Convert Gigagram to Carat (metric)
Convert gigagrams to carats (metric) instantly. 1 gigagram = 5e+9 carat (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Carat (metric) to Gigagram converter for the reverse conversion.
Units explained
Gigagram
A gigagram (Gg) equals 10^6 kilograms, the same as 1,000 metric tons.
From the SI prefix 'giga-' (from Greek 'gigas', giant).
Bulk commodity, emissions, and freight accounting.
The giga- prefix entered the SI in 1960.
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.
Gigagram to Carat (metric) conversion formula
The relationship between gigagrams and carats (metric):
To convert gigagrams to carats (metric), multiply the value in gigagrams by 5e+9. To reverse, multiply carats (metric) by 2e-10.
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 Gigagram converter for the reverse direction.
Step-by-step: convert gigagrams to carats (metric)
- Write down the value in gigagrams (Gg).
- Multiply that value by the factor 5e+9.
- The product is the equivalent value in carats (metric) (ct).
- To reverse, multiply the carat (metric) value by 2e-10.
Worked examples
Example 1 — Convert 1 Gg to ct:
1 × 5e+9 = 5e+9 ct
Example 2 — Convert 100 Gg to ct:
100 × 5e+9 = 5e+11 ct
Gigagram to Carat (metric) conversion table
Standard reference values for converting gigagrams to carats (metric):
| Gigagram [Gg] | Carat (metric) [ct] |
|---|---|
| 0.01 | 5e+7 |
| 0.1 | 5e+8 |
| 1 | 5e+9 |
| 2 | 1e+10 |
| 3 | 1.5e+10 |
| 4 | 2e+10 |
| 5 | 2.5e+10 |
| 10 | 5e+10 |
| 20 | 1e+11 |
| 30 | 1.5e+11 |
| 40 | 2e+11 |
| 50 | 2.5e+11 |
| 100 | 5e+11 |
| 500 | 2.5e+12 |
| 1000 | 5e+12 |
Frequently asked questions
How many carats (metric) is 1 gigagram?
How do I convert gigagrams to carats (metric)?
How do I convert carats (metric) back to gigagrams?
How many carats (metric) is 100 gigagrams?
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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 Gg = 5e+9 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.