Quantity Converter
Convert between dozen, score, gross, pair, half dozen, and baker's dozen with this free online quantity converter. Get instant results with a complete unit breakdown table.
About This Calculator
Our free online Quantity Converter helps you convert between different historical and modern quantity units instantly. Whether you need to know how many items are in a dozen, how much a score is, or how to convert grosses to great grosses, this tool provides accurate results with a complete breakdown across all quantity units.
This converter is ideal for students learning about historical measurement systems, bakers working with dozen-based orders, wholesale traders managing inventory in grosses, and anyone dealing with non-standard quantity units. Simply enter your value, select the unit you are converting from, and click Convert.
How It Works
The converter uses standard quantity unit relationships: 1 pair = 2 units, 1 half dozen = 6 units, 1 dozen = 12 units, 1 baker's dozen = 13 units, 1 score = 20 units, 1 gross = 144 units (12 dozen), and 1 great gross = 1,728 units (12 gross). The value is first converted to base units, then divided by each unit's multiplier to show all equivalent values.
Regional Notes
Worldwide: Dozen, score, and gross are used globally in various contexts. The dozen is universal for counting eggs, baked goods, and flowers. The score is most commonly associated with historical references. The gross is used in wholesale and manufacturing worldwide. The baker's dozen originated in England but is recognized internationally.
United Kingdom: The term 'stone' (14 pounds) follows a similar grouping tradition. The UK also uses 'half dozen' commonly in food retail.
United States: Dozens are ubiquitous in grocery stores for eggs and baked goods. The gross is used in manufacturing and wholesale for small parts and fasteners.
India: While the metric system is standard, dozens are commonly used for eggs, fruits, and flowers in Indian markets. The term 'gross' is used in textile and manufacturing industries.
Frequently Asked Questions
How many items are in a dozen?
A dozen contains 12 items. Dozen is one of the oldest grouping measures originating in Mesopotamia, based on the twelve cycles of the moon or the number of months in a year. It is commonly used for eggs, baked goods, flowers, and other items sold in groups.
What is a baker's dozen?
A baker's dozen is 13 items, one more than a regular dozen. This tradition comes from medieval England where bakers would add an extra item to avoid penalties for underweight bread. It is also called devil's dozen, long dozen, or long measure.
How much is a score?
A score is 20 items. The term is famously used in Abraham Lincoln's Gettysburg Address which begins "Four score and seven years ago", meaning 87 years. Scores are still used in some contexts for counting livestock and in historical references.
What is a gross in quantity measurement?
A gross is 144 items, which is 12 dozen (12 squared). A great gross is 1,728 items, or 12 gross (12 cubed). These units are used in wholesale trade, manufacturing, and inventory management for counting large quantities of small items like buttons, pencils, or screws.
How many items are in half a dozen?
Half a dozen contains 6 items. It is commonly used when a full dozen is more than needed, such as half a dozen eggs, donuts, or roses. The phrase "half a dozen" is also used idiomatically to mean approximately six.
What is a pair in quantity measurement?
A pair (also called a couple or brace) contains 2 items. Pairs are used for items that naturally come in twos such as shoes, socks, gloves, earrings, and animals. In hunting, "a brace of pheasants" means two pheasants.
Why is 12 such a common grouping number?
The number 12 is convenient because it has many divisors: 1, 2, 3, 4, 6, and 12. This makes it easy to divide a dozen into halves, thirds, or quarters. Twelve is also a base in the duodecimal system and appears in imperial measurements like 1 foot = 12 inches.
Is this quantity converter free to use?
Yes, all calculators on Calculy are completely free to use with no registration required. You can convert between dozen, score, gross, pair, half dozen, baker's dozen, and great gross instantly online from any device.