Tønne (unit)

A tønne (plural tønner) is an old Norwegian unit of volume equivalent to a barrel. There was a dry tønne and a liquid tønne. The volume of a tønne has varied over time in Norway, including many local variations.

The dry tønne was standardized in 1824 as equivalent to 138.97 L. A tønne of potatoes weighed about 100 kg. A dry tønne was divided into four fjerdinger, equivalent to 34.71 L each. The liquid tønne was equivalent to 115.81 L.

In addition, the term tønne (a "barrel of land") was used as a measurement of area equivalent to 3937 m2. This corresponded to the amount of land that could be sown with one tønne of seed.