How Many Grams Are in a Cup: Grams to Cups and Cups to Grams

Convert grams to cups and cups to grams using our conversion table and conversion calculator, and learn the relationship between these two units.

Conversion of grams to cups and cups to grams is easy, but one must be aware that the gram is a unit of mass, while the cup is a unit of volume and some assumptions must be made. Also, there are two "standard" size cups, the US cup and the Imperial cup.

Grams to Cups and Cups to Grams Conversion Calculator

In order to convert grams to cups and cups to grams, feel free to use this conversion calculator - write the value that You have and click 'Calculate' to convert it (again, values are very accurate for plain water, but for other liquids, You must also calculate in the liquids' densities):

Conversion Formulas

Gram is a metric system unit of mass and it was first defined as a mass of 1 milliliter (1 cm³) of water at 0°C (later at 4°C) - modern definition of a gram and a kilogram is based on the fixed numerical value of the Planck constant h, but the actual difference is very small and can be ignored in everyday situations.

Thus, cups-grams conversion formulas are:

1 US (Legal) Cup = 240ml = 240 grams (of water)

1 Imp Cup = 284.131ml = 284.131 grams (of water)

Note: The US customary cup equals 8 US fluid ounces, which is 236.5882365 milliliters, which is very close to the US Legal Cup of 240 ml. If not stated otherwise, US Legal Cups are used.

It must be emphasized that if You have a liquid that is less dense than the water (oil, gas/petrol, etc.) or denser than the water (salty water, for example) then in order to accurately convert the grams to cups and cups to grams, You also have to take the density of the liquid into account.

Grams to Cups and Cups to Grams Conversion Examples

If You have 2 cups (US/Imp) of water that would be:

V(g) = 240 * V(US Cup) = 240 * 2 = 480 ml = 480 grams (of water)

V(g) = 284.131 * V(Imp Cup) = 284.131 * 2 = 568.262 ml = 568.262 grams (of water)

Similarly, if You have 100g of water, that would be:

100g = (100g / 240) = 0.41666 US Cups

100g = (100g / 284.131) = 0.3519 Imp Cups

etc.

Grams to Cups and Cups to Grams Conversion Table

Here is a grams to cups and cups to grams quick conversion table to aid You with units' conversions (again, values are very accurate for plain water, for other liquids, You must also calculate the liquids' densities):

For more values, please, use the conversion calculators.