Convert Nanogram to Carat (metric)
Convert nanograms to carats (metric) instantly. 1 nanogram = 5e-9 carat (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Carat (metric) to Nanogram converter for the reverse conversion.
Units explained
Nanogram
A nanogram (ng) equals 10^-12 kilogram.
From the SI prefix 'nano-' (from Greek 'nanos', dwarf).
Molecular biology, forensics, and toxicology.
The nano- 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.
Nanogram to Carat (metric) conversion formula
The relationship between nanograms and carats (metric):
To convert nanograms to carats (metric), multiply the value in nanograms by 5e-9. To reverse, multiply carats (metric) by 2e+8.
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 Nanogram converter for the reverse direction.
Step-by-step: convert nanograms to carats (metric)
- Write down the value in nanograms (ng).
- 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+8.
Worked examples
Example 1 — Convert 1 ng to ct:
1 × 5e-9 = 5e-9 ct
Example 2 — Convert 100 ng to ct:
100 × 5e-9 = 5e-7 ct
Real-world example — Spanning sub-micron to micron scale
Crossing from nanograms to carats (metric) is the everyday workflow of microscopy and semiconductor engineering — a measurement of 1000 nanograms translates to a much more compact value in carats (metric) that fits the scale of biological cells and process nodes.
1000 ng × 5e-9 = 5e-6 ct
Real-world example — Sub-visible-light wavelength
500 nanograms (the green-yellow visible band) equals 0.5 carats (metric) — the canonical conversion in optics between wavelength specifications and micron-scale lens-coating thicknesses.
500 ng × 5e-9 = 2.5e-6 ct
Nanogram to Carat (metric) conversion table
Standard reference values for converting nanograms to carats (metric):
| Nanogram [ng] | Carat (metric) [ct] |
|---|---|
| 0.01 | 5e-11 |
| 0.1 | 5e-10 |
| 1 | 5e-9 |
| 2 | 1e-8 |
| 3 | 1.5e-8 |
| 4 | 2e-8 |
| 5 | 2.5e-8 |
| 10 | 5e-8 |
| 20 | 1e-7 |
| 30 | 1.5e-7 |
| 40 | 2e-7 |
| 50 | 2.5e-7 |
| 100 | 5e-7 |
| 500 | 2.5e-6 |
| 1000 | 5e-6 |
Frequently asked questions
How many carats (metric) is 1 nanogram?
How do I convert nanograms to carats (metric)?
How do I convert carats (metric) back to nanograms?
How many carats (metric) is 100 nanograms?
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Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 ng = 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.