How much does a medium onion weigh in pounds?

A medium onion weighs about 0.24 lb (3.88 oz, 110 g). A small one is about 0.15 lb and a large one about 0.33 lb, so the pound total shifts with size. Set the size selector to match the onions you actually have before trusting a per-pound count, since the same weight in pounds maps to a different number of whole onions at each size.

Convert Onion from Pounds to Whole Onions

Onion converter

Use the tool below to convert onion from Pounds to Whole Onions.

Onion size swings from a 70 g small to a 150 g large, more than double. Setting the size below means “1 cup chopped” comes out right whether your onions are small or jumbo.

How many onions are in a pound?

About 4 medium onions make up a pound, since a pound is 454 g and a medium onion weighs 110 g. With small onions that rises to roughly 6, and with large onions it drops to about 3. Set the size selector to match the onions you have, then read the exact count above.

Out of onion? See onion substitutes →

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 our Garlic converter.

No scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.

Enter an amount, pick your units, and set the size for counting whole onions.

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Onion sizeSize applies to whole onions (small / medium / large).

Result

4.12 onions

Common Onion conversions

Quick reference for onion at medium size. Switch the size in the converter above for small or large.

Pounds	onions
0.5 lb	2.06 onions
1 lb	4.12 onions
1.5 lb	6.19 onions
2 lb	8.25 onions
3 lb	12.37 onions

Onion conversion chart

The chart below shows how whole onions (medium size) convert to cups, grams and ounces.

lb	onions	cups	cups (US)	g	oz
0.5 lb	2.06 onions	1.36 cups	1.42 cups (US)	226.8 g	8 oz
1 lb	4.12 onions	2.72 cups	2.83 cups (US)	453.59 g	16 oz
2 lb	8.25 onions	5.43 cups	5.67 cups (US)	907.18 g	32 oz
3 lb	12.37 onions	8.15 cups	8.5 cups (US)	1360.78 g	48 oz
5 lb	20.62 onions	13.58 cups	14.17 cups (US)	2267.96 g	80 oz

Onion varieties and best uses

The conversions above are the same whatever variety you use; the difference is what each is good for. Here is how the common onion varieties compare.

Variety	Best for
Yellow / brown	All-purpose cooking, soups, caramelising: balanced and sweetens when cooked.
Red	Raw in salads and pickling: mild, colourful; also good roasted.
White	Mexican dishes and salsa: sharp and clean raw.
Sweet (Vidalia / Walla Walla)	Onion rings and raw slices: low pungency, high sugar.
Shallot	Dressings and pan sauces: delicate, subtle flavour.

Which should I pick?

For everyday cooking, soups, and caramelising, a yellow / brown onion is the default, with the most balanced flavour. For raw use in salads, salsa, or pickling, a red or sweet (Vidalia / Walla Walla) onion is milder. White onions suit Mexican dishes; shallots are the delicate choice for dressings and pan sauces.

Frequently Asked Questions

How much does a medium onion weigh in pounds?: A medium onion weighs about 0.24 lb (3.88 oz, 110 g). A small one is about 0.15 lb and a large one about 0.33 lb, so the pound total shifts with size. Set the size selector to match the onions you actually have before trusting a per-pound count, since the same weight in pounds maps to a different number of whole onions at each size. Open onion converter
Which onion variety should I use?: For everyday cooking, soups, and caramelising, a yellow / brown onion is the default, with the most balanced flavour. For raw use in salads, salsa, or pickling, a red or sweet (Vidalia / Walla Walla) onion is milder. White onions suit Mexican dishes; shallots are the delicate choice for dressings and pan sauces.
How many onions are in a pound?: About 4 medium onions make up a pound, since a pound is 454 g and a medium onion weighs 110 g. Smaller onions push that to roughly 6, and large ones drop it to about 3. The converter runs both ways, so enter any weight in pounds and read off the whole-onion count for the size you have.

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