Spring Onion converter: whole spring onions, cups, grams
Spring Onion converter
A recipe says two spring onions or a quarter cup sliced but you're not sure how many stalks to trim. A medium spring onion stalk weighs about 15 g. Convert between whole stalks and sliced cups, grams, or ounces to prep exactly what you need.
Spring onion size ranges from a slim 10 g stalk to a plump 25 g one (2.5 times the weight). Setting the size below keeps three spring onions consistent whether you have spindly salad onions or fat bunching onions.
How much does a spring onion weigh?
A medium, or average, spring onion weighs about 15 g, with a small one around 10 g and a large one around 25 g.
Out of spring onion? See spring onion substitutes →
Need a stronger onion flavour? Standard onions (70–150 g) are larger with bold, layered sweetness. See our Onion converter.
Shallots (20–60 g) are more delicate than spring onions and better suited to dressings and pan sauces. See our Shallot converter.
Enter an amount, pick your units, and set the size for counting whole spring onions.
Result
0.15 cupsCommon Spring Onion conversions
Quick reference for spring onion at medium size. Switch the size in the converter above for small or large.
| spring onions | Cups (chopped) |
|---|---|
| 1 spring onion | 0.15 cups |
| 2 spring onions | 0.3 cups |
| 3 spring onions | 0.45 cups |
| 4 spring onions | 0.6 cups |
| 5 spring onions | 0.75 cups |
| 6 spring onions | 0.9 cups |
Spring Onion conversion chart
The chart below shows how whole spring onions (medium size) convert to cups, grams and ounces.
| spring onions | cups | cups (US) | g | oz | lb | kg |
|---|---|---|---|---|---|---|
| 1 spring onion | 0.15 cups | 0.16 cups (US) | 15 g | 0.53 oz | 0.03 lb | 0.02 kg |
| 2 spring onions | 0.3 cups | 0.31 cups (US) | 30 g | 1.06 oz | 0.07 lb | 0.03 kg |
| 3 spring onions | 0.45 cups | 0.47 cups (US) | 45 g | 1.59 oz | 0.1 lb | 0.05 kg |
| 4 spring onions | 0.6 cups | 0.63 cups (US) | 60 g | 2.12 oz | 0.13 lb | 0.06 kg |
| 5 spring onions | 0.75 cups | 0.78 cups (US) | 75 g | 2.65 oz | 0.17 lb | 0.08 kg |
Spring 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 spring onion varieties compare.
| Variety | Best for |
|---|---|
| Scallion (green onion) | All-purpose use raw or cooked: mild, crisp, and fresh; the standard supermarket spring onion. |
| Welsh onion (negi) | Stir-fries and cooked dishes: more pungent and heat-tolerant than common scallions. |
| Bunching onion | Asian dishes and pickling: slightly bulbous base, bold flavour, very versatile. |
Which should I pick?
For most recipes (stir-fries, salads, soups, and garnishes) a standard scallion (green onion) is the default: mild, fresh, and edible from root to tip. Welsh onions are more pungent and hold up better to heat; use them when you want stronger flavour in cooked dishes. Bunching onions have a slightly bulbous base and bolder flavour: the everyday choice in many Asian cuisines.
Frequently Asked Questions
- What is the size of a medium spring onion?
- A medium spring onion weighs about 15 g, which works out to roughly 0.15 cups (0.16 US cups) of chopped flesh. Spring onions come in a range of sizes depending on the season, variety and where they were grown, so weight and cup figures shift accordingly. Use the size selector above to match what you actually have, then read the exact conversion for any amount.
- How much does a medium spring onion weigh?
- A medium spring onion weighs about 15 g, with a small one around 10 g and a large one near 25 g. That range changes the weight of any recipe that counts spring onions by the piece, so set the size selector to match what you actually have before trusting a cup or gram figure.
- How much does an average spring onion weigh?
- An average spring onion is the same as a medium one: about 15 g. A small spring onion is lighter at around 10 g and a large one heavier at about 25 g, so the size you actually have changes the total for any recipe that counts spring onions by the piece rather than by weight.
- Which spring onion variety should I use?
- For most recipes (stir-fries, salads, soups, and garnishes) a standard scallion (green onion) is the default: mild, fresh, and edible from root to tip. Welsh onions are more pungent and hold up better to heat; use them when you want stronger flavour in cooked dishes. Bunching onions have a slightly bulbous base and bolder flavour: the everyday choice in many Asian cuisines.
- How much does a large spring onion weigh?
- A large spring onion weighs about 25 g, noticeably more than a medium, or average, one at 15 g or a small one at 10 g. Set the size selector to large to convert cups, grams and ounces for the bigger spring onions you actually have on the counter.
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