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    Convert Ounces to Carats

    1 ounce (oz) equals 141.7476156 carats (ct).

    oz
    Swap: convert carats to ounces
    ct

    1 oz = 141.7476156 ct

    Type in either box. Scientific notation works: 1.5e-3.

    Converting a list? Use the bulk ounce to carat converter to paste a column from Excel.

    How to Convert Ounce to Carat

    • 1 oz = 141.7476156 ct
    • 1 ct = 0.00705479239 oz
    • Example: convert 15 oz to ct: 15 oz = 15 × 141.7476156 ct = 2126.214234 ct

    Reference conditions. oz: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).

    Formula

    ct = oz × 141.747615625

    Derivation from SI units:

    • 1 oz = 1/16 lb = 28.349523125 g (exact)
    • 1 ct = 200 mg (metric carat, exact)
    • 1 oz = 0.028349523125 kg ÷ 0.0002 kg per ct = 141.747615625 ct

    Both units are defined exactly, so the factor is exact. Ounce definition: ounce; Carat definition: carat.

    Worked examples

    1. A reading of 4 oz converts to 566.9904625 ct.
      4 oz × 141.7476156 = 566.9904625 ct
    2. A value of 12 oz is 1700.971388 ct.
      12 oz × 141.7476156 = 1700.971388 ct

    Ounce to Carat conversion table

    Ounce to Carat conversion table
    Ounces (oz)Carats (ct)
    0.25 oz35.43690391 ct
    0.5 oz70.87380781 ct
    1 oz141.7476156 ct
    2 oz283.4952313 ct
    3 oz425.2428469 ct
    4 oz566.9904625 ct
    5 oz708.7380781 ct
    6 oz850.4856938 ct
    8 oz1133.980925 ct
    10 oz1417.476156 ct
    12 oz1700.971388 ct
    16 oz2267.96185 ct
    20 oz2834.952313 ct
    24 oz3401.942775 ct
    32 oz4535.9237 ct
    64 oz9071.8474 ct

    Where it's used

    Ounces are used for food and parcel weights in the US, while carats appear in diamonds and gemstones. Both measure mass (commonly called weight), so the conversion is a fixed factor.

    Ounce to other weight and mass units

    1 oz expressed in every weight and mass unit
    Conversion1 oz equals
    ounce to kilogram 0.02834952313 kg
    ounce to gram 28.34952313 g
    ounce to milligram 28349.52313 mg
    ounce to microgram 28349523.13 µg
    ounce to metric ton 0.00002834952313 t
    ounce to pound 0.0625 lb
    ounce to stone 0.004464285714 st
    ounce to short ton 0.00003125 ton (US)
    ounce to long ton 0.00002790178571 ton (UK)
    ounce to grain 437.5 gr
    ounce to troy ounce 0.9114583333 oz t
    ounce to carat 141.7476156 ct

    Frequently asked questions

    How many carats are in 1 ounce?

    1 oz = 141.7476156 ct.

    How do I convert ounces to carats?

    Multiply the value in oz by 141.7476156. For example, 15 oz × 141.7476156 = 2126.214234 ct.

    Is the oz to ct conversion exact?

    Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).

    Sources

    Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.

    Cite this page

    APA

    Scientific Converters. (2026, October 15). Convert Ounces to Carats. Retrieved October 17, 2026, from https://scientificconverters.com/mass/ounces-to-carats/

    IEEE

    Scientific Converters, "Convert Ounces to Carats," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/ounces-to-carats/