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Furlongs to Astronomical Units (fur to au) Converter

1 fur = 1.34473 × 10⁻⁹ au

1 Furlong equals 1.34473 × 10⁻⁹ Astronomical Units (1 fur = 1.34473 × 10⁻⁹ au). Convert Furlongs to Astronomical Units with formula, table, and examples.

One furlong equals approximately 1.345 x 10-9 astronomical units, or about 1.3 billionths of an AU. The furlong (220 yards / 201.168 m) is an agricultural and horse racing unit; the AU measures the Earth-Sun distance. About 743 million furlongs fit into one AU.

How to Convert Furlongs to Astronomical Units

au = fur × 1.34473 × 10⁻⁹
Multiply the value in Furlongs by 1.34473 × 10⁻⁹
  1. Take your value in Furlongs
  2. Multiply by 1.34473 × 10⁻⁹
  3. Read the result in Astronomical Units

Common Furlongs to Astronomical Units Conversions

Furlongs (fur) Astronomical Units (au) Status
1 fur 1.34473 × 10⁻⁹ au
10 fur 1.34473 × 10⁻⁸ au
100 fur 1.34473 × 10⁻⁷ au
1,000 fur 0.000001 au
10,000 fur 0.00001 au
100,000 fur 0.0001 au
1,000,000 fur 0.0013 au
10,000,000 fur 0.0134 au

Good to Know About Furlongs to Astronomical Units Conversion

The furlong was designed for an ox. The AU was designed for planets. The gap between their scales reflects the gap between pre-industrial agriculture and modern astrophysics.

Furlongs to Astronomical Units: What You Need to Know

The Earth-Sun distance (1 AU) is about 743 million furlongs. A Kentucky Derby (10 furlongs) covers 1.345 x 10-8 AU. The entire length of Britain (about 4,800 furlongs) is only 0.00000646 AU. These numbers show how small even large earthly distances are on the astronomical scale.

What is a Furlong? fur

Exactly 660 feet or one-eighth of a mile (201.168 m). Originally the length of a plowed furrow. Still used in horse racing.

Imperial horse racing historical
Learn more about Furlong →

What is a Astronomical Unit? au

Exactly 149,597,870,700 meters by IAU 2012 definition. Roughly the average distance from the Earth to the Sun. Used for distances within our solar system.

Astronomical solar system distances astronomy planetary science
Learn more about Astronomical Unit →

Going the other way? Use our Astronomical Units to Furlongs converter.

Furlongs to Astronomical Units FAQ

  • One furlong equals approximately 1.345 x 10-9 AU (about 1.3 billionths of an AU).

  • One AU contains approximately 7.432 x 108 furlongs (about 743 million).

  • No. Furlongs measure horse races and historical farmland. AU measures planetary orbits. These are about 9 orders of magnitude apart.

Non-Frequently Asked Questions About Furlongs to Astronomical Units

Questions nobody should ask - but someone did.

  • The Sun is 1 AU = about 7.432 x 108 furlongs away. A 6-furlong race means about 1.24 x 108 races (124 million) to cover the distance. At one race every 72 seconds, running continuously, it would take about 283 years of non-stop racing.

  • The Kentucky Derby is 10 furlongs = about 1.346 x 10-8 AU (about 13 billionths of an AU). The entire Derby is less than one hundred-millionth of the distance to the Sun. From a cosmic perspective, horse racing is immeasurably local.

  • One AU is about 743,200,000 furlongs. At a derby pace of about 17 seconds per furlong, racing 1 AU would take about 400 years of continuous galloping. Space horse racing needs significantly faster horses. Or wormholes.

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Need the reverse? Use our Astronomical Units to Furlongs converter. See all Length & Distance converters.