How Many Grams Are in a Cup: Grams to Cups and Cups to Grams
On This Page:
Conversion Formulas
Convert grams to cups and cups to grams using our conversion chart, 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.
Gram is a metric system unit of mass and it was first defined as a mass of 1 milliliter (1 cm^{3}) 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, cupsgrams conversion formulas are:
1 US Cup = 240ml = 240 grams (of water)
1 Imp Cup = 284.131ml = 284.131 grams (of water)
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
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):
Grams to US Cups 
Grams: US Cups: 
US Cups to Grams 
US Cups: Grams: 
Grams to Imperial Cups 
Grams: Imperial Cups: 
Imperial Cups to Grams 
Imperial Cups: Grams: 
Grams to Cups and Cups to Grams Conversion Charts
Here are some grams to cups and cups to grams quick conversion charts to aid You with units' conversions (again, values are very accurate for plain water, for other liquids, You must also calculate the liquids' densities):
Grams  US Cups  Imperial Cup 
1  0.0041  0.0035 
10  0.0416  0.0351 
50  0.2083  0.1759 
100  0.4166  0.3519 
240  1  0.8446 
284.131  1.1838  1 
453.6 (~1 lbs)  1.89  1.5964 
500  2.0833  1.7597 
800  3.3333  2.8156 
1000  4.1666  3.5195 


For more values, please, use the conversion calculators.