Kitchen Measurement Conversions: Cups, Grams, Tablespoons, and More

Last Tuesday I was halfway through a peanut butter cookie recipe from an American food blog when I hit the line “3/4 cup peanut butter.” I stood there holding a measuring jug, a tablespoon, and a look of mild panic. Is that the same as a UK cup? How many tablespoons is three-quarters of a cup? Should I just weigh it instead? By the time I’d finished googling, the butter I’d been softening on the counter had turned into a puddle and my youngest was eating chocolate chips straight from the bag.

If this sounds familiar, you’re not alone. Kitchen measurement conversions trip up everyone — from people following their first recipe to home bakers who’ve been at it for years. The problem isn’t that the maths is hard. It’s that different countries use different systems, volume and weight aren’t the same thing, and recipes cheerfully mix units like it’s no big deal. This guide will sort out the confusion once and for all, with converters you can use right here whenever a recipe throws something unexpected at you.

Why Kitchen Measurements Are So Confusing

The root of the problem is that cooking uses two completely different systems of measurement, and most recipes don’t bother telling you which one they’re using.

Volume measurements — cups, tablespoons, teaspoons, fluid ounces — tell you how much space an ingredient takes up. These are the standard in American and Canadian kitchens. One US cup is 240 millilitres. One tablespoon is 15 millilitres. There are 16 tablespoons in a cup and 3 teaspoons in a tablespoon. Simple enough on paper.

Weight measurements — grams, ounces, kilograms — tell you how heavy an ingredient is. This is standard in the UK, Europe, Australia, and most professional kitchens worldwide. Weight is more precise because it doesn’t depend on how you scoop or pack an ingredient.

The headache starts when you try to convert between the two. A cup of flour and a cup of sugar take up the same amount of space, but flour weighs about 125 grams while sugar weighs about 200 grams. Cocoa powder, oats, butter, honey — every ingredient has a different density, which means every ingredient has a different grams-to-cups conversion. There’s no single number that works for everything.

Then there are the regional differences within volume measurements themselves. A US cup is 240 ml, but an Australian cup is 250 ml, and a Japanese cup is 200 ml. US tablespoons are 15 ml, but Australian tablespoons are 20 ml. If you’ve ever wondered why an Australian recipe produced something slightly off, that missing 5 ml per tablespoon across an entire recipe can absolutely be the culprit.

Converting Between Cups, Tablespoons, Teaspoons, and Millilitres

Before we get into the grams question, let’s sort out the volume conversions that come up constantly in everyday cooking. These are the ones I use most often — when a recipe says “half a cup” and I want to know how many tablespoons that is (eight, by the way), or when I’m converting an American recipe’s “fluid ounces” into something my metric measuring jug can handle.

Here are the relationships worth committing to memory:

• 1 cup = 16 tablespoons = 48 teaspoons = 240 ml
• 1 tablespoon = 3 teaspoons = 15 ml
• 1/4 cup = 4 tablespoons
• 1/3 cup = 5 tablespoons + 1 teaspoon
• 1/2 cup = 8 tablespoons
• 3/4 cup = 12 tablespoons

But honestly, I don’t expect anyone to memorise all of that. I certainly haven’t — and I cook every single day. That’s why I keep a converter handy.

Use the Cooking Volume Converter to switch between cups, tablespoons, teaspoons, fluid ounces, and millilitres:

This is particularly useful when you’re halving or doubling a recipe and the fractions get awkward. Trying to figure out what half of 3/4 cup is while your onions are browning is not a fun time. (It’s 6 tablespoons, or 90 ml, in case you’re wondering right now.)

Converting Grams to Cups (and Why the Ingredient Matters)

This is where things get properly tricky, and where I see the most mistakes — including plenty of my own. When a British recipe says “200g plain flour” and you want to use your American measuring cups, you need to know that 200 grams of flour is about 1 and 3/5 cups. But 200 grams of sugar? That’s only 1 cup. Same weight, very different volume.

Here are some common ingredient conversions that come up constantly:

• Plain/all-purpose flour: 1 cup = roughly 125g
• Granulated sugar: 1 cup = roughly 200g
• Brown sugar (packed): 1 cup = roughly 220g
• Butter: 1 cup = roughly 227g (that’s two standard sticks in the US)
• Rolled oats: 1 cup = roughly 90g
• Cocoa powder: 1 cup = roughly 85g
• Honey or golden syrup: 1 cup = roughly 340g

The differences are enormous. A cup of honey weighs four times as much as a cup of cocoa powder. This is exactly why professional bakers weigh everything — and why converting between grams and cups without accounting for the specific ingredient leads to baking disasters.

