# Chains to Light-years (ch to ly)

Source: https://www.unitconvertercalculator.com/length/chains-to-light-years/

**1 ch = 2.1263474377906E-15 ly**

One chain equals approximately 2.127 x 10-15 light-years, an incomprehensibly tiny fraction. The chain (66 feet / 20.12 m) is a land surveying unit; the light-year measures interstellar distances. These units are separated by about 15 orders of magnitude and have no practical connection.

## Formula

Convert Chains to Light-years

## Conversion Table

| Chains (ch) | Light-years (ly) |
|---|---|
| 1 ch | 2.12634E-15 ly |
| 100 ch | 2.1263474E-13 ly |
| 10000 ch | 2.126347437E-11 ly |
| 1000000 ch | 2.12634743779E-9 ly |
| 100000000 ch | 2.1263474377906E-7 ly |
| 10000000000 ch | 2.1263474377906E-5 ly |
| 1000000000000 ch | 0.0021263474377906 ly |
| 100000000000000 ch | 0.21263474377906 ly |

## Units

### Chain (ch)

Exactly 66 feet or 4 rods (20.1168 m). Invented by Edmund Gunter for land surveying. 80 chains make one mile. Still used in US public land surveys.

### Light-year (ly)

The distance light travels in one Julian year (365.25 days) in vacuum. Exactly 9,460,730,472,580,800 meters. Used for interstellar distances.

## Background

One light-year contains about 4.702 x 1014 chains, or about 470 trillion chains. The nearest star at 4.24 light-years is roughly 2 x 1015 chains away. No surveyor has ever measured star distances, and no astronomer has used chains for anything.

## Good to Know

Gunter's chain measured English farmland with 7.92-inch links. The light-year measures the void between stars. Placing them side by side is like comparing a raindrop to the Pacific Ocean.

## FAQ

### How many light-years is 1 chain?

One chain equals approximately 2.127 x 10-15 light-years. This is about 2 quadrillionths of a light-year, a number with no practical meaning.

### How many chains are in 1 light-year?

One light-year contains approximately 4.702 x 1014 chains (about 470 trillion chains).

### Is this conversion ever needed?

Never. These units exist in completely different measurement domains: land surveying and interstellar astronomy. The conversion exists only for mathematical completeness.

## Non-Frequently Asked Questions

### Could you chain the distance to a star?

The nearest star is about 4.7 x 1014 chains away. Manufacturing that many chains would require more iron than exists in our solar system. Interstellar chaining remains impractical.

## Related Articles

- [Why We Measure: The Deepest Urge in Human Civilisation](https://www.unitconvertercalculator.com/blog/why-we-measure)
- [The Map Is Not the Territory: Why Every Measurement Is Wrong](https://www.unitconvertercalculator.com/blog/the-map-is-not-the-territory)
- [Zero: The Most Dangerous Number in Measurement](https://www.unitconvertercalculator.com/blog/zero-the-most-dangerous-number-in-measurement)
- [The Body as a Ruler: Every Measurement Unit That Came From Us](https://www.unitconvertercalculator.com/blog/the-body-as-a-ruler)
- [The Speed of Everything: How We Measure From Glaciers to Light](https://www.unitconvertercalculator.com/blog/the-speed-of-everything)
- [15 Obscure Measurement Units You've Never Heard Of (But Still Need)](https://www.unitconvertercalculator.com/blog/obscure-measurement-units-guide)
- [When Measurements Go Wrong - Disasters, Blunders and Happy Accidents](https://www.unitconvertercalculator.com/blog/when-measurements-go-wrong)
- [The Surprising Stories Behind Everyday Units of Measurement](https://www.unitconvertercalculator.com/blog/stories-behind-measurement-units)
- [Metric vs. Imperial - The Complete Guide to the World's Two Measurement Systems](https://www.unitconvertercalculator.com/blog/metric-vs-imperial-complete-guide)
- [Length & Distance Conversion Guide - Meters, Feet, Miles & Kilometers](https://www.unitconvertercalculator.com/blog/length-and-distance-guide)

## See Also

- [Light-years to Chains](https://www.unitconvertercalculator.com/length/light-years-to-chains/)