Cups, Grams and Tablespoons Explained

Every baker eventually meets the recipe that fails for no visible reason. Very often the invisible reason is a conversion: cups measure space, grams measure matter, and the bridge between them changes with every ingredient.

The density problem

“How many grams is a cup?” has no single answer. The same 237 ml of space holds:

• All-purpose flour: ~120 g
• Granulated sugar: ~200 g
• Packed brown sugar: ~220 g
• Butter: ~227 g
• Cocoa powder: ~85 g
• Honey: ~340 g

A single “grams per cup” factor applied to everything can be off by a factor of four. Ingredient-specific conversion is the only correct kind.

Flour: the worst offender

Flour compresses. Spooned gently into the cup and leveled, it weighs about 120 g; scooped straight from the bag, the packing pushes it to 140–150 g. That's up to 25% extra flour — enough to turn a tender cookie dense and a batter stiff. It's the single most common cause of “I followed the recipe exactly” failures. Weight has no such ambiguity: 120 g is 120 g however it was handled.

Which cup? The US/metric trap

The word “cup” itself is ambiguous: a US cup is ~237 ml, a metric cup (Australia, NZ) is 250 ml, and old UK recipes may mean the 284 ml imperial half-pint-based cup. A British flapjack recipe made with American cups quietly loses 5% of everything. Check the recipe's origin — or better, find a gram-based version.

The volume hierarchy worth memorizing

• 1 tablespoon = 3 teaspoons ≈ 15 ml
• 1 US cup = 16 tablespoons = 8 fl oz ≈ 237 ml
• 1 stick of butter = 1/2 cup = 8 tbsp ≈ 113 g

These cover the great majority of in-recipe conversions — halving 3/4 cup becomes “6 tablespoons” instead of an awkward fraction.

When precision matters — and when it doesn't

Baking is chemistry: flour, sugar, butter, leaveners and liquids set structure, so weigh them or convert carefully. Cooking is more forgiving — an extra 20 g of onion changes nothing. Spend your precision where the science is.

Convert by ingredient

The cooking converter has an ingredient-aware cups→grams mode (flour, sugars, butter, cocoa, honey and more), plus general volume and weight tabs — and a half-cup column for scaling down. For the fraction arithmetic recipes love to demand, the fraction calculator handles 3/4-of-2/3 without tears.