Cooking Conversion Charts and Calculators
These are the cooking conversion charts and calculators I use every week, and they’re all on this one page. Start with the oven temperature converter below. Enter any temperature in Celsius, fan Celsius, Fahrenheit or gas mark and the rest update as you type.
Underneath you’ll find a weight converter for grams to ounces, a searchable cups to grams chart that gives you the weight of a cup of flour, sugar or anything else you’re likely to bake with, a liquid converter that switches between US and metric measures, all the spoon and cup measures, and a tin size converter for when a recipe asks for a 9-inch tin. Every chart is set on a 250 ml cup, which is the one I use in all my recipes.
Oven Temperature Converter
Oven temperatures are the one conversion where you should not do the maths. The exact answer for 180°C is 356°F, but no recipe has ever said that, and no oven dial goes there. Recipes use a standard ladder of rounded values, which is what this converter follows. It also handles the fan oven question, which trips up more people than anything else, and gas marks for anyone cooking from an older British book.
Oven Temperature Converter
Change any one and the rest follow.
Fan ovens run hotter. Drop the conventional temperature by 20°C, and start checking about 10 minutes before the end of the baking time.
Full conversion chart
| Celsius | Fan | Fahrenheit | Gas mark |
|---|---|---|---|
| 110°C | 90°C | 225°F | ¼ |
| 120°C | 100°C | 250°F | ½ |
| 140°C | 120°C | 275°F | 1 |
| 150°C | 130°C | 300°F | 2 |
| 160°C | 140°C | 325°F | 3 |
| 170°C | 150°C | 340°F | 3 |
| 180°C | 160°C | 350°F | 4 |
| 190°C | 170°C | 375°F | 5 |
| 200°C | 180°C | 400°F | 6 |
| 210°C | 190°C | 410°F | 6 |
| 220°C | 200°C | 425°F | 7 |
| 230°C | 210°C | 450°F | 8 |
| 240°C | 220°C | 475°F | 9 |
Metric to Imperial Weight Converter
Weight is where converting matters most, because it's the one measurement that decides whether a cake works. This one does exact maths rather than rounding to convenient numbers, so 250 grams comes back as 8.8 ounces and not a tidied-up 9. The good news is that ounces and pounds are identical in Britain and America, so you don't need to know where your recipe came from. Convert grams to ounces, or work backwards from an American recipe into grams, and you'll get the same answer either way.
Weight Converter
Change any one and the rest follow.
250 g is 8.8 oz
Ounces and pounds are the same in the UK and the US, so this works wherever your recipe comes from.
Common weights
| Grams | Ounces | Pounds and ounces |
|---|---|---|
| 25 g | 0.9 oz | 0.9 oz |
| 50 g | 1.8 oz | 1.8 oz |
| 100 g | 3.5 oz | 3.5 oz |
| 125 g | 4.4 oz | 4.4 oz |
| 150 g | 5.3 oz | 5.3 oz |
| 200 g | 7.1 oz | 7.1 oz |
| 250 g | 8.8 oz | 8.8 oz |
| 300 g | 10.6 oz | 10.6 oz |
| 400 g | 14.1 oz | 14.1 oz |
| 500 g | 17.6 oz | 1 lb 1.6 oz |
| 750 g | 26.5 oz | 1 lb 10.5 oz |
| 1 kg | 35.3 oz | 2 lb 3.3 oz |
Millilitres to Fluid Ounces Converter
Liquid is the one with a trap in it. A US fluid ounce is 29.57 ml and an imperial one is 28.41 ml. A US cup is 240 ml while a metric cup, the kind used in South Africa, Britain and Australia, is 250 ml. That's roughly a 4% difference, which won't ruin a soup but will show up in a custard or a delicate batter. The toggle lets you pick which system your recipe is written in. All my recipes use a 250 ml cup, so leave it on metric if you're cooking from this site. The chart below the converter lists UK and US fluid ounces side by side, so you can read off either one without switching.
Liquid Measurement Converter
Change any one and the rest follow.
UK and metric measures. An imperial fluid ounce is 28.41 ml and a metric cup is 250 ml, as used in South Africa, the UK and Australia.
Common liquid measures
| Millilitres | UK fl oz | US fl oz | Cups (250 ml) |
|---|---|---|---|
| 15 ml | 0.5 | 0.5 | 0.06 |
| 30 ml | 1.1 | 1 | 0.12 |
| 60 ml | 2.1 | 2 | 0.24 |
| 125 ml | 4.4 | 4.2 | 0.5 |
| 150 ml | 5.3 | 5.1 | 0.6 |
| 200 ml | 7 | 6.8 | 0.8 |
| 250 ml | 8.8 | 8.5 | 1 |
| 375 ml | 13.2 | 12.7 | 1.5 |
| 500 ml | 17.6 | 16.9 | 2 |
| 750 ml | 26.4 | 25.4 | 3 |
| 1 l | 35.2 | 33.8 | 4 |
Baking Tin Length and Size Converter
Length and Tin Size Converter
Change either one and the other follows.
