Description
Scale a label's per-serving amount to supplied consumed grams.
Dietary arithmetic depends on as-purchased versus edible mass, per-serving versus per-100-gram bases, measured versus trace states and recall periods. A recorded allergen list is not a verified allergen-free declaration. Portion counts, label intervals and mass differences use supplied assumptions rather than establishing actual intake or nutritional suitability.
Scale a label's per-serving amount to supplied consumed grams.
When to use this tool
Use Food Label Serving Weight Crosswalk when you already have labelServingGrams, consumedGrams, amountPerLabelServing and need to scale a label's per-serving amount to supplied consumed grams.
How to use the tool and how it works
- Enter labelServingGrams, consumedGrams, amountPerLabelServing. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read labelServings, consumedAmount. Use the output convention below.
Require serving grams>0 and consumed grams/amount>=0; servings=consumed/serving, amount=amountPerLabelServing*consumed/serving.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| labelServingGrams | Label Serving Grams | Required. Finite number; strictly above 0. |
| consumedGrams | Consumed Grams | Required. Finite number; minimum 0. |
| amountPerLabelServing | Nonnegative amount in the stated nutrient/quantity unit per labeled serving, not per 100 g. | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| labelServings | Label Servings | Required. Finite number. |
| consumedAmount | Consumed Amount | Required. Finite number. |
{
"input": {
"labelServingGrams": 40,
"consumedGrams": 60,
"amountPerLabelServing": 8
},
"output": {
"labelServings": 1.5,
"consumedAmount": 12
}
}Limitations and assumptions
- Units and food basis must match. No actual composition, consumption, nutrient adequacy or recommended intake is established.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Check original food labels, composition sources, ingredient/allergen information and dietary records before combining amounts. Use a complete appropriately interpreted dietary assessment when requirements or suitable intake matter; local scaling and source labels do not make those judgments.
References
Similar or alternative tools
- Nutrient Contribution Per Edible Gram
Scale a supplied per-100-gram nutrient value to edible mass.
- Food Package Multiple Serving Fraction
Calculate consumed mass as package fraction and labeled-serving equivalents.