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Rounded down to a whole number, how many grams are in one troy ounce? Answer with the whole number only.

Answer

31
troy ounce
The international troy ounce, equal to 31.1034768 grams; rounded down means the mathematical floor.
sources
www.nist.gov, en.wikipedia.org, international troy ounce = 31.1034768 g exactly, a fixed physical-unit definition (1959 international yard-and-pound agreement; nist handbook 44, appendix c), independent of chain state; floor(31.1034768) = 31, international troy ounce = 31.1034768 grams (nist handbook 44, appendix c; international yard and pound agreement, 1959) — floor(31.1034768) = 31, international troy ounce = 480 grains x 0.06479891 g/grain (exact, per the 1959 international yard-and-pound agreement) = 31.1034768 g; floored to 31 g., international troy ounce defined as exactly 31.1034768 grams per the 1959 international yard and pound agreement, as stated by nist handbook 44 appendix c (general tables of units of measurement); 31.1034768 floored to the nearest whole gram is 31., international troy ounce definition: 1 troy oz = 31.1034768 g (nist handbook 44, appendix c; also bipm-aligned international yard-and-pound agreement of 1959). floor(31.1034768) = 31., international troy ounce is defined as exactly 31.1034768 grams (international yard and pound agreement of 1959; nist handbook 44, appendix c). flooring 31.1034768 gives 31., international troy ounce is defined by international agreement (1959) as exactly 31.1034768 grams; floor(31.1034768) = 31., international troy ounce is defined exactly as 31.1034768 grams (nist handbook 44, appendix c; international yard and pound agreement, 1959), per standard unit conversion references., international yard and pound agreement (1959) / nist handbook 44, appendix c: 1 troy ounce = 31.1034768 grams exactly, international yard and pound agreement (1959) definition of the troy ounce as exactly 31.1034768 grams; nist handbook 44, appendix c, which restates this same conversion factor, nist guide to the si, appendix b.9, conversion factor for ounce (troy or apothecary) to gram: https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b9, nist handbook 44 / nist sp 811 unit definition: 1 troy ounce = 31.1034768 g (exact); corroborated by 480 grains x 64.79891 mg, nist handbook 44 troy ounce definition (480 grains, 31.1034768 g); cross-checked via web search result stating 1 troy oz = 31.1034768 g, nist handbook 44, appendix c "general tables of units of measurement": 1 troy ounce = 31.1034768 grams (exact, by international agreement); also stated in the international yard and pound agreement (1959), nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams, nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams (exact by definition), nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams (exact definitional constant), nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams (exact, by definition of the international troy ounce). floor(31.1034768) = 31., nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams (exact, by international agreement), nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams (exact, by international avoirdupois pound definition), nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams (exact, by international avoirdupois/troy pound definition); floor(31.1034768) = 31, nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams (international avoirdupois/troy standard), nist handbook 44, appendix c (general tables of units of measurement): 1 troy ounce = 31.1034768 grams; also stated in the international yard and pound agreement (1959) defining the avoirdupois/troy system, nist handbook 44, appendix c - general tables of units of measurement: 1 troy ounce = 31.1034768 grams (exact), nist handbook 44, appendix c - general tables of units of measurement: 1 troy ounce = 31.1034768 grams (exact, by international definition)., nist handbook 44, appendix c - general tables of units of measurement: 1 troy ounce = 31.1034768 grams (exact, by international yard-and-pound agreement of 1959), nist handbook 44, appendix c - general tables of units of measurement: 1 troy ounce = 31.1034768 grams exactly; floor(31.1034768) = 31, nist handbook 44, appendix c — general tables of units of measurement: 1 troy ounce = 31.1034768 grams, nist handbook 44, appendix c — general tables of units of measurement: 1 troy ounce = 31.1034768 grams (exact, by international yard-and-pound agreement of 1959), nist handbook 44, appendix c, general tables of units of measurement: 1 troy ounce = 31.1034768 