Convert Onion from Whole Onions to Grams
Use the tool below to convert onion from Whole Onions to Grams.
How much does an onion weigh in grams?
A medium, or average, onion weighs about 110 g, with a small one around 70 g and a large one around 150 g. Set the size selector to match what you have, then read the exact gram weight for any number of onions above.
Related Onion Ingredients
Already chopping? The chopped onion converter moves straight between cups, grams, and spoons of prepped onion. See our Chopped Onion converter.
Need a milder, more delicate allium? Shallots (20–60 g) suit dressings and pan sauces. See our Shallot converter.
Spring onions (10–25 g) are tender and herbaceous, great raw or as a garnish. See our Spring Onion converter.
Mincing garlic for the same dish? Garlic cloves (2–7 g) bring pungent bite where onion brings sweet body. See what one medium clove is in grams.
Want a crisp, peppery bite? Radishes (8–25 g) are sharp and crunchy, good raw in slaws or quick pickles. See our Radish converter.
Out of onion? See onion substitutes →
Onion converter tool
Enter an amount, pick your units, and set the size for counting whole onions.
Result
110 gOnion Calculators & Kitchen Tools
Working with onion? These tools handle the jobs a converter cannot.
- Oven to Air Fryer Converter Match the temperature and time when you swap the oven for an air fryer, fan oven, or slow cooker.
- Recipe Scaler Scale any recipe up or down and keep every ingredient in ratio.
Common Onion conversions
Quick reference for onion at medium size. Switch the size in the converter above for small or large.
| onions | Grams |
|---|---|
| 1 onion | 110 g |
| 2 onions | 220 g |
| 3 onions | 330 g |
| 4 onions | 440 g |
| 5 onions | 550 g |
| 6 onions | 660 g |
For the reverse conversion, see how many onions are in 200 grams.
Frequently Asked Questions
- How many grams is one medium onion?
- One medium onion is about 110 grams, a small one about 70 grams and a large one about 150 grams. Onions vary in size, which is the main reason a recipe that counts onions can still vary in weight. Set the size selector to match what you have, then read the exact figure for any count above. Open the onion converter
- How many grams is 2 onions?
- 2 onions are about 220 grams. The ratio is fixed, so one medium onion is 110 grams and the figure scales in a straight line as you multiply or divide. Scaling a recipe up or down keeps the same proportion, so work from whichever amount your recipe lists. Use the converter above for any other quantity of onion.
- How many grams is 3 onions?
- 3 onions are about 330 grams. The ratio is fixed, so one medium onion is 110 grams and the figure scales in a straight line as you multiply or divide. Scaling a recipe up or down keeps the same proportion, so work from whichever amount your recipe lists. Use the converter above for any other quantity of onion.