Chain to Fermi Converter
Convert Chain (ch) to Fermi (fm) instantly. 1 ch = 2.011680e+16 fm.
Length Converter
31 units available
1 ch = 2.011680e+16 fm
Formula:
fm = ch × 2.011680e+16With your value: 1 ch = 2.011680e+16 fm
How big is that?
Everyday references on a logarithmic scale, all expressed in chain so you can sanity-check the result.
Other Chain to Fermi conversions
Chain to Fermi Conversion Table
| Chain (ch) | Fermi (fm) |
|---|---|
| 0.5 | 1.005840e+16 |
| 1 | 2.011680e+16 |
| 2 | 4.023360e+16 |
| 5 | 1.005840e+17 |
| 10 | 2.011680e+17 |
| 15 | 3.017520e+17 |
| 20 | 4.023360e+17 |
| 25 | 5.029200e+17 |
| 50 | 1.005840e+18 |
| 100 | 2.011680e+18 |
| 250 | 5.029200e+18 |
| 500 | 1.005840e+19 |
| 1000 | 2.011680e+19 |
Fermi to Chain Conversion Table
| Fermi (fm) | Chain (ch) |
|---|---|
| 0.5 | 2.485485e-17 |
| 1 | 4.970970e-17 |
| 2 | 9.941939e-17 |
| 5 | 2.485485e-16 |
| 10 | 4.970970e-16 |
| 15 | 7.456454e-16 |
| 20 | 9.941939e-16 |
| 25 | 1.242742e-15 |
| 50 | 2.485485e-15 |
| 100 | 4.970970e-15 |
| 250 | 1.242742e-14 |
| 500 | 2.485485e-14 |
| 1000 | 4.970970e-14 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Chain (ch)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Fermi (fm)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Chain to Fermi
To convert from Chain (ch) to Fermi (fm), multiply the value by 2.011680e+16.
Formula: fm = ch × 2.011680e+16
Reverse: ch = fm × 4.970970e-17
Step-by-Step Example
- Start with your value in Chain. For example: 5 ch
- Multiply by the conversion factor: 5 x 2.011680e+16
- The result is: 1.005840e+17 fm
About Chain
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
Common uses: land surveying, cadastral records, cricket pitch length.
About Fermi
The fermi (fm) is a unit of distance and length. One fermi equals 1.000000 × 10^-15 metres. UnitConvertLab converts it against every other length unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: length calculations, engineering and science, education.
Frequently Asked Questions
How many Fermi are in 1 Chain?
There are exactly 2.011680e+16 Fermi in 1 Chain. This means the conversion factor from Chain to Fermi is 2.011680e+16.
What is the formula to convert Chain to Fermi?
The formula to convert Chain to Fermi is: fm = ch × 2.011680e+16. For example, to convert 10 Chain to Fermi, you would multiply 10 by 2.011680e+16.
What is a Chain?
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
What is a Fermi?
The fermi (fm) is a unit of distance and length. One fermi equals 1.000000 × 10^-15 metres. UnitConvertLab converts it against every other length unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What are the common uses of Chain?
The Chain is commonly used in land surveying, cadastral records, cricket pitch length.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Chain to Fermi converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/chain-to-fermi