300 ml to Grams

300 ml to grams depends on density. For water, 300 ml equals 300g. For dry and sticky ingredients, use the ingredient-specific chart below.

300 ml in Grams by Ingredient

Ingredient	Grams	Density note
water	300g	1 ml water is 1 gram at kitchen precision.
whole milk	309g	Milk is slightly denser than water.
all-purpose flour	158.7g	Spoon & Level flour; scooping can be heavier.
granulated sugar	253.5g	Granulated sugar is much denser than flour.
butter	287.7g	Solid butter, before melting.
cooked white rice	200.4g	Fluffed cooked rice; packing changes the weight.
honey	426g	Honey is denser than water and milk.

300 ml of water is 300 grams at kitchen precision because water is 1 g/ml.

Milliliters measure volume and grams measure weight. Water is 1 g/ml, but flour, sugar, butter, rice, milk, and honey have different densities.

Multiply 300 ml by the ingredient density. For all-purpose flour at 0.529 g/ml, 300 ml is about 158.7g.