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Weight

Convert ounces to carats

1 oz=141.748ct

Use the converter below to change any ounces value into carats instantly — with formula, conversion table, and real-world examples.

141.7476

Conversion formula

Forward
carats = ounces × 141.748
Reverse
ounces = carats × 0.007055

Example: 10 oz × 141.748 = 1,417.48 ct.

About both units

From

Ounce

oz

The ounce equals 28.35 grams and is 1/16 of a pound. It is common in American and British cooking for small ingredient weights. The fluid ounce (29.57 ml in the US, 28.41 ml in the UK) is a volume unit and is completely different from the mass ounce.

Real-world: A US tin of tuna is 5 oz (142 g). A Starbucks grande coffee is 16 fl oz (473 ml). Gold is traded in troy ounces (31.10 g).
Read full ounce reference →
To

Carat

ct

The metric carat equals 200 milligrams exactly. It is the standard unit for gemstone weight — diamonds, rubies, sapphires and emeralds are sold by the carat. Do not confuse with the purity carat (karat) used for gold (24K = pure gold).

Real-world: A 1-carat diamond weighs 200 mg and is typically 6.5 mm across. The Hope Diamond is 45.52 carats (9.1 g).
Read full carat reference →

Ounce to Carat conversion table

Common ounces to carats values for quick reference.

Ounce (oz)Carat (ct)
1 oz141.748 ct
5 oz708.738 ct
10 oz1,417.48 ct
25 oz3,543.69 ct
50 oz7,087.38 ct
100 oz14,174.76 ct
250 oz35,436.9 ct
500 oz70,873.81 ct
1,000 oz141,747.62 ct
5,000 oz708,738.08 ct

Tips & common mistakes

Quick tips

  • 1 oz = 28.35 g exactly (avoirdupois); 1 troy oz = 31.10 g.
  • 16 oz = 1 lb in the avoirdupois system used for food.
  • When converting a US recipe, 1 oz ≈ 2 tablespoons of a liquid ingredient.

Avoid these

  • Confusing mass ounces (28.35 g) with fluid ounces (volume).
  • Using avoirdupois ounces (28.35 g) for precious-metal pricing — gold is in troy ounces (31.10 g).
  • Multiplying lb × 16 and calling the result oz — correct only for weight, not volume.

Frequently asked questions

How many carats in a ounce?
One ounce equals 141.748 carats.
How do I convert ounces to carats?
Multiply the ounce value by 141.748 to get the equivalent in carats.
What is 100 ounces in carats?
100 ounces equals 14,174.76 carats.
Is a ounce bigger than a carat?
Yes. 1 ounce equals 141.748 carats, so one ounce is larger.
How to convert ounces to carats without a calculator?
Multiply by 141.75 for a quick estimate; use a calculator for precise results.

Related weight conversions

📊 See full comparison matrix →

More from Ounce

oz → kg
1 = 0.02835 kg
oz → g
1 = 28.3495 g
oz → mg
1 = 28,349.52 mg
oz → µg
1 = 28,349,523.13 µg
oz → lb
1 = 0.0625 lb
oz → t
1 = 2.8350e-5 t
oz → ton (US)
1 = 3.1250e-5 ton (US)
oz → ton (UK)
1 = 2.7902e-5 ton (UK)

More to Carat

kg → ct
1 = 5,000 ct
g → ct
1 = 5 ct
mg → ct
1 = 0.005 ct
µg → ct
1 = 5.0000e-6 ct
lb → ct
1 = 2,267.96 ct
t → ct
1 = 5,000,000 ct
ton (US) → ct
1 = 4,535,923.7 ct
ton (UK) → ct
1 = 5,080,234.54 ct

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