ch to Earth's polar radius
92 unitsConvert Chain (US survey) to Earth's polar radius (ch to Earth's polar radius)
1 chain (US survey) = 0.000003164628905 Earth's polar radius. Convert chain (US survey) to Earth's polar radius instantly, with the exact factor, the formula and a reference table of common values.
ch to Earth's polar radius conversion table
| ch | Earth's polar radius |
|---|---|
| 1 ch | 0.000003164628905 Earth's polar radius |
| 2 ch | 0.000006329257809 Earth's polar radius |
| 3 ch | 0.000009493886714 Earth's polar radius |
| 5 ch | 0.00001582314452 Earth's polar radius |
| 10 ch | 0.00003164628905 Earth's polar radius |
| 20 ch | 0.00006329257809 Earth's polar radius |
| 50 ch | 0.0001582314452 Earth's polar radius |
| 100 ch | 0.0003164628905 Earth's polar radius |
| 250 ch | 0.0007911572261 Earth's polar radius |
| 500 ch | 0.001582314452 Earth's polar radius |
| 1000 ch | 0.003164628905 Earth's polar radius |
What is a chain (US survey)?
The chain (US survey) is a US survey unit. One chain (US survey) equals 20.11684023 meters, so every conversion on this page starts from that single number. Survey units come from a slightly older definition of the foot that the United States kept for land measurement, so they are a tiny fraction larger than the modern versions.
The difference is far too small to notice in a room, but across miles of property boundary it matters, which is why surveyors and deed records keep the two apart.
In writing, the chain (US survey) is usually shortened to "ch". One chain (US survey) is 20.11684023 meters, and that ratio is what every figure on this page is built from.