Convert Femtogram to Centigram
Convert femtograms to centigrams instantly. 1 femtogram = 1e-13 centigram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Centigram to Femtogram converter for the reverse conversion.
Units explained
Femtogram
A femtogram (fg) equals 10^-18 kilogram.
From the SI prefix 'femto-' (from Danish/Norwegian 'femten', fifteen).
Nanotechnology and high-sensitivity mass spectrometry.
The femto- prefix was adopted by the CGPM in 1975.
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.
Femtogram to Centigram conversion formula
The relationship between femtograms and centigrams:
To convert femtograms to centigrams, multiply the value in femtograms by 1e-13. To reverse, multiply centigrams by 1e+13.
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 Femtogram converter for the reverse direction.
Step-by-step: convert femtograms to centigrams
- Write down the value in femtograms (fg).
- Multiply that value by the factor 1e-13.
- The product is the equivalent value in centigrams (cg).
- To reverse, multiply the centigram value by 1e+13.
Worked examples
Example 1 — Convert 1 fg to cg:
1 × 1e-13 = 1e-13 cg
Example 2 — Convert 100 fg to cg:
100 × 1e-13 = 1e-11 cg
Real-world example — Spanning sub-micron to micron scale
Crossing from femtograms to centigrams is the everyday workflow of microscopy and semiconductor engineering — a measurement of 1000 femtograms translates to a much more compact value in centigrams that fits the scale of biological cells and process nodes.
1000 fg × 1e-13 = 1e-10 cg
Real-world example — Sub-visible-light wavelength
500 femtograms (the green-yellow visible band) equals 0.5 centigrams — the canonical conversion in optics between wavelength specifications and micron-scale lens-coating thicknesses.
500 fg × 1e-13 = 5e-11 cg
Femtogram to Centigram conversion table
Standard reference values for converting femtograms to centigrams:
| Femtogram [fg] | Centigram [cg] |
|---|---|
| 0.01 | 1e-15 |
| 0.1 | 1e-14 |
| 1 | 1e-13 |
| 2 | 2e-13 |
| 3 | 3e-13 |
| 4 | 4e-13 |
| 5 | 5e-13 |
| 10 | 1e-12 |
| 20 | 2e-12 |
| 30 | 3e-12 |
| 40 | 4e-12 |
| 50 | 5e-12 |
| 100 | 1e-11 |
| 500 | 5e-11 |
| 1000 | 1e-10 |
Frequently asked questions
How many centigrams is 1 femtogram?
How do I convert femtograms to centigrams?
How do I convert centigrams back to femtograms?
How many centigrams is 100 femtograms?
Popular weight unit conversions
Convert Femtogram to other weight units
Show all Femtogram 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 fg = 1e-13 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 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.