Hundred to Pairs (100 to pr)

1 hundred equals 50 pairs exactly.

How to convert hundred to pairs

To convert hundred to pairs, multiply the number of hundred by 50. This factor is exact. To go the other way, multiply pairs by 0.02.

pairs = hundred × 50

Example: 10 hundred = 500 pairs.

Large-number names differ around the world: this site uses the short scale (billion = 10⁹) by default, and lists the long-scale billion separately.

About these units

Hundred (100)

General & non-SICurrent unit

One hundred.

The English word hundred descends from Old English hundred and, further back, from a Proto-Germanic compound that joined the old root for 100 with a word meaning count or row. For much of history it did not always mean 100. Old Norse counted large numbers in twelves of tens, and medieval England used a long hundred of 120 beside the short hundred of 100. Around 1300 the Assize of Weights and Measures had both in play: a hundred kippers or a hundred ells of hemp canvas or linen meant 120, while a hundred fresh herring meant 100.

The word also named a historical subdivision of southern English counties, notionally 12,000 acres. Today a hundred is simply ten tens, five score, or a tenth of a thousand, and the SI prefix hecto stands for 10². The long hundred faded as Arabic numerals, which rely on base 10, spread from the 14th century onward.

1 hundred = 100 pieces (exactly).

Sources: Wiktionary: hundred; Wikipedia: Long hundred; BIPM SI Brochure, 9th edition (2019)

Pair (pr)

General & non-SICurrent unit

Two items.

Pair comes from Old French paire, which grew out of Latin paria, the neuter plural of par, meaning equal. German Paar and Dutch paar are relatives of the same word. The core idea is two matching things taken together, as in a pair of shoes or gloves.

English also uses pair for single objects built from two connected parts. Scissors, spectacles, trousers, and jeans are plural-only nouns, so a counting word is needed: you say a pair of scissors or several pairs of jeans. That makes the unit slightly slippery. Six pairs of socks is 12 socks, but six pairs of scissors is only six objects. The word has other senses too, such as two people in a relationship or two cards of equal rank in poker, but as a quantity of loose items it is always two.

1 pair = 2 pieces (exactly).

Sources: Wiktionary: pair

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