Convert Centigram to Carat (metric)
Convert centigrams to carats (metric) instantly. 1 centigram = 0.05 carat (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Carat (metric) to Centigram converter for the reverse conversion.
Units explained
Centigram
A centigram (cg) equals 0.00001 kilogram, or 0.01 gram.
From the SI prefix 'centi-' (from Latin 'centum', hundred).
Used in pharmacology and analytical chemistry.
Part of the original metric system of 1795.
Carat (metric)
The metric carat (ct) equals exactly 200 milligrams (0.0002 kg).
From Arabic 'qirat' and Greek 'keration', the carob seed once used as a counterweight.
The worldwide standard for gemstone and diamond mass.
The metric carat was fixed at 200 mg internationally in 1907.
Centigram to Carat (metric) conversion formula
The relationship between centigrams and carats (metric):
To convert centigrams to carats (metric), multiply the value in centigrams by 0.05. To reverse, multiply carats (metric) by 20.
How to use this converter
Type a value into the calculator. The result in carats (metric) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Carat (metric) to Centigram converter for the reverse direction.
Step-by-step: convert centigrams to carats (metric)
- Write down the value in centigrams (cg).
- Multiply that value by the factor 0.05.
- The product is the equivalent value in carats (metric) (ct).
- To reverse, multiply the carat (metric) value by 20.
Worked examples
Example 1 — Convert 1 cg to ct:
1 × 0.05 = 0.05 ct
Example 2 — Convert 100 cg to ct:
100 × 0.05 = 5 ct
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 centigrams), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 cg × 0.05 = 0.15 ct
Real-world example — Plastic-film thickness alternates
A 150-centigram plastic film converts cleanly to carats (metric) — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 cg × 0.05 = 7.5 ct
Real-world example — Hair-width scale measurements
A 70-centigram measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like carats (metric) for direct comparison across supplier datasheets.
70 cg × 0.05 = 3.5 ct
Centigram to Carat (metric) conversion table
Standard reference values for converting centigrams to carats (metric):
| Centigram [cg] | Carat (metric) [ct] |
|---|---|
| 0.01 | 0.0005 |
| 0.1 | 0.005 |
| 1 | 0.05 |
| 2 | 0.1 |
| 3 | 0.15 |
| 4 | 0.2 |
| 5 | 0.25 |
| 10 | 0.5 |
| 20 | 1 |
| 30 | 1.5 |
| 40 | 2 |
| 50 | 2.5 |
| 100 | 5 |
| 500 | 25 |
| 1000 | 50 |
Frequently asked questions
How many carats (metric) is 1 centigram?
How do I convert centigrams to carats (metric)?
How do I convert carats (metric) back to centigrams?
How many carats (metric) is 100 centigrams?
Popular weight unit conversions
Convert Centigram to other weight units
Show all Centigram conversions
Metric / SI (17 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 cg = 0.05 ct) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.