Convert Femtogram to Hectogram
Convert femtograms to hectograms instantly. 1 femtogram = 1e-17 hectogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectogram 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.
Hectogram
A hectogram (hg) equals 0.1 kilogram, or 100 grams.
From the SI prefix 'hecto-' (from Greek 'hekaton', hundred).
Common in continental European food retail, especially Italy ('etto').
The hecto- prefix dates to the original metric system of 1795.
Femtogram to Hectogram conversion formula
The relationship between femtograms and hectograms:
To convert femtograms to hectograms, multiply the value in femtograms by 1e-17. To reverse, multiply hectograms by 1e+17.
How to use this converter
Type a value into the calculator. The result in hectograms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hectogram to Femtogram converter for the reverse direction.
Step-by-step: convert femtograms to hectograms
- Write down the value in femtograms (fg).
- Multiply that value by the factor 1e-17.
- The product is the equivalent value in hectograms (hg).
- To reverse, multiply the hectogram value by 1e+17.
Worked examples
Example 1 — Convert 1 fg to hg:
1 × 1e-17 = 1e-17 hg
Example 2 — Convert 100 fg to hg:
100 × 1e-17 = 1e-15 hg
Real-world example — From sub-micron to human scale
One billion femtograms equals one hectogram — the conversion that drives home the gulf between atomic-scale features and everyday objects in physics curricula.
1e+9 fg × 1e-17 = 1e-8 hg
Real-world example — Bridging nine orders of magnitude
500 million femtograms equals a value comfortably in the human-scale hectograms range. Physics problems that span this gap are common when comparing the wavelength of light to the path length of an experiment.
5e+8 fg × 1e-17 = 5e-9 hg
Femtogram to Hectogram conversion table
Standard reference values for converting femtograms to hectograms:
| Femtogram [fg] | Hectogram [hg] |
|---|---|
| 0.01 | 1e-19 |
| 0.1 | 1e-18 |
| 1 | 1e-17 |
| 2 | 2e-17 |
| 3 | 3e-17 |
| 4 | 4e-17 |
| 5 | 5e-17 |
| 10 | 1e-16 |
| 20 | 2e-16 |
| 30 | 3e-16 |
| 40 | 4e-16 |
| 50 | 5e-16 |
| 100 | 1e-15 |
| 500 | 5e-15 |
| 1000 | 1e-14 |
Frequently asked questions
How many hectograms is 1 femtogram?
How do I convert femtograms to hectograms?
How do I convert hectograms back to femtograms?
How many hectograms is 100 femtograms?
Popular weight unit conversions
Convert Femtogram to other weight units
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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 fg = 1e-17 hg) 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.