These days, Australian recipes are written using the metric system, so all you need is a set of scales. Unfortunately, when trying to use recipes from the United States or some other countries, things are a lot more confusing. Cup measurements can easily get lost in translation, so make sure to read these helpful tips before you start a recipe.
How to convert cups to grams
When you use an old-fashioned Australian recipe written in pounds and ounces, conversion is a breeze. Unfortunately, converting cups to grams really isn't that simple. That's because a cup is a measurement of volume, while a gram is a measurement of weight. Think about it like this: 100g of flour and 100g of meat weigh the same. However, meat is very dense, so it takes up a small amount of space. Flour is not dense and takes up a lot more space. In other words, if you look at both quantities in a cup, they would look quite different: 100g of minced meat takes up about 40% of a cup, while 100g of flour takes up around 75%.
As such, when you convert cups to grams, you need to convert every ingredient separately — and yes, that means every ingredient. Granulated sugar, caster sugar, soft brown sugar and icing sugar all have different densities. If you're baking, you'll need to find the correct cup measurement for each one, or risk ruining the cake.
Top tip: If you like to use a lot of American recipes written with cups, the easiest thing to do is buy yourself a set of measuring cups. They're not expensive and easily available online, and they could save you a lot of time spent working out maths.
Different kinds of cups
To make matters even more confusing, not all cups are created equally! Nowadays, most recipes that you see using cups will come from the United States. However, older Australian recipes (as well as British recipes) often use cups, too — and each country's cups have a different volume:
- American cup: 237ml
- Australian cup: 250ml
- British cup: 225ml
Cups to grams for flour, sugar and more
Here are some of the most common conversions to help you with baking or grain recipes. These are all based on US cups, and they are approximate:
- Butter: 1 cup = 215g
- Flour: 1 cup = 125g
- Caster sugar: 1 cup = 180g
- Soft brown sugar: 1 cup = 220g
- Porridge oats: 1 cup = 85g
- Long grain rice, such as basmati: 1 cup = 200g
- Short grain rice, like you'd use in a mushroom risotto: 1 cup = 210g
- Couscous: 1 cup = 150g
How to use a measuring cup
Sometimes, the easiest thing to do is buy a set of measuring cups rather than waste time and energy on conversions. However, you still need to make sure that you're using the cup correctly:
- Before scooping ingredients like flour or sugar, stir them briefly with a fork or spoon. This will aerate them and break up clumps, ensuring you get the right amount in your cup.
- Scoop the ingredient into your cup until it's slightly overflowing.
- With a knife, level off the cup so it's filled exactly to the brim. Now you have the correct amount of your ingredient.
Buying a set of measuring cups is a good idea if you’re a keen baker, whether you use vintage recipes from the UK and Australia or follow American recipes. If you're more into savoury cooking, you might not need a set. Most high-protein meals and seafood recipes can be measured roughly, while baked goods require accuracy.
How much does converting cups to grams matter?
Converting recipes from cups to grams can be tedious and time-consuming, and you might find yourself wondering if it's really necessary. There are two cases when it is important. Firstly, keen bakers will need accurate conversions. Baking is a precise science, and getting the ratio of ingredients wrong can have disastrous results. If you only use flour in the kitchen when making a white sauce, like in this cauliflower bacon mac 'n' cheese, precise conversions are less important.
Secondly, exact measurements can be helpful if you're a newbie in the kitchen. The more experience you have, the less they matter. Once you've been cooking for a while, you can comfortably eyeball the right amounts for dishes like creamy chicken penne.
The golden rule is: if you're converting an ingredient in a recipe, convert everything. Conversions are always somewhat imprecise, so make sure you use the same system of measurements for every ingredient. It's more important to have the correct ratio of ingredients than it is to have exactly the right amounts.
Ready to get baking? Our favourite oven-cooked sweets include lemon loaf & white chocolate ganache, as well as our epic blueberry loaf cake. For something more traditional, use our cups to grams tips to bake these wonderful dessert brownies.
Cups to Grams FAQ
How should I convert cups to grams?
Unfortunately, because cups are a measurement of volume and grams are a measurement of weight, conversion can be tricky. Some more common ingredients converted to US cups are as follows:
- 125g of flour in a cup
- 180g of caster sugar in a cup
- 215g of butter in a cup
How do I convert grams to cups?
Converting grams to cups is difficult because grams measure weight, while cups measure volume. 100g of butter is roughly 1/2 an American cup, 100g of flour is approximately 3/4, and 100g of caster sugar is around 1/2 a cup.
How many grams is 1 cup?
There's no way of saying exactly how many grams are in 1 cup, because grams measure weight and cups measure volume. An exact calculation can be found by dividing the weight of the ingredient by its density x 237. Unless you've got Albert Einstein in your kitchen, you'll have to settle for rough equivalents.
What is 1/2 cup in grams?
It's impossible to say what 1/2 a cup is in grams, because they measure different things. A gram is a measurement of weight, while a cup measures volume. 100g of an ingredient like meat takes up less space than 100g of flour.
Is 1 cup equal to 100g?
No. If you're working from a recipe that uses cups, you will need to look up the conversion rates for every ingredient separately. It will be different for each one, so be careful.