Convert length and distance units — meters, feet, inches, kilometers, miles, light years and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 chain | 2.126e-18 ly | |
| 0.01 chain | 2.126e-17 ly | |
| 0.1 chain | 2.126e-16 ly | |
| 1 chain | 2.126e-15 ly | |
| 5 chain | 1.063e-14 ly | |
| 10 chain | 2.126e-14 ly | |
| 50 chain | 1.063e-13 ly | |
| 100 chain | 2.126e-13 ly | |
| 1000 chain | 2.126e-12 ly |
Multiply the number of Chains by 2.1263×10-15 to get Light Years. Formula: ly = chain × 2.1263×10-15. Example: 10 chain × 2.1263×10-15 = 2.1263×10-14 ly. To reverse, divide Light Years by 2.1263×10-15 to get Chains.
| Chain (chain) | Light Year (ly) |
|---|---|
| 0.001 chain | 2.1263×10-18 ly |
| 0.01 chain | 2.1263×10-17 ly |
| 0.1 chain | 2.1263×10-16 ly |
| 0.5 chain | 1.0631×10-15 ly |
| 1 chain | 2.1263×10-15 ly |
| 2 chain | 4.2526×10-15 ly |
| 5 chain | 1.0631×10-14 ly |
| 10 chain | 2.1263×10-14 ly |
| 20 chain | 4.2526×10-14 ly |
| 50 chain | 1.0631×10-13 ly |
| 100 chain | 2.1263×10-13 ly |
| 250 chain | 5.3157×10-13 ly |
| 500 chain | 1.0631×10-12 ly |
| 1000 chain | 2.1263×10-12 ly |
| 10000 chain | 2.1263×10-11 ly |
To convert Chain to Light Year, multiply by 2.1263×10-15. Example: 10 chain = 2.1263×10-14 ly
To convert Light Year back to Chain, divide by 2.1263×10-15 (multiply by 4.703×1014). Use the swap button above.
Start with 100 Chains = 2.1263×10-13 ly as your reference point. Scale up or down from there.
1 chain = 2.126×10⁻¹⁵ light-years. Physics educators use chain-to-light-year conversion to help students visualise the extraordinary scale difference between a land surveyor's working unit and an astronomer's working unit.
Science communicators use chain-to-light-year comparisons to make astronomical distances tangible: expressing the nearest star's distance in surveying chains produces a number with 15 zeros — a vivid illustration of cosmic scale.
Historians of science compare the chain — invented for English agricultural land division in 1620 — with the light-year — introduced for stellar distances in the 19th century — to show how measurement evolved with human exploration.
University physics courses include chain-to-light-year conversion in dimensional analysis exercises, requiring students to chain multiple conversion factors and work confidently with numbers spanning 15 orders of magnitude.
Scientific databases cataloguing all standardised human measurement units include chain-to-light-year for completeness, ensuring researchers can convert between any pair of units encountered in cross-disciplinary literature.
Planetarium and science museum exhibits occasionally use chain-to-light-year comparisons alongside other extreme scale illustrations to engage visitors in thinking about the full range of human measurement systems.
The Chain is a unit of Length measurement (symbol: chain). 1 chain = 2.1263×10-15 ly. Used in scientific and practical Length measurement applications.
The Light Year is a unit of Length measurement (symbol: ly). It is part of an internationally recognised measurement system used alongside the Chain.
Edmund Gunter invented the surveyor's chain in 1620. His design — 100 links totalling exactly 66 feet — was brilliantly chosen: 10 chains × 10 chains = 1 acre, making area calculation trivially simple in the field. 80 chains = 1 mile, 10 chains = 1 furlong. The chain became standard across the British Empire and is written into American law — the US Public Land Survey System still divides land using chains and links.
The light-year was not coined by professional astronomers — it first appeared in a German publication in 1851 written by Otto Ule as a way to make stellar distances comprehensible to general audiences. It equals the distance light travels in one Julian year: exactly 9,460,730,472,580.8 kilometres. Professional astronomers often prefer parsecs, but the light-year became the public's unit of choice for cosmic distance because it connects speed with scale. One light-year equals about 63,241 astronomical units.
Common use: Chain to Light Year conversion is needed when working with international standards, scientific publications, or reference materials that use different unit systems for Length measurement.