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A kind of fruit preserves · also called Fruit jam

About
Jam is a dense, sugary fruit spread that packs substantial weight into a compact jar.
Because fruit preserves are cooked down with sugar, jam has a density of about 11.1 ounces per US cup (1.33 grams per milliliter). This sugar concentration means it occupies far less space than the fresh fruit used to make it. By volume, jam is substantially heavier than water and peanut butter. It is slightly lighter than thick sweeteners like honey, but it remains one of the denser spreads in the kitchen.
From Wikipedia
Fruit preserves are preparations of fruits whose main preserving agent is sugar and sometimes acid, often stored in glass jars and used as a condiment or spread.
Read more on Wikipedia →Text from Wikipedia’s “Fruit preserves” article, CC BY-SA 4.0.
One cup weighs
11.1 oz (315 g)
Quick answer
One US cup of jam weighs about 11.1 ounces (315 grams). This makes it roughly one-third heavier than an equal volume of plain water.
Typical figures, the same ones every comparison on the site uses; real ones vary.
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