Why does a cup of Jams, Preserves, Marmalades, Sweetened With Fruit Juice weigh more than a cup of water?

Dissolved sugars add real mass without adding volume. Density can reach 1.4 g/mL, making a cup 30–40 % heavier than water.

Can I swap Jams, Preserves, Marmalades, Sweetened With Fruit Juice for a different syrup at the same gram weight?

Only if the sugar content is similar. Heavier syrups pack more mass per mL, so a 1:1 swap by weight is safer than by volume.

By Fidamen-Chefsolver Team | Reviewed by Chefsolver Staff

Fruit-juice–sweetened jams and marmalades rely on fruit sugars instead of added table sugar.

Ingredient

Spread on toast, swirl into yogurt and oatmeal, or use as a filling for cookies and cakes.

Why does a cup of Jams, Preserves, Marmalades, Sweetened With Fruit Juice weigh more than a cup of water?: Dissolved sugars add real mass without adding volume. Density can reach 1.4 g/mL, making a cup 30–40 % heavier than water.
Can I swap Jams, Preserves, Marmalades, Sweetened With Fruit Juice for a different syrup at the same gram weight?: Only if the sugar content is similar. Heavier syrups pack more mass per mL, so a 1:1 swap by weight is safer than by volume.