1/3 Cup Coconut Milk in Grams
1/3 cup of coconut milk weighs about 80 g (poured, USDA). That is 240 g per cup divided by three. The short answer is at the top, and the rest of this page explains how that number was worked out, when it matters, and what to watch out for when you use it.
Coconut Milk is described in the data as follows: Rich liquid pressed from grated coconut flesh; shake canned coconut milk before using. It is used for curries, soups, smoothies and dairy-free baking. Knowing the weight matters because recipes written in cups assume a particular way of filling the cup, and that assumption is invisible until a bake comes out wrong. A cup of a light, airy ingredient can weigh much less than a cup of a dense one, so converting by volume alone tells you nothing about how much of the ingredient is actually in the bowl. Weighing 80 g of coconut milk removes that guesswork, and it makes the recipe repeatable: the same weight gives the same result next week, in a different kitchen, with a different set of cups.
The one-third cup is a particularly useful measure because it sits at the centre of the usual scaling steps. Halve two-thirds of a cup and you get one-third. Double one-third and you get two-thirds. Add one-third to two-thirds and you have a full cup. Recipes written for two people, test batches, and scaled-down bakes use it constantly, which is why it deserves its own page rather than a passing mention in a table.
Conversion table for coconut milk
| Amount | Grams (approx.) |
|---|---|
| 1/4 cup | 60 g |
| 1/3 cup | 80 g |
| 1/2 cup | 120 g |
| 2/3 cup | 160 g |
| 3/4 cup | 180 g |
| 1 cup | 240 g |
| 1 1/3 cups | 320 g |
| 2 cups | 480 g |
Every figure in this table is calculated from the same base value — 240 g per cup, poured, from USDA — multiplied or divided by the fraction shown. No other source was used, and no figure was guessed. If you need an amount that is not in the table, divide 240 g by the denominator of your fraction, or multiply 80 g by the number of third-cups you need: three third-cups make a cup, so three lots of 80 g should add up to about 240 g, which is a useful check that your arithmetic and your scale agree.
How to measure one-third of a cup of coconut milk
A cup is a volume, and grams are a weight, so every conversion on this page depends on how the cup was filled. The method given in the data is the method you should copy. The reference method for coconut milk is poured. For a dry ingredient that means spooning it into the measure and levelling the top with the back of a knife, rather than scooping the cup through the bag, which packs it down and adds weight. For a poured ingredient it means pouring to the line and reading the level at eye level. For a scooped ingredient it means pressing it into the measure so there are no air pockets. Copying the method is what makes the 80 g figure true; changing the method changes the weight, sometimes by a lot.
A kitchen scale is the simplest way to get this right. Put a bowl on the scale, press tare to zero it, and add coconut milk until the display reads 80 g. That is the whole technique, and it takes less time than finding the right measuring cup. If you do not have a scale, use a proper one-third cup measure rather than estimating a third of a larger cup, and level it carefully. Shaking the cup to settle the contents, tapping it on the bench, or heaping it above the rim all change the weight, and with a light ingredient those changes are a large share of the total.
The most common mistake is treating all cups as equal. A US cup is the standard used throughout this page and in the USDA data, and it is the cup most English-language recipes mean. If your recipe comes from a country that uses metric cups or imperial measures, check which cup it means before converting, because a different cup size changes every figure on this page. The second most common mistake is measuring a dry ingredient in a liquid jug or a liquid in a dry cup: the two are designed differently, and using the wrong one adds a systematic error to every measurement.
Worked examples
A soup or curry that calls for two-thirds of a cup
Imagine a curry or soup recipe that lists two-thirds of a cup of coconut milk. That is simply two lots of the amount on this page, so about 160 g. If you are cooking from a recipe written in cups and you only have a scale, pour coconut milk into a jug on the scale until it reads 160 g, then tip it in. Weighing a liquid like this is actually more reliable than reading a measuring jug at eye level, especially when the jug is sitting on a crowded worktop and the liquid is opaque, as coconut milk often is. If the recipe is for a single pot serving four people and you decide to cook for eight, double it to one and one-third cups, about 320 g, and check the seasoning again at the end, because doubling a liquid does not always mean doubling the salt or the spices that go with it.
Halving a recipe that needs two-thirds of a cup
Halving works the other way. A recipe calling for two-thirds of a cup of coconut milk becomes one-third of a cup when halved, which is the 80 g figure at the top of this page. This is one of the reasons the one-third cup measure is so common in recipes written for two people: it is exactly half of two-thirds, and it is also a third of a whole cup, so it sits neatly in the middle of the usual scaling steps. Weigh the 80 g, add it, and taste before you decide whether the dish needs more. With liquids you can always add a splash more, but you cannot take it back once it is in the pan.
Batch cooking and storing the rest
If you open a carton or tin of coconut milk and only need one-third of a cup, the rest should not sit in the fridge in the opened tin. Decant what is left into a clean container, label it with the date, and use it within the time given in the storage notes below. Knowing that one-third of a cup is 80 g also helps you divide a whole carton fairly: if a carton holds roughly a cup and a half, that is about four and a half lots of 80 g, so you can plan three or four recipes from one carton instead of opening a fresh one each time.
