Convert Gerah (Biblical Hebrew) to Femtogram
Convert gerahs (biblical hebrew) to femtograms instantly. 1 gerah (biblical hebrew) = 5.7e+14 femtogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Femtogram to Gerah (Biblical Hebrew) converter for the reverse conversion.
Units explained
Gerah (Biblical Hebrew)
The gerah was the smallest Hebrew weight, about 0.57 gram (one-twentieth of a shekel).
From a Hebrew word for a small grain or bean.
Ancient Israelite metrology.
Part of the smallest divisions of the biblical shekel.
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.
Gerah (Biblical Hebrew) 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 gerahs (biblical hebrew) and femtograms:
To convert gerahs (biblical hebrew) to femtograms, multiply the value in gerahs (biblical hebrew) by 5.7e+14. To reverse, multiply femtograms by 1.754386e-15.
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 Gerah (Biblical Hebrew) converter for the reverse direction.
Step-by-step: convert gerahs (biblical hebrew) to femtograms
- Write down the value in gerahs (biblical hebrew) (gerah).
- Multiply that value by the factor 5.7e+14.
- The product is the equivalent value in femtograms (fg).
- To reverse, multiply the femtogram value by 1.754386e-15.
Worked examples
Example 1 — Convert 1 gerah to fg:
1 × 5.7e+14 = 5.7e+14 fg
Example 2 — Convert 100 gerah to fg:
100 × 5.7e+14 = 5.7e+16 fg
Real-world example — Mid-micron to nanometer
3 gerahs (biblical hebrew) equals 3,000 femtograms — useful when relating mid-infrared wavelengths (typically quoted in microns) to nanometer-scale visible-light wavelength tables.
3 gerah × 5.7e+14 = 1.71e+15 fg
Real-world example — From microns to sub-micron features
One gerah (biblical hebrew) equals one thousand femtograms — the conversion semiconductor designers do constantly when comparing mask feature dimensions to actual transistor gate lengths.
1 gerah × 5.7e+14 = 5.7e+14 fg
Real-world example — Infrared to visible-spectrum mapping
A 10-gerah (biblical hebrew) thermal infrared wavelength corresponds to a much larger number in femtograms, the unit favoured for ultraviolet and visible-light specifications.
10 gerah × 5.7e+14 = 5.7e+15 fg
Gerah (Biblical Hebrew) to Femtogram conversion table
Standard reference values for converting gerahs (biblical hebrew) to femtograms:
| Gerah (Biblical Hebrew) [gerah] | Femtogram [fg] |
|---|---|
| 0.01 | 5.7e+12 |
| 0.1 | 5.7e+13 |
| 1 | 5.7e+14 |
| 2 | 1.14e+15 |
| 3 | 1.71e+15 |
| 4 | 2.28e+15 |
| 5 | 2.85e+15 |
| 10 | 5.7e+15 |
| 20 | 1.14e+16 |
| 30 | 1.71e+16 |
| 40 | 2.28e+16 |
| 50 | 2.85e+16 |
| 100 | 5.7e+16 |
| 500 | 2.85e+17 |
| 1000 | 5.7e+17 |
Frequently asked questions
How many femtograms is 1 gerah (biblical hebrew)?
How do I convert gerahs (biblical hebrew) to femtograms?
How do I convert femtograms back to gerahs (biblical hebrew)?
How many femtograms is 100 gerahs (biblical hebrew)?
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Metric / SI (18 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (13 units)
Sources & references
Conversion factor (1 gerah = 5.7e+14 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.