A kilogram of powdered milk holds about 8.3 cups. That is the short answer: one cup weighs about 120 g spooned and levelled, and 1,000 divided by 120 is 8.3. The rest of this page is about using that number properly — when it is reliable, when it drifts, and how a kilogram of powdered milk actually behaves in real recipes. Powdered milk is the one dairy product that is genuinely bought by the kilogram, and the cup question matters because recipes call for it by the cup while the bag is labelled in grams. A kilogram of powder reconstitutes into many litres of milk, so a small cup error is magnified across a whole batch of bread or hot chocolate. The figure here is for nonfat dry milk powder, spooned and levelled.

That 8.3-cup figure is the one to remember, and it is worth knowing what sits behind it. Powdered Milk is used for baking, bread machines, hot chocolate and camping food, and in all of those jobs the recipe usually talks in cups while the shop sells by the kilogram. Nonfat dry milk powder; reconstitutes with water. The source for the cup weight is USDA, with medium confidence in the figure, and the method is spooned and levelled — spoon the ingredient into the cup and level it off, rather than scooping from the bag, which packs it down and adds weight. If you scoop, the same cup can hold noticeably more, and your 8.3-cup kilogram quietly becomes fewer cups than you counted on.

The conversion table

All figures below are computed from the same cup weight — one cup of powdered milk is 120 g spooned and levelled — so the table is internally consistent. Grams are rounded to the nearest gram and cups to one decimal place; both are approximate.

Amount Cups Grams
100 g 0.8 cups 100 g
250 g (quarter kilogram) 2.1 cups 250 g
500 g (half kilogram) 4.2 cups 500 g
750 g 6.2 cups 750 g
1 kg 8.3 cups 1000 g
1.5 kg 12.5 cups 1500 g
2 kg 16.7 cups 2000 g
5 kg 41.7 cups 5000 g
Cups Grams
1/4 cups 30 g
1/2 cups 60 g
3/4 cups 90 g
1 cup 120 g
1.5 cups 180 g
2 cups 240 g
3 cups 360 g
4 cups 480 g
5 cups 600 g
8 cups 960 g
10 cups 1200 g

A kilogram is also 2.20462 pounds, and a pound of powdered milk is about 3.8 cups (454 g divided by 120 g per cup), so the kilogram figure of 8.3 cups is a little more than twice the pound figure. A tablespoon of powdered milk weighs about 7.5 g and a teaspoon about 2.5 g, which is useful when a recipe calls for a spoonful rather than a cupful — though for spoon measures the scale is still the safer tool when the amount is small and the recipe is sensitive.

Worked example 1: buying a kilogram bag

Suppose you buy a 1 kg bag of powdered milk for a bakery batch of milk bread. The bag holds about 8.3 cups, and if each batch needs 1 cup — 120 g — the bag covers about 8.3 batches. In practice you will lose a little to spillage and to the last spoonfuls that cling to the bag, so plan on 8 full batches and treat the remainder as a bonus. This is the calculation that tells you whether the bulk bag is actually a bargain: divide the price of the bag by 8.3 and you have the cost per batch, which you can compare honestly with the smaller bag on the shelf.

Worked example 2: a recipe written in cups

Now take the recipe the other way round. You are making a large pot of hot chocolate and the recipe calls for 0.5 cups of powdered milk. That is 60 g, so if your scale reads in grams you can weigh it directly and skip the cup entirely. If you are doubling the recipe, you need 1 cups, which is 120 g; tripled, it is 1.5 cups or 180 g. And if you only have the kilogram bag and no smaller measure, remember that 0.5 cups is about 6.0 percent of the bag — a useful sense-check when you are pouring from a large bag into a bowl and wondering whether you have taken too much.

Worked example 3: using up a half kilogram

A half kilogram — 500 g — of powdered milk is about 4.2 cups. If you are a week's worth of bread-machine loaves, and each serving or batch takes 2 cups (240 g), a half-kilogram pack gives you about 2.1 of them. A quarter kilogram, 250 g, is about 2.1 cups, and 100 g — the smallest pack size you will commonly see — is about 0.8 cups. Working from the bag downwards like this stops the most common bulk-buy mistake: opening a kilogram bag for a recipe that needs a quarter of it, and then storing the rest badly because there was no plan for it.

