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Milligrams to Carats Converter

Convert milligrams to carats and carats to milligrams instantly. Bidirectional weight converter for gemstone measurements.

mg

Carats

7.5

ct

1500 mg = 7.5 ct

ct = mg × 0.005

Milligrams to Carats: 1 mg equals 0.005 ct. To convert milligrams to carats, multiply by 0.005 (ct = mg × 0.005). For example, 10 mg = 0.05 ct.

How to Convert Milligrams to Carats

To convert from milligrams to carats, multiply the value by 0.005. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Milligrams to Carats: ct = mg × 0.005
  • Carats to Milligrams: mg = ct ÷ 0.005

Milligrams to Carats Conversion Chart

Milligrams (mg)Carats (ct)
0.10.0005
0.250.00125
0.50.0025
10.005
20.01
30.015
50.025
100.05
200.1
250.125
500.25
1000.5
2501.25
10005

Understanding the Units

What is a Milligram?

A milligram is one thousandth of a gram (1 mg = 0.001 g = 10⁻⁶ kg).

Common contexts: pharmaceutical dosing, nutrition labeling, analytical chemistry.

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FAQ

How many milligrams in a carat?

One carat equals exactly 200 milligrams (0.2 grams).

How do I convert milligrams to carats?

Multiply the milligram value by 0.005 or divide by 200. For example, 1,500 mg = 7.5 carats.

Why is this conversion important?

Essential in gemology and jewelry making. Gemstones are weighed in carats, and precision instruments often report in milligrams.

Is the carat definition exact?

Yes. The metric carat was standardized at exactly 200 mg (0.2 g) in 1907, making the mg-to-carat conversion perfectly exact.

How many carats are in 1 milligram?

1 mg equals 0.005 ct.

How do you convert milligrams to carats?

Multiply the milligram value by 0.005. Formula: ct = mg × 0.005.

How many carats are in 5 milligrams?

5 mg = 0.025 ct.

How do you convert carats back to milligrams?

Use the inverse formula: mg = ct ÷ 0.005. For example, 1 ct = 200 mg.