Convert cooking measurements instantly
Three tools in one: convert between cups, tablespoons, teaspoons, milliliters and other volume units; convert an oven temperature between Fahrenheit, Celsius and Gas Mark; or convert a specific ingredient between cups (volume) and grams (weight) using real ingredient densities.
How to use it
- Pick the Volume, Oven Temp or Ingredient tab.
- Enter your value.
- Read the converted result instantly.
Why a "cup" of flour and a "cup" of sugar weigh differently
A cup is a unit of volume, not weight - it measures how much space an ingredient takes up, not how heavy it is. Flour is light and full of air pockets, so a cup weighs about 120g. Sugar packs more densely, so a cup of it weighs about 200g. Butter is denser still, at roughly 227g per cup. This is why baking recipes that give weights in grams are more precise than ones that only give cups - the Ingredient tab here uses standard reference densities for common baking ingredients.
Oven temperature and Gas Mark
US recipes almost always use Fahrenheit, most of the rest of the world uses Celsius, and older UK recipes (and some ovens) use Gas Mark, a numbered scale from 1 (lowest) to 9 (highest). A moderate oven - 350°F / 180°C - is Gas Mark 4, the most common baking temperature.
Common uses
- Following a US recipe with an oven that only shows Celsius or Gas Mark
- Scaling a recipe written in cups into grams for accuracy
- Converting tablespoons to cups (or the reverse) mid-recipe
- Doubling or halving a recipe without doing the math by hand
Reference: oven temperatures
| °F | 275 | 300 | 325 | 350 | 375 | 400 | 425 | 450 |
|---|---|---|---|---|---|---|---|---|
| °C | 140 | 150 | 170 | 180 | 190 | 200 | 220 | 230 |
| Gas Mark | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Frequently asked questions
Why does 1 cup of flour weigh differently to 1 cup of sugar?
A cup measures volume, not weight, so the gram equivalent depends on how dense the ingredient is. Flour is light and airy (about 120g per cup) while sugar is denser (about 200g per cup) - using the wrong ingredient's conversion is a common baking mistake.
What oven temperature system should I use?
Use whatever your recipe specifies. US recipes typically use Fahrenheit, UK/European recipes use Celsius, and older UK recipes and some ovens use Gas Mark - this tool converts between all three.
Is it free?
Yes, completely free with no signup.