About

Donnawara publishes conversion tools and reference articles for units of land, weight and currency that are specific to one culture and attached to money.

Generic conversion is already solved. What is not solved is the unit that changes meaning when it crosses a border, carries a price, or survives after the law that governs it has banned it. Those are the pages here.

How figures are checked

Every conversion constant is given as an exact fraction where one exists, with the rounded decimal shown beside it. Where a unit varies by region or period, the variation is stated instead of being averaged away. Each page carries the month its figures were last verified.

Where a number comes from a statute, a historical measurement law or an exchange convention, the origin is named in the text rather than left implicit.

Corrections

If a figure here is wrong, write to blog@donnawara.com. Corrections are made on the page and the verification date is updated.

Publisher

Donnawara is operated by BiiN Company Co., Ltd., Republic of Korea.