Weight conversion
Milligram to Carat converter
Convert mg to ct instantly, choose the displayed precision, and verify the result with the formula and reference table below.
Carat (ct)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Calculation
Milligram to Carat formula
ct = mg × 0.005
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 mg, the result is 0.05 ct. Substitute 10 mg into the formula to obtain 0.05 ct.
A numerical value expressed in carat is usually smaller than the same measurement expressed in milligram, because 1 mg equals 0.005 ct.
Milligram to Carat reference table
Common values rounded to a maximum of 6 decimal places.
| Milligram (mg) | Carat (ct) |
|---|---|
| 1 mg | 0.005 ct |
| 5 mg | 0.025 ct |
| 10 mg | 0.05 ct |
| 50 mg | 0.25 ct |
| 100 mg | 0.5 ct |
Understanding the units
About Milligram and Carat
Milligram (mg)
One milligram (mg) equals 0.000001 kg, the base relationship used for this weight conversion.
Carat (ct)
One carat (ct) equals 0.0002 kg, the base relationship used for this weight conversion.
When this conversion is useful
Milligram to Carat conversion is useful for shipping, recipes, product specifications, laboratory work, and body-weight records. It lets you compare the same mass or weight across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
Metric vs Imperial Units: A Practical Comparison
Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →FoundationsSignificant Figures and Rounding in Unit Conversions
Learn when to round conversion results, how significant figures preserve measurement meaning, and why more decimals do not guarantee more accuracy.
Read guide →Answers at a glance
Frequently asked questions
How do you convert Milligram to Carat?
Use the formula ct = mg × 0.005. Enter any value in the converter above to calculate the result instantly.
How many carat are in one milligram?
One milligram equals 0.005 carat.
How does Convr round Milligram to Carat results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal milligram values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
Keep converting