Cooking converter

How many grams are in a cup?

Convert recipe amounts by ingredient.

Ingredient

Recipe amount

From

Cup sizes, accuracy and sources

US: cup ≈ 236.588 ml, tablespoon ≈ 14.787 ml, teaspoon ≈ 4.929 ml. Metric: cup = 250 ml, tablespoon = 15 ml, teaspoon = 5 ml. Check your recipe’s measure size.

These are estimates: packing, brand, moisture and temperature change the weight. Use level measures; weigh ingredients when accuracy matters. Milk uses about 1.031 g/ml and water about 1 g/ml.

Sources: King Arthur Baking: Ingredient Weight Chart; FAO: Small-Scale Dairy Farming Manual; NIST: Density; NIST SP 811: volume conversion factors; Health Canada: Measure ingredients like a pro · Checked 15 October 2026

Result

120 g

Approximate · All-purpose flour, loose

How to use

Choose US or metric measures and the ingredient in your recipe.
Enter the amount, then choose the units you have and the units you need. Copy the result if useful.

All-purpose flour: US cups to grams

US cup	g
0.25	30
0.5	60
0.75	90
1	120
1.5	180
2	240

How it works

Cups and spoons measure volume; grams measure mass. Ingredients have different densities, so the same cup holds different weights of flour, sugar or honey. The conversion is mass = volume × density, with volume in millilitres and density in grams per millilitre.

For example, King Arthur Baking lists 120 g for a US cup of all-purpose flour. Two US cups therefore weigh about 240 g. Baking ingredient estimates come from its Ingredient Weight Chart: https://www.kingarthurbaking.com/learn/ingredient-weight-chart. Milk uses the midpoint of the FAO’s published density range (1.028–1.034 g/ml at 15°C), while water uses NIST’s approximate 1 g/ml.

The US customary cup is about 236.588 ml; the metric cup here is 250 ml, with 15 ml tablespoons and 5 ml teaspoons. US cups are the default. Packing and ingredient varieties matter more than extra decimal places: flour is loose, brown sugar packed, rice uncooked and salt fine table salt. Prefer the recipe’s own gram weights or a scale.

Frequently asked questions

Is a cup always 250 ml?

No. This tool offers US customary cups (about 236.588 ml) and metric cups (250 ml). A cup in a US nutrition label is 240 ml. Check the recipe and the marks on your measuring cup.

Can I convert grams back into cups?

Yes. Select grams as the input unit and cups as the output. Pick the same ingredient and cup system used by your recipe.

Does every tablespoon hold 15 ml?

No. US tablespoons are about 14.787 ml; the metric option here uses 15 ml. Australian recipes often use a 20 ml tablespoon, which this tool does not offer.

Why does a cup of flour weigh less than a cup of sugar?

They have different bulk densities. The same volume can hold a different mass, so select the ingredient before converting cups to grams.

Should I use these estimates instead of a kitchen scale?

Use the recipe’s gram weights and a scale when available. Packing and moisture change how much fits in a cup, especially for flour and brown sugar.

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