Carat to Milligram Converter
Weight · unit-converter
Convert Carat to Milligram with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use gram-based factors (international avoirdupois pound and metric definitions). The full Weight Converter also includes carat, grain, and US/UK hundredweight.
Calculator
From: Carat (ct)
To: Milligram (mg)
About Carat
The metric carat is exactly 0.2 grams (200 mg), commonly used for gemstones and jewelry.
About Milligram
The milligram is one thousandth of a gram. Medication doses and fine measurements use milligrams.
How to convert carats to milligrams
1 carat is equal to 200 milligram:
1 ct = (0.2 g ÷ 0.001 g) mg = 200 mg
Each carat is defined as 0.2 g and each milligram as 0.001 g, so one ct equals 0.2 ÷ 0.001 mg = 200 mg.
Let w(ct) be the numeric value of the same mass measured in Carat (ct), and w(mg) the value in Milligram (mg). Then:
w(mg) = w(ct) × (0.2 / 0.001)
Equivalently, divide by how many ct fit into one mg (grams per mg divided by grams per ct):
w(mg) = w(ct) ÷ 0.005
Or: milligram = carat ÷ 0.005
Examples
Example #1: Convert 20 ct to milligram
20 ct = 20 ct × (0.2/0.001) mg = 4000 mg
20 ct = 20 ct ÷ 0.005 = 4000 mg
Example #2: Convert 50 ct to milligram
50 ct = 50 ct × (0.2/0.001) mg = 10000 mg
50 ct = 50 ct ÷ 0.005 = 10000 mg
Summary
To convert Carat to Milligram, multiply the value in ct by the ratio of grams per ct divided by grams per mg. Equivalently: value_mg = value_ct × (0.2 / 0.001). Numerically, 1 ct equals 200 mg.
Relationship context
Both units are metric (SI) and tied to the gram via the kilogram. Conversions use exact ratios from their gram definitions. The factor from Carat to Milligram is 2.000000e+2 (1 ct = 200 mg).
Conversion tables
| Carat (ct) | Milligram (mg) |
|---|---|
| 0.1 | 20 |
| 1 | 200 |
| 2 | 400 |
| 3 | 600 |
| 4 | 800 |
| 5 | 1,000 |
| 6 | 1,200 |
| 7 | 1,400 |
| 8 | 1,600 |
| 9 | 1,800 |
| Carat (ct) | Milligram (mg) |
|---|---|
| 10 | 2,000 |
| 20 | 4,000 |
| 30 | 6,000 |
| 40 | 8,000 |
| 50 | 10,000 |
| 60 | 12,000 |
| 70 | 14,000 |
| 80 | 16,000 |
| 90 | 18,000 |
| 100 | 20,000 |