Estimate child weight growth using clear inputs and transparent formulas, with results intended for planning and comparison.
How to use this calculator
For child weight growth calculator, enter Previous weight (kg), Current weight (kg), Months between measurements using the unit or format beside each field. Select Calculate to apply the formula below, review all returned values together, and use Reset to restore the demonstrated inputs before testing another scenario.
Formula & calculation method
weightChange = currentWeight-previousWeight; monthlyWeightChange = (currentWeight-previousWeight)/months; weightChangePercent = 100*(currentWeight-previousWeight)/previousWeightWorked example
For a reproducible child weight growth calculator example, use Previous weight: 15; Current weight: 18; Months between measurements: 12. The first returned value, weight change, is calculated with currentWeight-previousWeight; the other results describe the same scenario. Change one input at a time and keep its unit consistent when comparing scenarios.
Limitations to keep in mind
Child growth must be interpreted with an appropriate age-and-sex growth chart and clinical context. This calculation is not a pediatric assessment.