Convert Femtogram to Troy Ounce
Convert femtograms to troy ounces instantly. 1 femtogram = 3.215075e-17 troy ounce — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Troy Ounce 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.
Troy Ounce
The troy ounce (ozt) equals about 31.103 grams, one-twelfth of a troy pound.
From the Troy system of weights associated with Troyes, France.
The global standard for pricing gold, silver, platinum, and palladium.
Established in the medieval Troy system and retained for precious metals.
Femtogram to Troy Ounce conversion formula
The relationship between femtograms and troy ounces:
To convert femtograms to troy ounces, multiply the value in femtograms by 3.215075e-17. To reverse, multiply troy ounces by 3.110348e+16.
How to use this converter
Type a value into the calculator. The result in troy ounces updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Troy Ounce to Femtogram converter for the reverse direction.
Step-by-step: convert femtograms to troy ounces
- Write down the value in femtograms (fg).
- Multiply that value by the factor 3.215075e-17.
- The product is the equivalent value in troy ounces (oz t).
- To reverse, multiply the troy ounce value by 3.110348e+16.
Worked examples
Example 1 — Convert 1 fg to oz t:
1 × 3.215075e-17 = 3.215075e-17 oz t
Example 2 — Convert 100 fg to oz t:
100 × 3.215075e-17 = 3.215075e-15 oz t
Real-world example — Sub-micron to millimeter
500,000 femtograms converts to a small everyday quantity in troy ounces — useful when relating optical-wavelength specifications to physical mounting hardware.
500000 fg × 3.215075e-17 = 1.607537e-11 oz t
Real-world example — From wavelengths to millimeter-scale objects
A value of one million femtograms sounds vast at the atomic scale but converts to a small everyday quantity in troy ounces — useful when relating optical-wavelength specifications to physical mounting hardware.
1000000 fg × 3.215075e-17 = 3.215075e-11 oz t
Femtogram to Troy Ounce conversion table
Standard reference values for converting femtograms to troy ounces:
| Femtogram [fg] | Troy Ounce [oz t] |
|---|---|
| 0.01 | 3.215075e-19 |
| 0.1 | 3.215075e-18 |
| 1 | 3.215075e-17 |
| 2 | 6.430149e-17 |
| 3 | 9.645224e-17 |
| 4 | 1.28603e-16 |
| 5 | 1.607537e-16 |
| 10 | 3.215075e-16 |
| 20 | 6.430149e-16 |
| 30 | 9.645224e-16 |
| 40 | 1.28603e-15 |
| 50 | 1.607537e-15 |
| 100 | 3.215075e-15 |
| 500 | 1.607537e-14 |
| 1000 | 3.215075e-14 |
Frequently asked questions
How many troy ounces is 1 femtogram?
How do I convert femtograms to troy ounces?
How do I convert troy ounces back to femtograms?
How many troy ounces 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 = 3.215075e-17 oz t) 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.