Convert length and distance units — meters, feet, inches, kilometers, miles, light years and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 au | 743657 fur | |
| 0.01 au | 7.43657e+06 fur | |
| 0.1 au | 7.43657e+07 fur | |
| 1 au | 7.43657e+08 fur | |
| 5 au | 3.71829e+09 fur | |
| 10 au | 7.43657e+09 fur | |
| 50 au | 3.71829e+10 fur | |
| 100 au | 7.43657e+10 fur | |
| 1000 au | 7.43657e+11 fur |
Multiply the number of Astronomical Units by 743657000 to get Furlongs. Formula: fur = au × 743657000. Example: 10 au × 743657000 = 7436570000 fur. To reverse, divide Furlongs by 743657000 to get Astronomical Units.
| Astronomical Unit (au) | Furlong (fur) |
|---|---|
| 0.001 au | 743657 fur |
| 0.01 au | 7436570 fur |
| 0.1 au | 74365700 fur |
| 0.5 au | 371829000 fur |
| 1 au | 743657000 fur |
| 2 au | 1487310000 fur |
| 5 au | 3718290000 fur |
| 10 au | 7436570000 fur |
| 20 au | 14873100000 fur |
| 50 au | 37182900000 fur |
| 100 au | 74365700000 fur |
| 250 au | 185914000000 fur |
| 500 au | 371829000000 fur |
| 1000 au | 743657000000 fur |
| 10000 au | 7.4366×1012 fur |
To convert Astronomical Unit to Furlong, multiply by 743657000. Example: 10 au = 7436570000 fur
To convert Furlong back to Astronomical Unit, divide by 743657000 (multiply by 1.3447×10-9). Use the swap button above.
Start with 100 Astronomical Units = 74365700000 fur as your reference point. Scale up or down from there.
Astronomy educators use AU-to-furlong as one of the most dramatic scale comparisons available — 1 AU = 743.6 million furlongs. This helps students viscerally appreciate how measurement systems span from agricultural fields to interplanetary space.
The furlong-per-fortnight is a beloved unit of measurement in physics humour circles. AU-to-furlong conversions appear in popular science writing to demonstrate the absurdity of applying archaic agricultural units to astronomical distances.
Scholars studying the history of measurement compare the furlong — one of the oldest English units, based on the length of a ploughed furrow — with the AU, established during the scientific revolution, to trace the evolution of human measurement.
Comprehensive conversion tools include all standardised historical units alongside modern scientific ones, ensuring researchers can convert between any combination of units encountered in historical or cross-disciplinary scientific literature.
University physics courses use unusual unit combinations like AU-to-furlongs in problem sets to test students' dimensional analysis skills and ability to chain multiple conversion factors correctly.
Writers explaining astronomical distances to general audiences occasionally use furlongs as a deliberately absurd counterpoint to make the vast scale of the solar system feel more viscerally strange and impressive.
The Astronomical Unit is a unit of Length measurement (symbol: au). 1 au = 743657000 fur. Used in scientific and practical Length measurement applications.
The Furlong is a unit of Length measurement (symbol: fur). It is part of an internationally recognised measurement system used alongside the Astronomical Unit.
The astronomical unit has ancient roots — Aristarchus of Samos attempted to measure the Earth-Sun distance around 270 BC, estimating it at 18–20 lunar distances (the true value is about 390). For centuries the AU was estimated using Venus transit observations and trigonometry. Edmond Halley organised the first coordinated international transit-of-Venus expedition in 1716 to measure it precisely. The modern value was determined by radar ranging to Venus in 1961. The IAU formally defined the AU as exactly 149,597,870,700 metres in 2012 — a fixed constant of physics, not a measured distance.
The furlong — from Old English 'furlang', meaning furrow-long — was the standard length of one furrow ploughed by an ox team without resting, typically 220 yards. It dates to at least 8th-century England and was used to lay out the open-field system of medieval agriculture. The furlong's relationship to other units was carefully defined: 10 chains = 1 furlong, 8 furlongs = 1 mile. Today it survives almost exclusively in horse racing, where it remains the official distance unit in the UK, Ireland, Australia, and several other countries.
Common use: Astronomical Unit to Furlong conversion is needed when working with international standards, scientific publications, or reference materials that use different unit systems for Length measurement.