Convert Femtogram to Masha
Convert femtograms to mashas instantly. 1 femtogram = 1.028824e-15 masha — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Masha 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.
Masha
The masha equals about 0.972 gram, or eight ratti.
A traditional Indian mass unit in the ratti-masha-tola chain.
Small jewelry and gemstone weights in South Asia.
Part of the ancient Indian weight system dating to the Indus Valley era.
Femtogram to Masha conversion formula
Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.
The relationship between femtograms and mashas:
To convert femtograms to mashas, multiply the value in femtograms by 1.028824e-15. To reverse, multiply mashas by 9.719837e+14.
How to use this converter
Type a value into the calculator. The result in mashas updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Masha to Femtogram converter for the reverse direction.
Step-by-step: convert femtograms to mashas
- Write down the value in femtograms (fg).
- Multiply that value by the factor 1.028824e-15.
- The product is the equivalent value in mashas (masha).
- To reverse, multiply the masha value by 9.719837e+14.
Worked examples
Example 1 — Convert 1 fg to masha:
1 × 1.028824e-15 = 1.028824e-15 masha
Example 2 — Convert 100 fg to masha:
100 × 1.028824e-15 = 1.028824e-13 masha
Real-world example — Sub-visible-light wavelength
500 femtograms (the green-yellow visible band) equals 0.5 mashas — the canonical conversion in optics between wavelength specifications and micron-scale lens-coating thicknesses.
500 fg × 1.028824e-15 = 5.144119e-13 masha
Real-world example — Spanning sub-micron to micron scale
Crossing from femtograms to mashas is the everyday workflow of microscopy and semiconductor engineering — a measurement of 1000 femtograms translates to a much more compact value in mashas that fits the scale of biological cells and process nodes.
1000 fg × 1.028824e-15 = 1.028824e-12 masha
Femtogram to Masha conversion table
Standard reference values for converting femtograms to mashas:
| Femtogram [fg] | Masha [masha] |
|---|---|
| 0.01 | 1.028824e-17 |
| 0.1 | 1.028824e-16 |
| 1 | 1.028824e-15 |
| 2 | 2.057648e-15 |
| 3 | 3.086472e-15 |
| 4 | 4.115295e-15 |
| 5 | 5.144119e-15 |
| 10 | 1.028824e-14 |
| 20 | 2.057648e-14 |
| 30 | 3.086472e-14 |
| 40 | 4.115295e-14 |
| 50 | 5.144119e-14 |
| 100 | 1.028824e-13 |
| 500 | 5.144119e-13 |
| 1000 | 1.028824e-12 |
Frequently asked questions
How many mashas is 1 femtogram?
How do I convert femtograms to mashas?
How do I convert mashas back to femtograms?
How many mashas 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 = 1.028824e-15 masha) 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.