Method, source, and why the figure is approximate
The base figure for coconut milk is 240 g per cup, measured poured and sourced from USDA. That pairing of method and source is the whole basis of this page: the weight only means something when you know how the cup was filled and who measured it. A cup of coconut milk that is scooped, packed, sifted, or shaken will weigh something different, and a source that rounds its figures will give a slightly different number from one that does not.
All density-based results on this page are labelled approximate, and they should be treated that way. The honest way to use them is as a starting point for everyday cooking and as a precise-enough guide for most baking, with a kitchen scale as the final check whenever the result matters — a cake for a celebration, a loaf you are selling, a batch you are preserving, or any recipe you plan to repeat. If your own weighing disagrees with the table by a gram or two, trust your scale: it is measuring your ingredient, in your kitchen, today.
It is also worth knowing what this page does not do. It does not claim that every brand of coconut milk weighs exactly 240 g per cup, because brands differ in grind, moisture, and packing. It does not convert other ingredients, and it does not invent a figure for an ingredient that is not in the data. If you need a different ingredient, use its own page, where the same method and the same source discipline apply.
Practical guidance: when this conversion matters most
This conversion matters most when coconut milk is doing structural work in a recipe rather than just adding flavour. In baking, the ratio of dry ingredients to liquid decides whether a cake rises and sets or sinks and stays wet in the middle, and a third of a cup is a large enough amount for a measuring error to change that ratio. In a spice blend or a seasoning mix, the same third of a cup may be the difference between a dish that is balanced and one that is dominated by a single flavour. In batch cooking, small errors multiply: if you are off by a few grams per third-cup and you use four third-cups, the error is four times as large.
When you do not have a scale, the best fallback is to measure carefully with cups and to keep the rest of the recipe consistent: if you measured coconut milk by volume, measure the other dry ingredients by volume too, rather than mixing weighed and cup-measured ingredients in the same bowl. Mixing methods mixes two different kinds of error, and the result is harder to diagnose when something goes wrong. If a bake fails and you measured by volume, the first thing to check is whether the cup was filled the way the recipe assumed — spooned and levelled, packed, or poured — because that is the most common cause of a dry or wet crumb.
A practical habit that costs nothing is to write the gram weight on the recipe the first time you weigh an ingredient. Next time you will not need this page at all for that recipe, and you will have a record of what actually worked in your kitchen. Over time those notes become a personal conversion table that is more accurate for your brands and your equipment than any published table, because it was measured where you cook.
Storage and uses
Refrigerate after opening; use within 3 days. Coconut Milk is used for curries, soups, smoothies and dairy-free baking. Storage matters for conversion accuracy as well as for freshness: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, and one that has dried out weighs less. Keeping coconut milk in the conditions described in the storage notes — an airtight container, in the right place, for no longer than the keeping time — keeps its weight per cup close to the published figure, which keeps this page accurate for you. If a packet has been open for months in a humid kitchen, weigh it rather than trusting the cup, and replace it if it smells stale, has clumped hard, or shows any sign of spoilage.
Frequently asked questions
How many grams is 1/3 cup of coconut milk?
About 80 g, poured, according to USDA. That comes from 240 g per cup divided by three. The figure is approximate — coconut milk varies a little by brand, grind, and moisture — so verify with a kitchen scale when the amount matters, for example in baking or when you are scaling a recipe.
Is 80 g exact?
No. It is an approximate conversion. A cup measures volume and a gram measures weight, so the true weight of one-third of a cup of coconut milk depends on how it was measured, how settled it is, and its moisture content. The 240 g per cup figure from USDA is the best available reference, and 80 g is that figure divided by three. For everyday cooking the approximation is fine; for precise baking, weigh the ingredient and trust the scale.
How do I measure 1/3 cup of coconut milk without a scale?
Use a one-third cup measure if you have one, and fill it the way the data specifies: poured. If you only have a one-cup measure, fill it to the one-third mark, or fill a half-cup measure two-thirds full — though that is harder to judge by eye. Level the top with a straight edge for dry ingredients, and read liquids at eye level. A scale is more accurate, and a basic kitchen scale costs less than a set of measuring cups.
How many grams is 2/3 cup of coconut milk?
About 160 g — double the one-third cup figure of 80 g. Two-thirds of a cup is the amount that appears most often alongside one-third of a cup in recipes, because halving two-thirds gives one-third and doubling one-third gives two-thirds. Weigh it as two lots of 80 g if you want to check your work as you go.
Can I use this conversion for a different brand of coconut milk?
Yes, as a starting point, but expect small differences. Different brands grind, dry, and pack coconut milk slightly differently, and those differences change how much fits in a cup. The USDA figure of 240 g per cup is a representative value, not a guarantee for every packet. If a recipe is sensitive — a cake, a loaf, or a preserved batch — weigh your own brand once and note the result for next time.