Values used
- 2Baby Weight Gain Check
- 3Weight Gain per Week= 88 g
- 4Typical Range (low)= 60 g/week
- 5Typical Range (high)= 90 g/week
- 6Verdict= Within typical range
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- For guidance only; pediatricians interpret growth in context of the whole chart.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
For guidance only; pediatricians interpret growth in context of the whole chart.
Frequently Asked Questions
How is Baby Weight Gain Check calculated?
g/week = weight gained / weeks, compared with typical bands (150-200 g for 0-3 mo, 100-150 for 3-6, 60-90 for 6-12, 30-40 for 1-2 y) Weight velocity measures grams gained per week between two weigh-ins and compares it with typical ranges for the baby's age. Remaining within the band is the reassurance pediatricians look for at well visits.
Why does Baby Weight Gain Check matter?
Weight gain is the earliest, most sensitive marker of infant health, so a simple at-home velocity check tells parents when to mention concerns to their doctor.
What values do I need to enter?
This calculator takes 4 inputs: Age group, Current weight (kg), Previous weight (kg), Weeks between weigh-ins. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.