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Onion (Chopped)

'One medium onion' is cooking's vaguest measurement: it can range from 100g to 300g. For a soup, it might not matter, but in sauces, meatballs, or fillings, excess onion releases water that can ruin the texture. Weighing chopped onion gives you total control over flavor and moisture.

What is Onion (Chopped)?

'One medium onion' is cooking's vaguest measurement: it can range from 100g to 300g. For a soup, it might not matter, but in sauces, meatballs, or fillings, excess onion releases water that can ruin the texture. Weighing chopped onion gives you total control over flavor and moisture.

Chopped, sliced, or shredded pieces trap different amounts of air, so cup volume is shape-dependent. A fine chop usually settles heavier than a rough cut at the same cup mark. Weigh your preferred cut style once and reuse that baseline for repeatable cooking.

Chef note:Knife cut is a measurement tool: finer cuts settle heavier in the same cup.

Quick convert

  • US cup = 236.588 mL
  • 1 tbsp = 14.787 mL
  • 1 tsp = 4.929 mL
Density source:USDA FoodData Central

Cups-to-Grams Printable Chart

100+ ingredients with exact gram weights per cup, tbsp and tsp. The reference card every cook needs.

FAQ

Small, Medium, Large Onion: What are the weights?
Roughly: Small = 110g, Medium = 150-170g, Large = 250g+. But nature varies. If a recipe calls for '1 cup chopped onion', aim for about 150g.

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