length · Nordic countries / Finland · Historical

poronkusema

approx.informal

Record: M244
Definition quality: Informal / traditional approximate
Conversion mode: multiplicative
Calculator: Approximately calculable

Definition

Kotus: distance a draught reindeer travels without urinating; average around five kilometres.

Reference value

One poronkusema is understood to be about 5,000 metres.

History & use

Kotus: distance a draught reindeer travels without urinating; average around five kilometres.

Modern use

Retained primarily for historical, educational, or reference use rather than as a current standardized calculator unit.

Did you know?

The name literally describes a reindeer's biology: a poronkusema is the distance a draught reindeer travels without urinating. Finland's language institute puts the average near 5 km.

Sources & evidence

Source tier Tier B/C — recorded secondary/reference source · confidence Moderate-High

Related measurements

metre

length · International · Modern

SI base unit of length. Its definition fixes the speed of light in vacuum at exactly 299,792,458 m/s, with the second defined from the caesium-133 hyperfine frequency.