242 g of half-and-half is 1 cup. That is the whole answer: one US cup of half-and-half weighs 242 g (poured, USDA), so 242 g divided by 242 g per cup is exactly 1 cup. All the figures on this page are approximate — half-and-half is a natural product, and how it is measured moves the weight of a cup by a few grams — so when the recipe is delicate, verify with a kitchen scale. For everyday cooking, 1 cup is the number to use.

This page is the reverse of the usual conversion: most recipes list half-and-half in cups and the cook wants grams, but here the recipe, the packet or the scale gives grams and the cook has only cup measures. That happens more often than people expect — imported recipes, nutrition labels, bulk packs and meal-prep plans all speak in grams, while American cup measures are what is actually in the drawer. The conversion is one division, 242 ÷ 242 = 1, and the table below runs the same division for the amounts that come up most often.

242 grams of half-and-half in cups — conversion table

Grams Cups (approx.)
10 g 0.04 (0 cups)
25 g 0.10 (1/8 cups)
50 g 0.21 cups
75 g 0.31 (1/3 cups)
100 g 0.41 cups
125 g 0.52 (1/2 cups)
150 g 0.62 (5/8 cups)
200 g 0.83 cups
250 g 1.03 (1 cup)
300 g 1.24 (1 1/4 cups)
400 g 1.65 (1 2/3 cups)
500 g 2.07 (2 1/8 cups)

Read the table from left to right: find the grams you have, and the cups column tells you how much that is, approximately. A quarter of a cup is 60 g, half a cup is 121 g, and three quarters is 182 g. For amounts between the rows, divide the grams by 242: for example, 182 g is 0.75 (3/4 cups), and 363 g is 1.50 (1 1/2 cups). The same 242 g figure works in the other direction too — multiply cups by 242 to get grams — and the second table runs that calculation for the common cup fractions.

Cups Grams (approx.)
1/4 cup 60 g
1/3 cup 81 g
1/2 cup 121 g
2/3 cup 161 g
3/4 cup 182 g
1 cup 242 g
1 1/2 cups 363 g
2 cups 484 g

A lasagne or pasta bake that needs a weighed tub of cheese

The tub is labelled in grams and the recipe calls for cups. Take the 121 g figure first: 121 g of half-and-half is 0.50 (1/2 cups), because 121 divided by 242 is 0.50. In practice that means a recipe calling for 0.50 (1/2 cups) can be weighed out as 121 g and poured or spooned straight in, with no jug to wash. The habit to build is converting once, writing the cup figure on the recipe, and then cooking from the cups — the scale only comes out for the first batch, and after that the converted recipe is a cup recipe. If the amount is awkward, round to the nearest tablespoon: one tablespoon of half-and-half weighs about 15.1 g, so a couple of spoonfuls either way covers most rounding gaps without anyone noticing in the finished dish.

A cheesecake or dip scaled up for guests

Doubling a recipe that starts from a 250 g tub. Take the 363 g figure first: 363 g of half-and-half is 1.50 (1 1/2 cups), because 363 divided by 242 is 1.50. In practice that means a recipe calling for 1.50 (1 1/2 cups) can be weighed out as 363 g and poured or spooned straight in, with no jug to wash. The habit to build is converting once, writing the cup figure on the recipe, and then cooking from the cups — the scale only comes out for the first batch, and after that the converted recipe is a cup recipe. If the amount is awkward, round to the nearest tablespoon: one tablespoon of half-and-half weighs about 15.1 g, so a couple of spoonfuls either way covers most rounding gaps without anyone noticing in the finished dish.

A breakfast recipe that lists half-and-half or cream in grams

A quiche or sauce where the dairy amount sets the richness. Take the 484 g figure first: 484 g of half-and-half is 2.00 (2 cups), because 484 divided by 242 is 2.00. In practice that means a recipe calling for 2.00 (2 cups) can be weighed out as 484 g and poured or spooned straight in, with no jug to wash. The habit to build is converting once, writing the cup figure on the recipe, and then cooking from the cups — the scale only comes out for the first batch, and after that the converted recipe is a cup recipe. If the amount is awkward, round to the nearest tablespoon: one tablespoon of half-and-half weighs about 15.1 g, so a couple of spoonfuls either way covers most rounding gaps without anyone noticing in the finished dish.

Why grams and cups disagree — and why 242 g is the number to trust

A cup is a volume and a gram is a weight, so the bridge between them is density, and density is a property of the ingredient, not of the recipe. Half-and-Half weighs 242 g per cup because that is how much of it fits in 236.6 ml at the density it actually has. A lighter ingredient needs fewer grams to fill the same cup; a heavier one needs more. There is nothing to memorise here beyond the one number, 242 g, and the one operation, division: grams divided by 242 gives cups, and cups multiplied by 242 gives grams.

The figure comes from USDA, measured poured, which is the method that matters most for this ingredient. Liquids are poured, so the cup is filled to the line and read at eye level. If you have ever wondered why two websites give different answers for the same ingredient, it is usually the method: one site weighed a scooped cup and the other a spooned one, and the two cups are genuinely different weights. Stick to one source, use its method, and the numbers stay consistent from recipe to recipe.

Storing half-and-half so the conversion stays true

Equal parts whole milk and light cream, about 10-12% fat. Refrigerate; use within 1 week of opening. Storage matters for conversion more than most cooks realise: an ingredient that has absorbed moisture, gone stale or clumped weighs more per cup than a fresh one, so a cup measured from a damp bag is not the same as a cup measured from a fresh one. Keeping half-and-half as the producer intended keeps the 242 g figure honest. Coffee, sauces and soups where cream would be too rich.

Frequently asked questions

Should I weigh cheese or measure it in cups?

Weigh it when the recipe is fussy, like a cheesecake or a soufflé. For everyday cooking, cups are fine — just spoon the cheese in and level it off rather than pressing it down.

Does grated cheese weigh the same as a block?

No. A cup of grated cheese has air between the shreds, so it weighs less than the same volume of solid cheese. Always measure cheese in the form the recipe asks for.

How do I measure 242 g of half-and-half without a scale?

Spoon it into a dry measuring cup and level it off to the 1-cup mark. For soft cheeses, a light touch matters: pressing it down packs more in and throws the conversion off.

Can I freeze leftover half-and-half?

Most cheeses freeze reasonably well for cooking, though the texture softens on thawing. Grate or portion it first so you can take out only what you need.

Why is this conversion approximate?

Because half-and-half is a natural product: moisture, fat content and how it is grated or spooned all shift the weight of a cup by a few grams. When the recipe is delicate, verify with a kitchen scale.

Related conversions