How Much Soup Per Person? A Portion Planning Guide

Plan on about 1 cup (240 ml) of soup per person for a starter and 1½ to 2 cups (355–475 ml) for a main course; hearty soups or guests without many sides may need closer to 2½ cups (590 ml). This flexible vegetable-and-white-bean soup makes a filling example batch for six, and the portion guide below helps you scale any soup for a meal or gathering.

Ingredients

2 tablespoons olive oil (30 ml)
1 medium yellow onion, diced (about 1 cup or 150 g)
2 medium carrots, diced (about 1 cup or 150 g)
2 celery ribs, diced (about 1 cup or 100 g)
3 garlic cloves, minced (about 9 g)
2 medium potatoes, cut into ½-inch (1.3 cm) pieces (about 300 g)
1 teaspoon dried thyme (about 1 g)
1 bay leaf
7 cups low-sodium vegetable broth (1.65 L)
1 can diced tomatoes, 14.5 ounces (411 g)
2 cans white beans, 15 ounces (425 g) each, drained and rinsed; about 3 cups (510 g) beans total
1 teaspoon fine salt (6 g), or less if the broth is salted
½ teaspoon black pepper (about 1 g)
3 cups chopped kale, packed loosely (about 90 g)
1 tablespoon lemon juice (15 ml)

Instructions

Prepare the vegetables: dice the onion, carrots, celery, and potatoes, mince the garlic, and chop the kale. Drain and rinse the beans. Doing this before heating the pot keeps the cooking stage moving smoothly.
Warm the olive oil in a large, heavy pot or Dutch oven over medium heat. Add the onion, carrots, and celery. Cook for 8 minutes, stirring every minute or two, until the onion is soft and the other vegetables have begun to soften. If the bottom starts to brown before the vegetables soften, lower the heat slightly.
Stir in the garlic and dried thyme and cook for 30 seconds, just until fragrant. Add the potatoes, bay leaf, broth, diced tomatoes with their juices, beans, salt, and pepper. Stir well and bring the pot to a gentle boil.
Lower the heat so the soup simmers steadily, then cover the pot with the lid slightly ajar. Simmer for 25 minutes, stirring once or twice, until the potatoes are tender when pierced with a fork. Avoid a hard boil, which can break up the potatoes and make the broth evaporate faster than intended.
Stir in the kale and simmer for 2 minutes, until it has wilted but is still green. Remove the bay leaf, turn off the heat, and stir in the lemon juice. Taste the broth and adjust the salt, pepper, or lemon. Ladle into six bowls; the finished yield is roughly 12 cups (2.8 L), or about 2 cups per person, though the exact volume varies with evaporation and the size of the vegetables.

Tips

Choose the serving amount by the meal. A starter portion is usually ¾ to 1 cup (180–240 ml), especially before a substantial main course. For soup as the main dish, allow 1½ to 2 cups (355–475 ml) per adult, then add bread, salad, or another side. A thick bean, lentil, or chowder-style soup is more filling than a thin broth, so you can often plan toward the lower end when it has generous solids.

Calculate for the whole table before filling bowls. Multiply the portion by the number of guests: for 10 people, plan 10 cups (2.4 L) for starter servings or 15–20 cups (3.6–4.7 L) for main-course servings. For a buffet, potluck, or group with unknown appetites, make roughly 10–15% extra if you have room; people may take seconds, and ladle sizes are rarely perfectly consistent. A 1-cup ladle makes it easier to track servings.

Use the broth and salt thoughtfully. Low-sodium broth gives you room to season at the end. If using regular broth, begin with less salt than listed, taste after the soup simmers, and add more only if it needs it. If the soup becomes too thick, add warm broth or water a little at a time; if it tastes diluted, simmer it uncovered briefly and taste again before adding salt.

Swap greens without changing the plan. Spinach can replace kale; add it at the very end and stir just until wilted. Swiss chard works too, but give its chopped stems a few minutes in the pot before adding the leaves. Frozen greens can be used from frozen, though they may release extra water and make the soup slightly less vibrant.

Serving Suggestions

Serve this soup hot in bowls that hold at least 2 cups (475 ml), leaving room to carry them safely. Crusty bread, toast, or a simple green salad makes a practical accompaniment when soup is the main course. For a lighter first course, portion about 1 cup (240 ml) into smaller bowls and serve it before a larger meal. A little grated Parmesan, chopped parsley, or extra black pepper can be offered at the table, but the soup is complete without garnishes.

