Maternal Weekly Weight Gain Calculator
Actual compatible maternal weight change per measured elapsed week, not recommended gain, fetal growth or inferred adiposity.
Description
Weekly maternal weight gain compares two matched weights over an explicitly supplied interval.
Weekly maternal weight gain compares two matched weights over an explicitly supplied interval.1
Baseline definition and observation timing affect interpretation of the signed rate.
When to use Maternal Weekly Weight Gain Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the observation date, units, measurement context and independently applicable clinical reference or calibrated model.
How to use Maternal Weekly Weight Gain Calculator and understand its results
- Establish the observation date, units, measurement context and independently applicable clinical reference or calibrated model.
- Enter previousMaternalWeightKg, currentMaternalWeightKg, elapsedWeeks, using the field meanings and rules below, then run the tool.
- Read result.signedMaternalWeightChangeKgPerWeek. Use the units and sign conventions below.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| previousMaternalWeightKg | Previous maternal weight kg | number | Required |
| currentMaternalWeightKg | Current maternal weight kg | number | Required |
| elapsedWeeks | Elapsed weeks | number | Required |
Require positive previous/current weights and positive elapsed weeks. Divide current-minus-previous weight by that interval, preserving a negative loss rate.
gainKgPerWeek=(currentKg−previousKg)/elapsedWeeks Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result; its nested fields below contain the actual calculation or selected reference | object |
| result.signedMaternalWeightChangeKgPerWeek | Signed Maternal Weight Change Kg Per Week; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"previousMaternalWeightKg": 60,
"currentMaternalWeightKg": 61,
"elapsedWeeks": 2
},
"output": {
"result": {
"signedMaternalWeightChangeKgPerWeek": 0.5
}
}
}Limitations and assumptions
Dating evidence, acquisition conditions and applicable clinical references remain independently established. The output describes supplied observations or a conditional model without diagnosing an outcome, choosing a dose or verifying clinical applicability.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Postpartum Weight Loss Rate Calculator: Postpartum weight-loss rate compares matched body-weight measurements over elapsed time. For a complementary comparison, use Total Maternal Weight Gain Calculator: Total maternal weight gain compares current weight with a declared baseline.
References
-
Maternal Weekly Weight Gain Calculator — tool.io
Similar or alternative tools
- Postpartum Weight Loss Rate Calculator
Postpartum weight-loss rate compares matched body-weight measurements over elapsed time.
- Total Maternal Weight Gain Calculator
Total maternal weight gain compares current weight with a declared baseline.