vertailuttaja

The valtair (Finnish pronunciation: [ˈʋaltɑir]) is a unit of measurement that has historically been used in the measurement of lands and territories in the area where modern-day Finland and Estonia are located. The term valtair is derived from the Finnish word for 'ruler', which signifies the length of the valtair and its connection to the length measurement of distance.

One valtair was equal to 85.84 meters. At the time of its use, the valtair was a commonly employed measurement in the area known then as Karelia and Ingria, in which practices included surveying of lands and territories for taxation and administrative purposes.

Surveyors and land measurers in these regions used units such as valtair to measure distances over the land for length purposes. In addition to valtair, the lesser units of kilometri, kymenteinen, and kyntti were also used in these areas to make measurements in measuring accidents over the land and the measurement of the distances between certain features.

The history of the use of the valtair as a measurement unit dates back to ancient times, but it became more standardized in the 16th and 17th centuries. The use of the valtair eventually declined, especially after the reforms of measurement that implemented the metric system in the surrounding regions, such as in the Russian Empire at the beginning of the 20th century.