There is no single grams-to-cups number - a cup of flour is 120g, a cup of honey 336g. Pick your actual ingredient and get the real answer, verified against King Arthur Baking’s chart.
A cup is a volume; a gram is a weight - so the conversion depends entirely on how dense the ingredient is. One US cup of all-purpose flour weighs about 120g, granulated sugar 198g, and honey 336g - nearly three times the flour. Any page giving you one flat "grams per cup" number is giving you a wrong answer for almost everything you'd actually measure. The figures here are verified against King Arthur Baking's published ingredient weight chart, the most widely used reference in home baking.
Which cup? These weights are per US customary cup (236.6 mL), the cup King Arthur uses. An Australian, New Zealand or Canadian recipe means a metric cup of 250 mL, about 6% larger, so a metric cup of flour is closer to 127g than 120g. A UK imperial cup is 284 mL, about 20% larger again. The gap matters most in baking, which is the argument for weighing rather than measuring by volume in the first place.
Even for the same flour, technique changes the weight: spooned gently into the cup and leveled, it's about 120g; scooped straight from the bag, closer to 140g, because scooping compacts it. That 17% swing is the biggest source of dense, dry bakes. If a recipe gives grams, trust the grams - it's the whole reason bakers weigh.
This page covers the most-searched ingredients. The full ingredient converter handles both directions (cups to grams too), partial cups, and the spooned-vs-scooped flour choice explicitly.
It depends entirely on the ingredient, because a cup measures volume and a gram measures weight. A cup of water is about 240 g, all-purpose flour about 120 g, granulated sugar about 200 g, and honey about 336 g.
Because they measure it differently. Published figures range from about 120 g to 161 g for the same cup of all-purpose flour - a 34% spread. Flour scooped straight from the bag compacts and weighs far more than flour spooned in and levelled. Weighing is the only way to remove the ambiguity.
No. A US customary cup is 236.6 mL, the US legal cup used on nutrition labels is 240 mL, a metric cup is 250 mL, and a Japanese cup is 200 mL. For baking, that difference is enough to matter.