A source reference connects a stated amount of a particular ingredient with a measured or published weight. It is useful only when its ingredient state and unit definition fit the question you are asking.
Inspect the selected reference
On an ingredient page, inspect the reference table and cited sources for the original amount, preparation state, available volume definition, and review date. The converter’s source selector, method note, and View source link identify the relationship currently in use.
The checked date records a review of the cited material. It does not mean BatchLadle performed a laboratory measurement, tested every brand, or received an endorsement from the publisher.
Distinguish a source measure from a defined volume
A chart may give grams per cup without defining that cup in millilitres. BatchLadle can preserve that relationship as a source cup. It cannot infer an exact physical cup volume merely from the publisher’s location.
For example, King Arthur’s flour reference and a Women’s Weekly Food reference can describe different methods and measures. The latter defines a 250 mL cup in its conversion guide. Keep each reference separate; selecting a new unit system should not silently select a new source.
Match the state before calculating
Choose the form actually used in the recipe: packed, sifted, chopped, dry, or another state shown by the reference. A similar name is not enough when preparation changes what fits in a measure.
When multiple references are offered, read their differences before choosing. An approximate result is a culinary estimate tied to that choice, not a promise that every package will weigh the same.
When the conversion is unavailable
Keep the original quantity and unit, select a reference with an appropriate defined volume, or provide a measurement that you can document. Do not borrow a density from a different ingredient merely to produce a number.
Mass-to-mass and volume-to-volume calculations within a defined system do not require an ingredient density. A missing mass–volume reference should therefore be explained at the conversion that needs it, while the original recipe remains usable.