Convert length and distance units — meters, feet, inches, kilometers, miles, light years and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mi | 1.076e-11 au | |
| 0.01 mi | 1.076e-10 au | |
| 0.1 mi | 1.07576e-09 au | |
| 1 mi | 1.07576e-08 au | |
| 5 mi | 5.37882e-08 au | |
| 10 mi | 1.07576e-07 au | |
| 50 mi | 5.37882e-07 au | |
| 100 mi | 1.07576e-06 au | |
| 1000 mi | 1.07576e-05 au |
Multiply the number of Miles by 1.0758×10-8 to get Astronomical Units. Formula: au = mi × 1.0758×10-8. Example: 10 mi × 1.0758×10-8 = 1.07576e-07 au. To reverse, divide Astronomical Units by 1.0758×10-8 to get Miles.
| Mile (mi) | Astronomical Unit (au) |
|---|---|
| 0.001 mi | 1.0758×10-11 au |
| 0.01 mi | 1.0758×10-10 au |
| 0.1 mi | 1.0758×10-9 au |
| 0.5 mi | 5.3788×10-9 au |
| 1 mi | 1.0758×10-8 au |
| 2 mi | 2.1515×10-8 au |
| 5 mi | 5.3788×10-8 au |
| 10 mi | 1.07576e-07 au |
| 20 mi | 2.15153e-07 au |
| 50 mi | 5.37882e-07 au |
| 100 mi | 1.07576e-06 au |
| 250 mi | 2.68941e-06 au |
| 500 mi | 5.37882e-06 au |
| 1000 mi | 1.07576e-05 au |
| 10000 mi | 0.000107576 au |
To convert Mile to Astronomical Unit, multiply by 1.0758×10-8. Example: 10 mi = 1.07576e-07 au
To convert Astronomical Unit back to Mile, divide by 1.0758×10-8 (multiply by 92957100). Use the swap button above.
Start with 100 Miles = 1.07576e-06 au as your reference point. Scale up or down from there.
NASA expresses planetary distances in AU for scientific precision but converts to miles for American general audiences — Mars at 0.52–2.52 AU becomes "48–235 million miles" for US news coverage.
Near-Earth asteroid distances are reported in both AU (for scientists) and miles (for US public) in NASA press releases — every close-approach announcement requires mi-to-AU conversion for dual-audience communication.
American amateur astronomers familiar with miles convert AU-based ephemeris data to miles for intuitive understanding of planetary distances — "Jupiter is 5.2 AU, that's 483 million miles from the Sun."
US mission planners express spacecraft distances in AU for orbital mechanics but convert to miles for Congressional budget briefings and public affairs materials aimed at American taxpayers.
US educators building solar system scale models convert AU to miles for familiar context: "If the Earth-Sun distance is 93 million miles, then at 1 mile = 1 million miles scale, the Earth is 93 miles from the model Sun."
American science journalists routinely convert between miles and AU in the same article — expressing both the familiar mi-scale distance and the scientific AU-scale orbital parameter for different reader segments.
The Mile is a unit of Length measurement (symbol: mi). 1 mi = 1.0758×10-8 au. Used in scientific and practical Length measurement applications.
The Astronomical Unit is a unit of Length measurement (symbol: au). It is part of an internationally recognised measurement system used alongside the Mile.
The mile traces back to the Roman 'mille passuum' — a thousand paces of a marching legionary, standardised at 5,000 Roman feet. When the Romans left Britain, the English statute mile evolved independently. Parliament fixed it at 5,280 feet (8 furlongs) 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. Today only three countries — the US, Liberia, and Myanmar — still officially use miles for road distances.
The astronomical unit has ancient roots — Aristarchus of Samos attempted to measure the Earth-Sun distance around 270 BC. For centuries the AU was estimated using Venus transit observations. Edmond Halley organised the first coordinated international transit-of-Venus expedition in 1716. 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.
Common use: Mile to Astronomical Unit conversion is needed when working with international standards, scientific publications, or reference materials that use different unit systems for Length measurement.