That's a 9 inch tin. Tins are sold in rounded sizes, so a 9 inch tin is 23 cm even though the exact conversion is 9.1 inches.
Standard tin sizes
| Metric tin | Sold as | Exact |
|---|---|---|
| 15 cm | 6 inch | 5.9 in |
| 18 cm | 7 inch | 7.1 in |
| 20 cm | 8 inch | 7.9 in |
| 23 cm | 9 inch | 9.1 in |
| 25 cm | 10 inch | 9.8 in |
| 28 cm | 11 inch | 11 in |
| 30 cm | 12 inch | 11.8 in |
| 33 cm | 13 inch | 13 in |
Cups to Grams By Ingredient Chart
Cups to Grams by Ingredient
Based on a 250 ml cup, the size I use in every recipe.
| Ingredient (1 cup) | Grams | Ounces |
|---|---|---|
| Flours and starches | ||
| Plain or cake flour | 125 g | 4.4 oz |
| Self-raising flour | 125 g | 4.4 oz |
| Bread flour | 130 g | 4.6 oz |
| Wholemeal flour | 135 g | 4.8 oz |
| Cornflour | 130 g | 4.6 oz |
| Ground almonds | 100 g | 3.5 oz |
| Rolled oats | 100 g | 3.5 oz |
| Cocoa powder | 90 g | 3.2 oz |
| Desiccated coconut | 85 g | 3 oz |
| Dry breadcrumbs | 110 g | 3.9 oz |
| Fresh breadcrumbs | 50 g | 1.8 oz |
| Sugars | ||
| Caster sugar | 210 g | 7.4 oz |
| Granulated sugar | 205 g | 7.2 oz |
| Brown sugar, firmly packed | 220 g | 7.8 oz |
| Icing sugar, sifted | 120 g | 4.2 oz |
| Fats and liquids | ||
| Butter | 230 g | 8.1 oz |
| Oil | 230 g | 8.1 oz |
| Water | 250 g | 8.8 oz |
| Milk | 260 g | 9.2 oz |
| Cream | 250 g | 8.8 oz |
| Yoghurt | 260 g | 9.2 oz |
| Honey or golden syrup | 350 g | 12.3 oz |
| Odds and ends | ||
| Chocolate chips | 175 g | 6.2 oz |
| Chopped nuts | 115 g | 4.1 oz |
| Raisins or sultanas | 170 g | 6 oz |
| Grated cheddar | 100 g | 3.5 oz |
| Uncooked rice | 200 g | 7.1 oz |
| Nothing matching that. Try a shorter word. | ||
Weigh it if you can. A cup of flour can vary by 20 grams depending on whether you scoop it or spoon it in, which is enough to change a cake. These figures assume flour is spooned into the cup and levelled off, and that brown sugar is firmly packed.
If your recipe comes from an American book or site, its cup is 240 ml rather than 250 ml, so its weights will be about 4% lighter than these.
Spoon and Cup Measures
Spoon and Cup Measures
Based on a 250 ml cup and a 15 ml tablespoon.
| Measure | Millilitres | Fluid ounces |
|---|---|---|
| Spoons | ||
| ¼ teaspoon | 1.25 ml | — |
| ½ teaspoon | 2.5 ml | — |
| 1 teaspoon | 5 ml | 0.2 fl oz |
| 1 tablespoon (3 tsp) | 15 ml | 0.5 fl oz |
| 2 tablespoons | 30 ml | 1.1 fl oz |
| Cups | ||
| ¼ cup | 60 ml | 2.1 fl oz |
| ⅓ cup | 80 ml | 2.8 fl oz |
| ½ cup | 125 ml | 4.4 fl oz |
| ⅔ cup | 160 ml | 5.6 fl oz |
| ¾ cup | 180 ml | 6.3 fl oz |
| 1 cup | 250 ml | 8.8 fl oz |
| 1¼ cups | 300 ml | 10.6 fl oz |
| 1½ cups | 375 ml | 13.2 fl oz |
| 1⅔ cups | 400 ml | 14.1 fl oz |
| 1¾ cups | 450 ml | 15.8 fl oz |
| 2 cups | 500 ml | 17.6 fl oz |
| 2½ cups | 600 ml | 21.1 fl oz |
| 3 cups | 750 ml | 26.4 fl oz |
| 4 cups | 1 litre | 35.2 fl oz |
Check where your recipe is from. A US cup is 240 ml rather than 250 ml, and an Australian tablespoon is 20 ml rather than 15 ml. Fluid ounces here are imperial.
My easy oven-to-air fryer conversion guide
A few of my all-time best recipes:
Jamie Oliver's fantastic fish pie
My grandmother Betty's crunchie recipe
The best classic South African buttermilk rusks
My best recipes for: 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015 and 2014.
BUY MY eBOOK COMFORT
Find me on Instagram & Pinterest
Cooking Conversion Chart & Calculator