Why is decaf brewed coffee almost exactly water density?

Brewed coffee is 98.5-99% water by mass. The dissolved solids (coffee oils, acids, melanoidins, and residual caffeine) total only 1-1.5 g per 100 ml, raising the density to just 1.002 g/ml. Decaffeination does not meaningfully change this because caffeine itself is present at only about 40-80 mg per cup in regular coffee.

Does decaf coffee behave differently than regular coffee in baking?

By weight, no. Both regular and decaf brewed coffee have essentially the same density (~1.002 g/ml) and contribute the same mass per cup. The flavor difference is minimal when coffee is one ingredient among many. In recipes like chocolate cake where coffee enhances cocoa, decaf works identically by weight without adding caffeine.

How many grams of decaf coffee should I use for tiramisu?

Traditional tiramisu calls for about 1-1.5 cups of strong coffee for soaking ladyfingers. At 1.002 g/ml, one cup weighs 237 g. For stronger flavor, brew a double-strength batch (using twice the grounds per cup of water); the density will rise only slightly to about 1.004-1.006 g/ml, adding at most 1 g per cup.

Boissons, Café, Infusé, Préparé avec de l'eau du robinet, Décaféiné : conversion mL vers grammes

Par Fidamen-Chefsolver Team | Révisé par Ugo Candido

Decaffeinated brewed coffee is a nearly pure aqueous extraction with a density of 1.002 g/ml, only fractionally heavier than plain water. One US cup weighs approximately 237 g and one tablespoon about 14.8 g. The decaffeination process removes 97% or more of the caffeine but leaves behind the bitter phenolic compounds, oils, and melanoidins that define coffee flavor. Decaf brewed coffee is used in tiramisu, coffee-flavored ice cream bases, chocolate cake recipes where it deepens cocoa flavor, and as a braising liquid for beef. At this density, it can be treated as water by weight in virtually any recipe calculation.

Quick convert

Ingrédient

Tasse US = 236,588 mL
1 c. à soupe = 14,787 mL
1 c. à café = 4,929 mL

Table de référence

Boissons, Café, Infusé, Préparé avec de l'eau du robinet, Décaféiné — de millilitres en grammes
mL	g
10	10
25	25
50	50
75	75
100	100

Comment fonctionne cette conversion

Les millilitres mesurent le volume et les grammes le poids. La densité de Boissons, Café, Infusé, Préparé avec de l'eau du robinet, Décaféiné étant de 1.002 g/mL, 10 mL pèsent 10 g — et non 10 g comme ce serait le cas pour l'eau. Ce convertisseur utilise la densité réelle de Boissons, Café, Infusé, Préparé avec de l'eau du robinet, Décaféiné pour un résultat précis.

Notes de mesure

Les valeurs sont arrondies au gramme le plus proche. Le poids réel peut varier légèrement selon le tassement, la température et la marque. Pour la pâtisserie de précision, une balance de cuisine est toujours plus fiable que les mesures volumétriques.

Questions fréquentes

Why is decaf brewed coffee almost exactly water density?: Brewed coffee is 98.5-99% water by mass. The dissolved solids (coffee oils, acids, melanoidins, and residual caffeine) total only 1-1.5 g per 100 ml, raising the density to just 1.002 g/ml. Decaffeination does not meaningfully change this because caffeine itself is present at only about 40-80 mg per cup in regular coffee.
Does decaf coffee behave differently than regular coffee in baking?: By weight, no. Both regular and decaf brewed coffee have essentially the same density (~1.002 g/ml) and contribute the same mass per cup. The flavor difference is minimal when coffee is one ingredient among many. In recipes like chocolate cake where coffee enhances cocoa, decaf works identically by weight without adding caffeine.
How many grams of decaf coffee should I use for tiramisu?: Traditional tiramisu calls for about 1-1.5 cups of strong coffee for soaking ladyfingers. At 1.002 g/ml, one cup weighs 237 g. For stronger flavor, brew a double-strength batch (using twice the grounds per cup of water); the density will rise only slightly to about 1.004-1.006 g/ml, adding at most 1 g per cup.