Cup & Gram

340 Grams to Cups

340 grams is 2 ⅞ cups of all-purpose flour, 1 ⅔ cups of granulated sugar, or 1 ½ cups of butter — grams measure weight, cups measure volume, so the answer always depends on the ingredient's density. Find yours in the table below; every density is verified against King Arthur and USDA data.

340 g is also 12 oz by weight. For water and thin liquids, 340 g is simply 340 ml.

340 grams to cups, by ingredient

340 g in US cups (2026-08-20 verified densities)
IngredientCupsDecimalMeasure it as
all-purpose flour 2 ⅞ cups 2.83 2 cups + 13 tbsp
granulated sugar 1 ⅔ cups 1.7 1 cup + 11 tbsp
powdered sugar 2 ⅞ cups 2.83 2 cups + 13 tbsp
brown sugar (packed) 1 ⅝ cups 1.6 1 cup + 10 tbsp
honey 1 cup 1 1 cup
butter 1 ½ cups 1.5 1 cup + 8 tbsp
milk (whole) 1 ⅜ cups 1.39 1 cup + 6 tbsp
uncooked white rice 1 ⅞ cups 1.84 1 cup + 13 tbsp
rolled oats 3 ⅞ cups 3.82 3 cups + 13 tbsp
chocolate chips 2 cups 2 2 cups
cocoa powder 4 cups 4.05 4 cups + 1 tbsp
water 1 ⅜ cups 1.42 1 cup + 7 tbsp

Why the ingredient changes the answer

A US cup is a fixed volume (about 237 ml), but a cup of flour weighs 120 g while a cup of honey weighs 340 g — density is the whole game. That's also why there's no single "grams to cups" conversion factor, and why our converter asks for the ingredient first.

Convert another amount

250 g All-purpose flour = 2 ⅛ cups

Exactly 2.08 cups — or measure 2 cups + 1 tbsp.

Nearby amounts

Ingredient-specific charts: flour · sugar · butter · all ingredients · Reverse: cups to grams

Data verified 2026-08-20 · Methodology & sources