Convert Kilogram to Centigram
Convert kilograms to centigrams instantly. 1 kilogram = 100000 centigram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Centigram 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.
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.
Kilogram to Centigram conversion formula
The relationship between kilograms and centigrams:
To convert kilograms to centigrams, multiply the value in kilograms by 100000. To reverse, multiply centigrams by 1e-5.
How to use this converter
Type a value into the calculator. The result in centigrams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Centigram to Kilogram converter for the reverse direction.
Step-by-step: convert kilograms to centigrams
- Write down the value in kilograms (kg).
- Multiply that value by the factor 100000.
- The product is the equivalent value in centigrams (cg).
- To reverse, multiply the centigram value by 1e-5.
Worked examples
Example 1 — Convert 1 kg to cg:
1 × 100000 = 100000 cg
Example 2 — Convert 100 kg to cg:
100 × 100000 = 9999999.9999999981 cg
Real-world example — Macro-to-micro scale comparison
2 kilograms of measurement converts to a very large number in centigrams — useful in materials science when comparing bulk-sample dimensions to feature-level surface specs.
2 kg × 100000 = 200000 cg
Real-world example — Macroscopic to microscopic
One kilogram equals a million centigrams. Optical engineers calculating coherence length compare macro-scale path lengths with micro-scale wavelength differences using exactly this conversion.
1 kg × 100000 = 100000 cg
Real-world example — Sub-meter precision
A 0.001-kilogram (1 mm) tolerance equals 1,000 centigrams — useful for surface-finish specs, where macro-scale dimensions are given in the larger unit but feature roughness in the smaller.
0.001 kg × 100000 = 100 cg
Kilogram to Centigram conversion table
Standard reference values for converting kilograms to centigrams:
| Kilogram [kg] | Centigram [cg] |
|---|---|
| 0.01 | 1000 |
| 0.1 | 10000 |
| 1 | 100000 |
| 2 | 200000 |
| 3 | 299999.9999999999 |
| 4 | 399999.9999999999 |
| 5 | 499999.9999999999 |
| 10 | 999999.9999999999 |
| 20 | 1999999.9999999998 |
| 30 | 2999999.9999999995 |
| 40 | 3999999.9999999995 |
| 50 | 4999999.9999999991 |
| 100 | 9999999.9999999981 |
| 500 | 5e+7 |
| 1000 | 1e+8 |
Frequently asked questions
How many centigrams is 1 kilogram?
How do I convert kilograms to centigrams?
How do I convert centigrams back to kilograms?
How many centigrams is 100 kilograms?
Popular weight unit conversions
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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 = 100000 cg) 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.