Convert petagram to stone (US)
Please provide values below to convert petagram [Pg] to stone (US) [st (US)], or Convert stone (US) to petagram.
How to Convert Petagram to Stone (Us)
1 Pg = 157473044417.77 st (US)
Example: convert 15 Pg to st (US):
15 Pg = 15 × 157473044417.77 st (US) = 2362095666266.55 st (US)
Petagram to Stone (Us) Conversion Table
| petagram | stone (US) |
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Petagram
A petagram (Pg) is a unit of mass equal to 10^15 grams or one quadrillion grams.
History/Origin
The petagram was introduced as part of the metric system's prefixes to represent extremely large masses, following the adoption of the International System of Units (SI). It is derived from the prefix 'peta-' which denotes 10^15.
Current Use
The petagram is primarily used in scientific contexts to quantify very large masses, such as in astronomy and geology, but is rarely used in everyday measurements.
Stone (Us)
A stone (st) is a unit of weight primarily used in the United States, equal to 14 pounds or approximately 6.35 kilograms.
History/Origin
The stone has origins in medieval England, where it was used as a convenient weight measure for trade and commerce. Its value varied regionally before standardization, and it has been used historically for measuring human body weight and other goods.
Current Use
Today, the stone is mainly used in the UK and Ireland for body weight measurement, while in the United States, it is rarely used and often replaced by pounds or kilograms in most contexts.