Inch (in)
Definition: An inch (in) is an imperial unit of length equal to 1/12 of a foot or 2.54 centimeters. It is commonly used for measuring small distances and screen sizes.
History: The inch was originally based on the width of a human thumb. It was later standardized in the 14th century by King Edward II of England as three barleycorns placed end to end.
Current Use: Inches are widely used in the US, UK, and Canada for measuring screen sizes, furniture dimensions, and industrial tools. It remains a popular unit in carpentry, printing, and manufacturing.
Petameter (Pm)
Definition: A petameter (Pm) is a unit of length equal to 10^15 meters, used for measuring large cosmic distances such as the size of galaxies and nebulae.
History: The petameter was introduced to simplify extremely large measurements in astronomy, allowing researchers to express vast distances in a comprehensible unit.
Current Use: Petameters are used in astrophysics when discussing galaxy clusters, intergalactic distances, and space phenomena on an enormous scale.
Quick Conversion Table Inch (in) to Petameter (Pm)
1 Inch (in) equal to 2.540e-17 Petameter (Pm)
5 Inch (in) equal to 1.270e-16 Petameter (Pm)
10 Inch (in) equal to 2.540e-16 Petameter (Pm)
20 Inch (in) equal to 5.080e-16 Petameter (Pm)
30 Inch (in) equal to 7.620e-16 Petameter (Pm)
50 Inch (in) equal to 1.270e-15 Petameter (Pm)
75 Inch (in) equal to 1.9050e-15 Petameter (Pm)
100 Inch (in) equal to 2.540e-15 Petameter (Pm)