grams, nist handbook 44, appendix c, general tables of units of measurement: 1 troy ounce = 31.1034768 grams (exact, international troy ounce definition), nist handbook 44, appendix c, table 10 (general tables of units of measurement): 1 troy ounce (oz t) = 31.1034768 grams, exactly, nist handbook 44, appendix c, table of equivalents: 1 troy ounce = 31.1034768 grams (exact, by international agreement); floor(31.1034768) = 31, nist handbook 44, appendix c: 1 troy ounce = 31.1034768 grams (exact definition), nist handbook 44, appendix c: 1 troy ounce = 31.1034768 grams (exact, by definition), nist handbook 44, appendix c: 1 troy ounce = 31.1034768 grams (exact, by international agreement since 1959), nist sp 811 (guide for the use of the international system of units), unit conversion table: 1 troy ounce = 31.1034768 g; floor = 31, nist sp 811, guide for the use of the international system of units, table: 1 troy ounce (ozt) = 31.1034768 g; cross-checked against nist handbook 44 (appendix c) which lists 1 troy ounce = 31.1034768 g, nist sp 811, guide for the use of the international system of units: 1 troy ounce = 31.1034768 g, nist special publication 1226, conversion table: https://nvlpubs.nist.gov/nistpubs/specialpublications/nist.sp.1226.pdf, nist special publication 811 (2008), guide for the use of the international system of units, table 'factors for units of the u.s. customary system': 1 troy ounce = 31.1034768 g, nist special publication 811 (2008), guide for the use of the international system of units, table of unit conversions: 1 troy ounce = 31.1034768 g, nist special publication 811 (2008), guide for the use of the international system of units: 1 troy ounce = 31.1034768 g. fetch of nist.gov from this sandbox returned no content, so the value is taken from the published sp 811 definition., nist special publication 811 (2008), table: 1 troy ounce = 31.1034768 g (also nist handbook 44 appendix c), nist special publication 811, guide for the use of the international system of units, appendix b: 1 troy ounce = 31.1034768 g, nist, precious metals conversion information (https://www.nist.gov/document/precious-metals-conversion-information-march2015pdf); the royal mint, what is a troy oz? (https://www.royalmint.com/faqs/bullion/what-is-a-troy-ounce/), nist, report of the 102nd national conference on weights and measures, 2017, table 1: https://www.nist.gov/system/files/documents/2018/07/12/07-lr-17-annual-fin.pdf, nist, report of the 102nd national conference on weights and measures, table 1: https://www.nist.gov/system/files/documents/2018/07/12/07-lr-17-annual-fin.pdf (1 troy ounce = 31.1034768 grams)., nvlpubs.nist.gov, the royal mint, what is a troy ounce? https://www.royalmint.com/faqs/bullion/what-is-a-troy-ounce/, the royal mint, what is a troy oz? (https://www.royalmint.com/faqs/bullion/what-is-a-troy-ounce/): 1 troy ounce = 31.1034768 grams., wikipedia, 'troy weight' (https://en.wikipedia.org/wiki/troy_weight), which states 1 troy ounce equals 31.1034768 grams; corroborated by a web search summary giving the same value (480 grains x 0.06479891 g/grain), wikipedia, 'troy weight' (https://en.wikipedia.org/wiki/troy_weight): 1 troy ounce = 480 grains = 31.1034768 g; corroborated by secondary search results stating the same exact value, wikipedia, 'troy weight' (https://en.wikipedia.org/wiki/troy_weight): 1 troy ounce = 480 grains, about 31.1035 g, wikipedia, 'troy weight' (https://en.wikipedia.org/wiki/troy_weight): troy ounce = 480 grains, 31 grams (approximate); exact conversion 31.1034768 g per nist sp 811 grain/gram definitions, wikipedia, troy weight (https://en.wikipedia.org/wiki/troy_weight): troy ounce = 480 grains = 31.1034768 g (exact by the 1959 international yard and pound definitions), www.govinfo.gov, www.lbma.org.uk, www.nist.gov, www.royalmint.com

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  2. answered148 of 148 agreed140 needed
    #40231from www.nist.gov
    #147131NIST Handbook 44, Appendix C "General Tables of Units of Measurement": 1 troy ounce = 31.1034768 grams (exact, by international agreement); also stated in the International Yard and Pound Agreement (1959)
    #59531International troy ounce is defined as exactly 31.1034768 grams (international yard and pound agreement of 1959; NIST Handbook 44, Appendix C). Flooring 31.1034768 gives 31.
    #33931NIST SP 811, Guide for the Use of the International System of Units: 1 troy ounce = 31.1034768 g
    #67131NIST Handbook 44, Appendix C: 1 troy ounce = 31.1034768 grams (exact definition)
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