My friend Sarah (lovely woman, terrible at measuring) once substituted “a cup” of cocoa powder by weight when the recipe meant by volume. Her brownies came out so dense and bitter they could have been used as doorstops. We still call them the Doorstop Brownies. She’s since invested in a kitchen scale, which I fully support — but when you’re following a recipe that mixes units, a converter is what you actually need.

Use the Grams to Cups Converter to get ingredient-specific conversions:

Pick your ingredient from the list, enter the gram weight, and you’ll get the equivalent in cups. This takes the guesswork out of converting European and British recipes for American measuring tools — or vice versa.

When You Need Tablespoons Instead of Cups

Not every ingredient comes in cup-sized quantities. Spices, leavening agents, oils, vanilla extract, small quantities of flour for thickening a sauce — these all tend to be measured in tablespoons or teaspoons. And when a recipe gives you a gram weight for a small quantity, converting to tablespoons is often more practical than converting to cups.

This matters more than you’d think. If a recipe calls for 15 grams of baking powder, you need to know that’s about 1 tablespoon — not eyeball it and hope for the best. Too much baking powder and your cake tastes metallic and bitter. Too little and it doesn’t rise. Small measurements, big consequences.

The same applies to things like cocoa powder in a hot chocolate recipe (30 grams is about 3.5 tablespoons), chia seeds for overnight oats (10 grams is about 1.5 tablespoons), or cornflour for thickening gravy (8 grams is about 1 tablespoon).

Use the Grams to Tablespoons Converter for these smaller quantities:

Tips for Getting Measurements Right Every Time

After years of cooking for a household that includes three children with strong opinions about whether dinner is “right” or “weird,” I’ve picked up a few habits that save a lot of grief:

Invest in a digital kitchen scale. Yes, even if you’re mostly a cups-and-tablespoons person. Scales cost less than a bag of decent coffee and they last for years. Whenever you have the option, weighing ingredients in grams is more accurate than measuring by volume — especially for baking. It’s faster too, because you can weigh directly into the bowl without dirtying six different measuring cups.

Level your dry measurements. When you scoop flour or sugar into a measuring cup, scrape a straight edge (a knife or the back of a spatula) across the top to level it off. A heaped cup of flour can contain 30 to 40 grams more than a levelled one. Over an entire recipe, that’s enough extra flour to make your cake dry and heavy.

Don’t measure sticky ingredients in dry cups. Honey, treacle, golden syrup, peanut butter — these all cling to dry measuring cups and you lose a chunk of the ingredient to the cup itself. If you must use volume, spray the inside of the cup with a tiny bit of oil first and the sticky stuff slides right out. Or better yet, weigh it.

Know your spoon sizes. A “tablespoon” in a recipe means a proper measuring tablespoon (15 ml), not whatever spoon you eat cereal with. Similarly, a “teaspoon” is 5 ml — your actual teaspoons at home are probably bigger or smaller. This catches people out with baking powder, salt, and spices where precision matters.

Keep a conversion cheat sheet on your fridge. I’ve got a little card stuck to my fridge with the conversions I use most often: cups to grams for flour and sugar, tablespoons per cup, and oven temperature conversions. For everything else, I use the tools above. It sounds old-fashioned, but when your hands are covered in dough, tapping a phone screen isn’t ideal — and a laminated card doesn’t mind getting flour on it.

Stop Guessing, Start Converting

Kitchen measurement confusion is one of those problems that’s genuinely easy to solve once you have the right tools. You don’t need to memorise every conversion — you just need to know that cups and grams aren’t interchangeable, that every ingredient converts differently, and that a quick check before you start cooking is worth more than a failed recipe and a wasted evening.

The converters above will handle the maths for you. Bookmark this page, stick it in your recipe folder, or just remember it’s here next time a recipe asks for something in units you don’t recognise. Your cookies, cakes, and weeknight dinners will thank you — and you’ll never have to stand in the kitchen googling “how many tablespoons in 3/4 cup” with butter melting on the counter again.