Convert Wey to Femtogram
Convert weys to femtograms instantly. 1 wey = 1.143053e+20 femtogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Femtogram to Wey converter for the reverse conversion.
Units explained
Wey
The wey was an English bulk weight, here taken as 252 pounds (about 114.3 kg).
From Old English 'waege', a weighing or balance.
Obsolete English unit for wool, cheese, and salt.
Used in medieval and early-modern English trade.
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.
Wey to Femtogram 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 weys and femtograms:
To convert weys to femtograms, multiply the value in weys by 1.143053e+20. To reverse, multiply femtograms by 8.748502e-21.
How to use this converter
Type a value into the calculator. The result in femtograms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Femtogram to Wey converter for the reverse direction.
Step-by-step: convert weys to femtograms
- Write down the value in weys (wey).
- Multiply that value by the factor 1.143053e+20.
- The product is the equivalent value in femtograms (fg).
- To reverse, multiply the femtogram value by 8.748502e-21.
Worked examples
Example 1 — Convert 1 wey to fg:
1 × 1.143053e+20 = 1.143053e+20 fg
Example 2 — Convert 100 wey to fg:
100 × 1.143053e+20 = 1.143053e+22 fg
Wey to Femtogram conversion table
Standard reference values for converting weys to femtograms:
| Wey [wey] | Femtogram [fg] |
|---|---|
| 0.01 | 1.143053e+18 |
| 0.1 | 1.143053e+19 |
| 1 | 1.143053e+20 |
| 2 | 2.286106e+20 |
| 3 | 3.429158e+20 |
| 4 | 4.572211e+20 |
| 5 | 5.715264e+20 |
| 10 | 1.143053e+21 |
| 20 | 2.286106e+21 |
| 30 | 3.429158e+21 |
| 40 | 4.572211e+21 |
| 50 | 5.715264e+21 |
| 100 | 1.143053e+22 |
| 500 | 5.715264e+22 |
| 1000 | 1.143053e+23 |
Frequently asked questions
How many femtograms is 1 wey?
How do I convert weys to femtograms?
How do I convert femtograms back to weys?
How many femtograms is 100 weys?
Popular weight unit conversions
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Metric / SI (18 units)
Avoirdupois (14 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 wey = 1.143053e+20 fg) 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.