# 521 pounds to stones

## Result

521 pounds equals 37.2143 stones

You can also convert 521 pounds to stones and pounds.

## Conversion formula

Multiply the amount of pounds by the conversion factor to get the result in stones:

521 lbs × 0.0714286 = 37.2143 st

## How to convert 521 pounds to stones?

The conversion factor from pounds to stones is 0.0714286, which means that 1 pounds is equal to 0.0714286 stones:

1 lbs = 0.0714286 st

To convert 521 pounds into stones we have to multiply 521 by the conversion factor in order to get the amount from pounds to stones. We can also form a proportion to calculate the result:

1 lbs → 0.0714286 st

521 lbs → m(st)

Solve the above proportion to obtain the mass m in stones:

m(st) = 521 lbs × 0.0714286 st

m(st) = 37.2143 st

The final result is:

521 lbs → 37.2143 st

We conclude that 521 pounds is equivalent to 37.2143 stones:

521 pounds = 37.2143 stones

## Result approximation

For practical purposes we can round our final result to an approximate numerical value. In this case five hundred twenty-one pounds is approximately thirty-seven point two one four stones:

521 pounds ≅ 37.214 stones

## Conversion table

For quick reference purposes, below is the pounds to stones conversion table:

pounds (lbs) stones (st)
522 pounds 37.285729 stones
523 pounds 37.357158 stones
524 pounds 37.428586 stones
525 pounds 37.500015 stones
526 pounds 37.571444 stones
527 pounds 37.642872 stones
528 pounds 37.714301 stones
529 pounds 37.785729 stones
530 pounds 37.857158 stones
531 pounds 37.928587 stones

## Units definitions

The units involved in this conversion are pounds and stones. This is how they are defined:

### Pounds

The pound or pound-mass is a unit of mass used in the imperial, United States customary and other systems of measurement. A number of different definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.45359237 kilograms, and which is divided into 16 avoirdupois ounces. The international standard symbol for the avoirdupois pound is lb; an alternative symbol is lbm (for most pound definitions), # (chiefly in the U.S.), and ℔ or ″̶ (specifically for the apothecaries' pound). The unit is descended from the Roman libra (hence the abbreviation "lb"). The English word pound is cognate with, among others, German Pfund, Dutch pond, and Swedish pund. All ultimately derive from a borrowing into Proto-Germanic of the Latin expression lībra pondō ("a pound by weight"), in which the word pondō is the ablative case of the Latin noun pondus ("weight"). Usage of the unqualified term pound reflects the historical conflation of mass and weight.

### Stones

The stone or stone weight (abbreviation: st.) is an English and imperial unit of mass now equal to 14 pounds (6.35029318 kg). England and other Germanic-speaking countries of northern Europe formerly used various standardised "stones" for trade, with their values ranging from about 5 to 40 local pounds (roughly 3 to 15 kg) depending on the location and objects weighed. The United Kingdom's imperial system adopted the wool stone of 14 pounds in 1835. With the advent of metrication, Europe's various "stones" were superseded by or adapted to the kilogram from the mid-19th century on. The stone continues in customary use in Britain and Ireland used for measuring body weight, but was prohibited for commercial use in the UK by the Weights and Measures Act of 1985.