Fennel converter: whole fennel bulbs, cups, grams

A recipe says '1 cup sliced fennel' or '1 fennel bulb' but bulbs range from small to large. A medium fennel bulb is about 300 g, so the count shifts as size changes. This converter moves between whole fennel bulbs, sliced cups, grams, and ounces.

A small fennel bulb is 200 g and a large one 450 g, so 'one bulb' in a braise or salad can swing the result. Pick the right size below to keep roasts, slaws, and soups on target.

How much does a fennel bulb weigh?

A medium, or average, fennel bulb weighs about 300 g, with a small one around 200 g and a large one around 450 g.

Related Fennel Ingredients

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Fennel converter tool

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

Size applies to whole fennel bulbs (small / medium / large).

Result

3.33 cups

Fennel Calculators & Kitchen Tools

Working with fennel? These tools handle the jobs a converter cannot.

  • Recipe Scaler Scale any recipe up or down and keep every ingredient in ratio.

Common Fennel conversions

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

fennel bulbsCups (chopped)
1 fennel bulb3.33 cups
2 fennel bulbs6.67 cups
3 fennel bulbs10 cups
4 fennel bulbs13.33 cups
5 fennel bulbs16.67 cups
6 fennel bulbs20 cups

Fennel conversion chart

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

fennel bulbscupscups (US)gozlbkg
1 fennel bulb3.33 cups3.49 cups (US)300 g10.58 oz0.66 lb0.3 kg
2 fennel bulbs6.67 cups6.98 cups (US)600 g21.16 oz1.32 lb0.6 kg
3 fennel bulbs10 cups10.47 cups (US)900 g31.75 oz1.98 lb0.9 kg
4 fennel bulbs13.33 cups13.95 cups (US)1200 g42.33 oz2.65 lb1.2 kg
5 fennel bulbs16.67 cups17.44 cups (US)1500 g52.91 oz3.31 lb1.5 kg

Fennel 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 fennel varieties compare.

VarietyBest for
Florence (Romanesco)Roasting and salads: large round bulb, crisp and sweetly anise-scented.
Zefa FinoAll-purpose: reliable round bulb that resists bolting, good raw or cooked.
PerfectionBraising and slaws: sweet, tender bulb fennel with a mild aniseed flavour.

Which should I pick?

For roasting, braising, and shaving raw into salads, Florence fennel (the round supermarket bulb) is the one to buy: crisp, anise-scented, and widely stocked. No named variety? Most shops sell it as fennel and it works for any recipe. Romanesco and Zefa Fino are reliable round-bulb types for the garden, and Perfection is another sweet, bolt-resistant bulb fennel.

Frequently Asked Questions

What is the size of a medium fennel bulb?
A medium fennel bulb weighs about 300 g, which works out to roughly 3.33 cups (3.49 US cups) of chopped flesh. Fennel bulbs 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 fennel bulb weigh?
A medium fennel bulb weighs about 300 g, with a small one around 200 g and a large one near 450 g. That range changes the weight of any recipe that counts fennel bulbs 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 fennel bulb weigh?
An average fennel bulb is the same as a medium one: about 300 g. A small fennel bulb is lighter at around 200 g and a large one heavier at about 450 g, so the size you actually have changes the total for any recipe that counts fennel bulbs by the piece rather than by weight.
Which fennel variety should I use?
For roasting, braising, and shaving raw into salads, Florence fennel (the round supermarket bulb) is the one to buy: crisp, anise-scented, and widely stocked. No named variety? Most shops sell it as fennel and it works for any recipe. Romanesco and Zefa Fino are reliable round-bulb types for the garden, and Perfection is another sweet, bolt-resistant bulb fennel.
How much does a large fennel bulb weigh?
A large fennel bulb weighs about 450 g, noticeably more than a medium, or average, one at 300 g or a small one at 200 g. Set the size selector to large to convert cups, grams and ounces for the bigger fennel bulbs you actually have on the counter.

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