Cooking Conversion Calculator

Two converters in one. Convert cups to grams and millilitres for common ingredients (it knows that flour and sugar weigh differently), and convert oven temperatures between Celsius, Fahrenheit and gas mark. Everything updates as you type.

How it works

• Cups → grams uses a stored density (grams per US cup) for each ingredient, scaled by the unit you pick (1 cup = 16 tbsp = 48 tsp).
• Cups → ml is pure volume: 1 US cup = 237 ml, 1 tbsp = 14.8 ml, 1 tsp = 4.93 ml.
• °F → °C = (°F − 32) × 5/9; °C → °F = °C × 9/5 + 32.
• Gas mark is matched to the nearest standard step (mark 4 ≈ 180°C / 350°F).

FAQ

How many grams are in a cup?

It depends on the ingredient, because a cup is a volume and grams are a weight. One US cup is about 125 g of plain flour, 200 g of granulated sugar, 220 g of butter, 240 g of water or milk, and 340 g of honey. That's why a good conversion has to know what you're measuring — this calculator uses per-ingredient densities.

How do I convert oven temperature from Fahrenheit to Celsius?

Subtract 32 then multiply by 5/9. For example, 350°F = (350 − 32) × 5/9 ≈ 177°C, usually rounded to 180°C. Going the other way, multiply by 9/5 and add 32. The calculator also shows the UK gas mark, where gas mark 4 ≈ 180°C / 350°F.

Why is cups-to-grams different for flour and sugar?

Because they have different densities. A cup is a fixed volume, but a cup of light, airy flour weighs far less than a cup of dense sugar or honey. That's why baking is much more reliable by weight — this tool stores a density for each common ingredient.

Is a US cup the same as a UK or metric cup?

No. A US cup is about 237 ml, a metric cup is 250 ml, and an old UK imperial cup was about 284 ml. This calculator uses the US cup (237 ml), which is what most online recipes assume unless they say otherwise.

What is gas mark in Celsius?

Gas mark 1 = 140°C, 2 = 150°C, 3 = 170°C, 4 = 180°C, 5 = 190°C, 6 = 200°C, 7 = 220°C, 8 = 230°C, 9 = 240°C. Each step is about 10–20°C. The calculator picks the nearest gas mark for any temperature.

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