Convert length and distance units — meters, feet, inches, kilometers, miles, light years and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 chain | 1.25e-05 mi | |
| 0.01 chain | 0.000125 mi | |
| 0.1 chain | 0.00125 mi | |
| 1 chain | 0.0125 mi | |
| 5 chain | 0.0625 mi | |
| 10 chain | 0.125 mi | |
| 50 chain | 0.625 mi | |
| 100 chain | 1.25 mi | |
| 1000 chain | 12.5 mi |
Multiply the number of Chains by 0.0125 to get Miles. Formula: mi = chain × 0.0125. Example: 10 chain × 0.0125 = 0.125 mi. To reverse, divide Miles by 0.0125 to get Chains.
| Chain (chain) | Mile (mi) |
|---|---|
| 0.001 chain | 1.25e-05 mi |
| 0.01 chain | 0.000125 mi |
| 0.1 chain | 0.00125 mi |
| 0.5 chain | 0.00625 mi |
| 1 chain | 0.0125 mi |
| 2 chain | 0.025 mi |
| 5 chain | 0.0625 mi |
| 10 chain | 0.125 mi |
| 20 chain | 0.25 mi |
| 50 chain | 0.625 mi |
| 100 chain | 1.25 mi |
| 250 chain | 3.125 mi |
| 500 chain | 6.25 mi |
| 1000 chain | 12.5 mi |
| 10000 chain | 125 mi |
To convert Chain to Mile, multiply by 0.0125. Example: 10 chain = 0.125 mi
To convert Mile back to Chain, divide by 0.0125 (multiply by 80). Use the swap button above.
Start with 100 Chains = 1.25 mi as your reference point. Scale up or down from there.
The US township-and-range land survey system defines sections as 1 square mile = 80 chains × 80 chains. Surveyors and land managers convert between chains and miles constantly when working with public land records.
British road and rail distances are officially measured in miles and chains (e.g. "3 miles 42 chains"). Engineers and planners convert this compound unit to decimal miles for digital mapping and routing systems.
Researchers studying historic English turnpike roads and coaching routes encounter distances recorded in miles and chains in toll road records. Converting to decimal miles is needed for mapping in modern GIS software.
Farm and estate valuers in the US and UK encounter land areas and boundary distances in chains when assessing rural properties, converting to miles for calculating road frontage and distance to market in valuation reports.
Orienteering courses in Commonwealth countries are sometimes set on maps with chain-based grid systems from historic OS maps. Competitors and course planners convert to miles for distance estimation and course design.
Historic canal surveys used miles and chains for distance measurement along routes. Waterway restoration engineers convert chain-based survey data to miles when planning dredging, lock restoration, and towpath improvements.
The Chain is a unit of Length measurement (symbol: chain). 1 chain = 0.0125 mi. Used in scientific and practical Length measurement applications.
The Mile is a unit of Length measurement (symbol: mi). 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 mile traces back to the Roman 'mille passuum' — a thousand paces — standardised at 5,000 Roman feet. When the Romans left Britain, the English statute mile evolved independently, fixed at 5,280 feet (8 furlongs) by Parliament in 1593 — deliberately chosen to align with the furlong system used in land measurement. The US adopted the statute mile from the British and never metricated road distances. Only three countries — the US, Liberia, and Myanmar — still officially use miles for road distances.
Common use: Chain to Mile conversion is needed when working with international standards, scientific publications, or reference materials that use different unit systems for Length measurement.