Method and source

The cup weight used on this page is 120 g per cup, measured spooned and levelled, from USDA. Confidence is rated medium: the figure comes from USDA data for this ingredient and is a sound average, but individual brands and grinds vary a little. The method matters as much as the number. Spooning and levelling means spooning the ingredient into the measuring cup until it is heaped, then sweeping a knife across the top; scooping the cup through the bag compresses the ingredient and can add 10 to 20 percent to the weight. For a poured ingredient the figure is for the ingredient poured into the cup without packing. Every cup result on this page is therefore labelled approximate, and the honest advice is to verify with a kitchen scale whenever the recipe matters — a scale that reads grams costs little and removes the whole problem.

Practical guidance

Keep powdered milk sealed, cool and dry — it clumps the moment it meets damp, and clumped powder does not dissolve properly. Measure it with a dry cup, spooned and levelled, and whisk it into the dry ingredients before adding water for the smoothest result. Reconstituted milk should be treated like fresh milk: refrigerate it and use it within a day or two.

Storage for a kilogram of powdered milk deserves a sentence of its own: Airtight container, cool and dry, up to 1 year. A kilogram is a lot to store badly, so decant it into a sealed container as soon as the bag is opened, label it with the date, and keep the container where you will actually see it — ingredients hidden at the back of a cupboard are the ones that go stale unnoticed. If you buy in bulk to save money, the saving only survives if the second half of the bag is as fresh as the first when you reach it.

The most common mistake with kilogram-to-cup conversions is treating the cup as if it were a weight. It is not: a cup of water weighs 237 g, a cup of flour weighs 120 g, and a cup of shredded coconut weighs 85 g, all in the same cup. The cup measures volume, the kilogram measures weight, and the ingredient's density is the only bridge between them. That is why this site gives a different cup figure for every ingredient, and why a conversion you memorised for one ingredient will be wrong for the next. Keep the scale on the bench, use the cup figures as a planning tool, and weigh the ingredient when the recipe's success depends on the amount.

Frequently asked questions

How many cups are in 1 kg of powdered milk?

There are about 8.3 cups in a kilogram of powdered milk. One cup weighs about 120 g spooned and levelled, so 1,000 g divided by 120 g gives 8.3 cups. The figure is approximate: how you fill the cup changes the weight, so verify with a kitchen scale when it matters.

How many grams is 1 cup of powdered milk?

One cup of powdered milk weighs about 120 g, measured spooned and levelled, according to USDA (medium confidence). A tablespoon is about 7.5 g and a teaspoon about 2.5 g.

How many cups are in 500 g of powdered milk?

There are about 4.2 cups in 500 g of powdered milk — half the kilogram figure, since 500 g is half a kilogram. A quarter kilogram (250 g) is about 2.1 cups, and 100 g is about 0.8 cups.

How much liquid milk does a cup of powdered milk make?

That depends on the brand's reconstitution ratio, which is printed on the bag — typically about 1 cup of powder plus water to make roughly 1 litre of milk, but the ratio varies. The figure on this page tells you the weight of the powder itself: one cup weighs about 120 g, and a kilogram holds about 8.3 cups. Follow the bag for the water ratio, not this page.

How should I store a kilogram of powdered milk?

Airtight container, cool and dry, up to 1 year. Keep the bulk of the bag sealed and decant a working amount into a smaller jar, so the main supply is opened as rarely as possible.

Is the cup figure exact, or should I weigh it?

It is approximate. The cup weight of 120 g is a published average for powdered milk spooned and levelled, and real cups vary with brand, grind, humidity and how you fill the cup. For everyday cooking the cup figure is fine; for baking, for costing a recipe, or for any recipe where the amount is critical, weigh the ingredient on a kitchen scale and use the cup figure only to plan.

Related links