Convert Kilogram to Carat (metric)
Convert kilograms to carats (metric) instantly. 1 kilogram = 5000 carat (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Carat (metric) to Kilogram converter for the reverse conversion.
Units explained
Kilogram
The kilogram (kg) is the SI base unit of mass, defined by fixing the Planck constant h at 6.62607015E-34 J s.
From Greek 'khilioi' (thousand) plus 'gramma' (small weight).
The worldwide base unit of mass in science, commerce, and everyday life.
Adopted in 1795; redefined through the Planck constant on 20 May 2019.
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.
Kilogram to Carat (metric) conversion formula
The relationship between kilograms and carats (metric):
To convert kilograms to carats (metric), multiply the value in kilograms by 5000. To reverse, multiply carats (metric) by 0.0002.
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 Kilogram converter for the reverse direction.
Step-by-step: convert kilograms to carats (metric)
- Write down the value in kilograms (kg).
- Multiply that value by the factor 5000.
- The product is the equivalent value in carats (metric) (ct).
- To reverse, multiply the carat (metric) value by 0.0002.
Worked examples
Example 1 — Convert 1 kg to ct:
1 × 5000 = 5000 ct
Example 2 — Convert 100 kg to ct:
100 × 5000 = 500000 ct
Real-world example — Sub-meter precision
A 0.001-kilogram (1 mm) tolerance equals 1,000 carats (metric) — useful for surface-finish specs, where macro-scale dimensions are given in the larger unit but feature roughness in the smaller.
0.001 kg × 5000 = 5 ct
Real-world example — Macro-to-micro scale comparison
2 kilograms of measurement converts to a very large number in carats (metric) — useful in materials science when comparing bulk-sample dimensions to feature-level surface specs.
2 kg × 5000 = 10000 ct
Real-world example — Macroscopic to microscopic
One kilogram equals a million carats (metric). Optical engineers calculating coherence length compare macro-scale path lengths with micro-scale wavelength differences using exactly this conversion.
1 kg × 5000 = 5000 ct
Kilogram to Carat (metric) conversion table
Standard reference values for converting kilograms to carats (metric):
| Kilogram [kg] | Carat (metric) [ct] |
|---|---|
| 0.01 | 50 |
| 0.1 | 500 |
| 1 | 5000 |
| 2 | 10000 |
| 3 | 15000 |
| 4 | 20000 |
| 5 | 25000 |
| 10 | 50000 |
| 20 | 100000 |
| 30 | 150000 |
| 40 | 200000 |
| 50 | 250000 |
| 100 | 500000 |
| 500 | 2500000 |
| 1000 | 5000000 |
Frequently asked questions
How many carats (metric) is 1 kilogram?
How do I convert kilograms to carats (metric)?
How do I convert carats (metric) back to kilograms?
How many carats (metric) is 100 kilograms?
Popular weight unit conversions
Convert Kilogram to other weight units
Show all Kilogram 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 kg = 5000 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.