From Cups to Grams: A Baker's Guide to Converting Any Recipe
By the Super Simple Digital Tools Team · Updated June 2026
Every baker eventually hits a recipe that refuses to cooperate: it is written in cups when you bake in grams, or in Celsius when your oven thinks in Fahrenheit. The fix is not memorising endless charts but understanding that converting baking measurements means moving between three different things at once, namely volume, weight, and temperature. Each follows its own rules, and once you know which rule applies, any recipe from anywhere becomes usable in your kitchen with whatever tools you happen to own.
Volume-to-volume conversions are the easy ones because they are fixed ratios that never depend on the ingredient. A tablespoon is always 3 teaspoons, a US cup is always 16 tablespoons, and a stick of butter is always half a cup. These hold whether you are measuring water, oil, or molasses, so you can split or combine spoons and cups freely. The catch is that US, UK, and Australian spoons differ slightly, with a US tablespoon near 15 ml and an Australian one at 20 ml, so check which country's recipe you are following.
Volume-to-weight is where most baking failures hide. Converting a cup to grams requires the ingredient's density, which is why one cup of flour lands around 120 g while one cup of sugar is closer to 200 g and a cup of butter sits near 227 g. Packable ingredients are the trickiest of all: firmly packed brown sugar weighs around 213 g per cup, but measured loosely it can come in 30-40 g lighter. This single factor explains why two people can follow the same recipe and get different results.
Oven temperature is its own small calculation. To go from Fahrenheit to Celsius, subtract 32 and multiply by five-ninths, then round to the nearest setting your dial offers, so 350 F becomes about 175-180 C, or gas mark 4. If you bake with a fan-forced or convection oven, drop the converted temperature by roughly 20 C or 25 F, because moving air cooks faster than still air. Getting this step right matters as much as the ingredients, since temperature controls rise, spread, and browning.
The most durable upgrade you can make is to stop relying on cups entirely and weigh in grams. A gram is the same amount regardless of who scoops it, which brand of cup they use, or how compacted the bag of flour is, so your bakes become repeatable. Use the converter to translate a recipe once, write the gram figures in the margin, and from then on you simply weigh as you go. It is faster, creates less washing up, and removes the biggest source of inconsistency in home baking.
- Weigh in grams whenever you can: it is the same amount every time, no matter who measures or how the bag is packed.
- If you must use cups for flour, spoon it in and level with a knife instead of scooping from the bag, which can pack in 20-30 g extra.
- Pack brown sugar firmly into the cup, since a loosely filled cup can weigh 30-40 g less and throw off moisture and texture.
- After converting an oven temperature, lower it by about 20 C or 25 F if you are using a fan or convection setting.