Convert Siriometer to Barleycorn (siriometer to Barleycorn)

Siriometer (siriometer) and Barleycorn (Barleycorn) are both units of length. With the conversion form below, you can effortlessly and accurately convert siriometer to barleycorn. This free online calculator tool makes it simple and easy to perform the conversion from siriometer unit to the Barleycorn unit.

Length is the measure of distance in one dimension—the extent of an object from one end to the other, or the distance between two points. The SI base unit is themeter (m), defined since 1983 as the distance light travels in a vacuum in 1/299,792,458 of a second. Common derived units include the kilometer (1 km = 1,000 m) for distances and the centimeter (cm) and millimeter (mm) for everyday measurements. US customary length units include the inch (in), foot (ft), yard (yd), and mile (mi). The nautical mile (1,852 m) is used in aviation and maritime navigation.

The siriometer (symbol: Sm) is a non-SI unit of length historically used in astronomy to express extremely large distances. One siriometer is equal to one million astronomical units (AU), or approximately 1.495978707 × 10¹⁷ meters. Although it has largely been replaced by the light-year and parsec, the siriometer played an important role in early astronomical literature. More information is available in the siriometer article.

One siriometer is equal to 1,000,000 astronomical units, approximately 15.8125 light-years, approximately 4.84814 parsecs, 149,597,870,700,000 kilometers, and 149,597,870,700,000,000 meters. The siriometer is now considered an obsolete astronomical unit but remains of historical interest in older scientific publications.

The barleycorn is a traditional unit of length equal to one-third of an inch (0.3333 in or 8.4667 mm). Historically based on the average length of a grain of barley, it has been used in the British Imperial and U.S. customary systems, particularly for measuring shoe sizes. Learn more about length.

One barleycorn is equal to 0.333333 inch, 8.46667 millimeters, 0.846667 centimeter, and 0.00846667 meter. Although rarely used as a general unit today, the barleycorn remains important in traditional shoe sizing systems and historical measurement references.