What is the difference between quantity and quality?

quantity | quality |

As nouns the difference between quantity and quality

is that quantity is a fundamental, generic term used when referring to the measurement (count, amount) of a scalar, vector, number of items or to some other way of denominating the value of a collection or group of items while quality is (uncountable) level of excellence.

As a adjective quality is

being of good worth, well made, fit for purpose.

Other Comparisons: What's the difference?



  • A fundamental, generic term used when referring to the measurement (count, amount) of a scalar, vector, number of items or to some other way of denominating the value of a collection or group of items.
  • You have to choose between quantity and quality.
  • An indefinite amount of something.
  • Some soap making oils are best as base oils, used in a larger quantity''' in the soap, while other oils are best added in a small '''quantity .
    Olive oil can be used practically in any quantity .
  • A specific measured amount.
  • This bag would normally costs $497.50 for a quantity of 250, at a price of $1.99 per piece.
    Generally it should not be used in a quantity larger than 15 percent.
  • A considerable measure or amount.
  • The Boeing P-26A was the first all-metal monoplane fighter produced in quantity for the U.S. Army Air Corps.
  • (metrology) Property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed as number and a reference.
  • (mathematics) Indicates that the entire preceding expression is henceforth considered a single object.
  • x plus ''y'' quantity squared equals ''x'' squared plus ''2xy'' plus ''y'' squared .
  • * 2006 , Jerome E. Kaufmann and Karen Schwitters, Elementary and Intermediate Algebra: A Combined Approach , p 89
  • For problems 58-67, translate each word phrase into an algebraic expression.
    65. x plus 9, the quantity squared
  • * 2005 , R. Mark Sirkin, Statistics For The Social Sciences , p137
  • The second, (\sum x)^2, read "summation of x, quantity squared," tells us to first add up all the xs to get \sum x and then square \sum x to get (\sum x)^2.
  • * 1985 , Serge Lang, Math!: Encounters with High School Students , p54
  • ANN. ra quantity cubed.
    SERGE LANG. That's right, (ra)^3.

    Usage notes

    * In mathematics, used to unambiguously orate mathematical equations; it is extremely rare in print, since there is no need for it there.


    * Qty

    See also

    * measure * unit




  • (uncountable) Level of excellence
  • This school is well-known for having teachers of high quality .
    Quality of life is usually determined by health, education, and income.
  • *
  • (countable) A property or an attribute that differentiates a thing or person.
  • One of the qualities of pure iron is that it does not rust easily.
    While being impulsive can be great for artists, it is not a desirable quality for engineers.
    Security, stability, and efficiency are good qualities of an operating system.
  • *
  • (archaic) High social position. (See also the quality.)
  • A peasant is not allowed to fall in love with a lady of quality .
    Membership of this golf club is limited to those of quality and wealth.
  • (uncountable) The degree to which a man-made object or system is free from bugs and flaws, as opposed to scope of functions or quantity of items.
  • (thermodynamics) In a two-phase liquid–vapor mixture, the ratio of the mass of vapor present to the total mass of the mixture.
  • (emergency medicine, countable) The third step in OPQRST where the responder investigates what the NOI/MOI feels like.
  • To identify quality try asking, "what does it feel like?".

    Usage notes

    * Adjectives often applied to "quality": high, good, excellent, exceptional, great, outstanding, satisfactory, acceptable, sufficient, adequate, poor, low, bad, inferior, dubious, environmental, visual, optical, industrial, total, artistic, educational, physical, musical, chemical, spiritual, intellectual, architectural, mechanical.


    * See also

    Coordinate terms

    * (a property that differentiates) quiddity

    Derived terms

    (quality) * human quality * industrial quality * quality time * quality of life * the quality, the Quality * total quality management * qualitative


    (en adjective)
  • Being of good worth, well made, fit for purpose.
  • We only sell quality products.
    That was a quality game by Jim Smith.
    A quality system ensures products meet customer requirements.
  • * Harriet (a Cambridge University student), quoted in John Ahier, John Beck, Rob Moore, Graduate Citizens?: Issues of Citizenship and Higher Education , Routledge (2003), ISBN 978-0-415-25722-0, page 114:
  • I mean a lot of the money that obviously goes into universities and their libraries and their facilities and their academics and stuff but I mean I haven’t had a very quality degree to be honest. I think the quality of my education has been crap . . .
  • * 2004 , Vance M. Thompson, MD, in J. Kevin Belville and Ronald J. Smith (editors), LASIK Techniques: Pearls and Pitfalls , SLACK Incorporated, ISBN 978-1-55642-622-3, page 187:
  • For one I wanted to have what I considered a very quality tracking device.
  • * 2008 , Carl Erskine, in Fay Vincent, We Would Have Played for Nothing: Baseball Stars of the 1950s and 1960s Talk About the Game They Loved , Simon and Schuster, ISBN 978-1-4165-5342-7, page 144:
  • A very quality ball club; that was the Braves.

    Derived terms

    * qualityness