For a casual group meal, set out the pot with a ladle and keep a clear note of how many portions the batch is meant to provide. If several dishes are being served buffet-style, people generally take smaller amounts of each, so estimate closer to 1 cup (240 ml) of soup per person. If soup is the only substantial dish, use the 1½-to-2-cup main-course range and keep extra warm in a separate pot rather than topping up a serving dish repeatedly.

Variations

Make it more filling: Stir in cooked pasta or cooked rice near the end, allowing enough time for it to heat through. Add extra broth as needed because grains and pasta absorb liquid as they sit. For a different bean flavor, use cannellini, great northern, or navy beans; these are easy-to-find alternatives to specialty white beans and keep the soup’s mild, creamy texture.

Change the vegetables: Replace the potatoes with 2 cups (about 300 g) of diced butternut squash, or use a mixture of potatoes and squash. Add quick-cooking vegetables such as peas during the last few minutes so they do not turn mushy. For a more tomato-forward flavor, use a second can of diced tomatoes and reduce the broth by about 1 cup (240 ml); the result will be thicker and tangier.

Adjust the seasoning: Add ½ teaspoon smoked paprika (about 1 g) with the thyme for a smoky note, or stir in a pinch of red pepper flakes for gentle heat. A Parmesan rind can simmer in the broth for savory depth; remove it before serving. For a dairy-free version, simply leave it out. If using fresh thyme instead of dried, use about 1 tablespoon (3 g) of leaves.

Storage and Reheating

Refrigerate leftover soup within 2 hours of cooking. Divide a large batch into shallow, covered containers so it cools more quickly, and keep it refrigerated for 3–4 days. The potatoes and beans may absorb broth while stored, so loosen each portion with a splash of water or broth before reheating. The flavor often becomes more blended overnight, but the kale will soften further.

Reheat only the amount you plan to eat, either in a saucepan over medium heat or in a microwave-safe bowl, stirring occasionally so it heats evenly. USDA FSIS guidance is to reheat leftovers to 165°F (74°C); check the center with a food thermometer. If reheating on the stove, bring the soup to a steady simmer while stirring, then verify the temperature rather than relying only on steam. Freeze soup in meal-size containers for up to 2–3 months for best quality. Leave a little headspace for expansion, thaw in the refrigerator, and reheat to 165°F (74°C); potatoes may become softer after freezing.

Frequently Asked Questions

How many cups of soup should I make for each person?
For a starter, plan about 1 cup (240 ml) per person. For a main course, allow 1½ to 2 cups (355–475 ml); choose 2 to 2½ cups (475–590 ml) for a hearty appetite, a thick soup, or a meal with few sides. These are planning estimates, not rigid serving rules.

How much soup do I need for 12 people?
For a first course, 12 cups (2.8 L) is a sensible starting amount. For a main meal, plan 18–24 cups (4.3–5.7 L), depending on thickness and sides. If you expect seconds or are serving a buffet, add about 10–15% when practical. It is usually easier to keep extra soup warm than to stretch a pot that is already short.

Does a thick soup need a smaller portion than broth?
Often, yes. A bowl of lentil soup, chowder, or bean soup has more substantial ingredients than a clear broth, so 1½ cups (355 ml) may be enough as a main serving when bread or a side is available. A light broth-based soup may call for closer to 2 cups (475 ml). Use the recipe’s yield and the rest of the menu to decide.

How many servings does a gallon of soup provide?
A US gallon is 16 cups (3.8 L). It provides about 16 starter portions at 1 cup each, or 8–10 main-course portions at 1½ to 2 cups each. For a thick soup or a crowd that may take seconds, plan fewer servings from the same volume.

What size pot do I need for soup for six?
This recipe makes roughly 12 cups (2.8 L), but the ingredients need space to stir and simmer. A pot of at least 6 quarts (5.7 L) is a comfortable choice. When scaling up, do not fill a pot to the rim; use a second pot if needed so the soup can simmer without spilling.

Can I make this soup ahead?
Yes. Cook it, cool it promptly, and refrigerate it in covered containers for 3–4 days. For the freshest texture, you can also cook the soup through the potato step, chill it safely, and add the kale while reheating. Stir in the lemon juice after reheating so its bright flavor remains noticeable.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).