Convert ounces (weight) to cups (us legal) for cooking measurements.
Definition: An ounce is a unit of mass in the US customary and imperial systems equal to about 28.3495 grams.
History/origin: The ounce has roots in Roman and later English measurement systems and remained common in cooking where imperial units persisted.
Current use: Ounces are used in US recipes, food packaging, and kitchen scales for dry and solid ingredient weights.
Definition: The US legal cup is a regulatory volume measure, not the usual home-cooking cup. Its value is exactly 240 mL.
History/origin: Food labeling rules needed a clean, consistent serving-size measure, so regulators defined a cup value that differs slightly from the customary kitchen cup.
Current use: The legal cup is used in US nutrition facts, serving-size references, packaged-food compliance, and official calculations where exact label values matter.
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Converting ounces to grams and back is a constant need when cooking from recipes that mix US and metric measurements. Here is the exact conversion, a full reference table, and notes on how food packaging uses these units.
How many teaspoons in a tablespoon? How many tablespoons in a cup? Here are the exact equivalents for US cooking volume measurements, with a reference table and practical notes on where these units trip people up.
