Furlong Converter
Convert furlong between units instantly. Includes conversion tables, common equivalents, and calculation formulas. Free to use with no signup required.
Formula
1 Furlong = 201.168 meters = 220 yards = 660 feet = 1/8 mile
The furlong is defined as exactly 201.168 meters through the international yard agreement. All conversions pass through meters as the base unit. One furlong equals 10 chains, 40 rods, or 1/8 of a statute mile.
Worked Examples
Example 1: Kentucky Derby Distance Conversion
Problem: The Kentucky Derby is run over 10 furlongs. Convert this to meters, kilometers, miles, and yards.
Solution: 10 furlongs x 201.168 m/furlong = 2,011.68 meters\n2,011.68 / 1,000 = 2.01168 kilometers\n10 furlongs / 8 furlongs per mile = 1.25 miles\n10 furlongs x 220 yards/furlong = 2,200 yards\n10 furlongs x 660 feet/furlong = 6,600 feet
Result: 10 furlongs = 2,011.68 m = 2.012 km = 1.25 miles = 2,200 yards
Example 2: Marathon to Furlongs
Problem: A marathon is 42,195 meters. How many furlongs is that?
Solution: 42,195 meters / 201.168 meters per furlong = 209.714 furlongs\nOr: 42,195 / 1609.344 = 26.2188 miles\n26.2188 x 8 = 209.75 furlongs\nClosest whole furlongs = 210 furlongs\n210 furlongs = 42,245.28 meters (50 meters more than a marathon)
Result: Marathon = 209.71 furlongs = approximately 210 furlongs
Frequently Asked Questions
What is a furlong and where did the measurement originate?
A furlong is a unit of length equal to one-eighth of a mile, 220 yards, 660 feet, or exactly 201.168 meters. The word comes from the Old English words 'furh' meaning furrow and 'lang' meaning long. It originally represented the length of a furrow that a team of oxen could plow in a medieval open field before needing to turn. This standardized plot was approximately 40 rods or 10 chains long. The furlong became an official English unit of measurement and was incorporated into the statute mile in 1593 when Queen Elizabeth I defined the mile as 8 furlongs. Today the furlong survives primarily in horse racing where track distances are still commonly expressed in furlongs throughout the United Kingdom, United States, and other countries with thoroughbred racing traditions.
How does a furlong relate to other imperial and historical measurements?
The furlong sits within a coherent system of related imperial measurements based on land surveying. One furlong equals 10 chains, where each chain is 66 feet as defined by Edmund Gunter in 1620. One furlong also equals 40 rods or poles, where each rod is 16.5 feet. Eight furlongs make one statute mile of 5,280 feet. A square furlong, which is one furlong by one furlong, equals 10 acres, creating a direct link between linear and area measurements. This relationship was fundamental to medieval English land management where a strip of farmland was typically 1 furlong long by 1 chain wide, equaling exactly 1 acre. The chain became the basis of the American Public Land Survey System that divided much of the United States into sections and townships.
What other unusual or archaic length units are related to the furlong?
The furlong connects to a fascinating family of historical length units. The chain at 66 feet was the standard surveying unit used with Gunter's chain, a physical chain of 100 links. The rod, pole, or perch at 16.5 feet was the standard unit for measuring agricultural land and is still used in some US property descriptions. The ell was approximately 45 inches and used in textile measurement. The league, roughly 3 miles or 24 furlongs, was the distance a person could walk in one hour. The fathom at 6 feet measured water depth. The hand at 4 inches still measures horse height. The cable at 100 fathoms or 600 feet measured nautical distances. Many of these units persisted because they related to practical human-scale activities like plowing, walking, or measuring cloth, making them more intuitive than abstract metric units in their original contexts.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
Can I share or bookmark my calculation?
You can bookmark the calculator page in your browser. Many calculators also display a shareable result summary you can copy. The page URL stays the same so returning to it will bring you back to the same tool.
Can I use the results for professional or academic purposes?
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.