---
title: "Miles to Astronomical units — mi to AU converter"
description: "1 mile = 1.076 × 10^-8 astronomical units. Convert miles to astronomical units with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/miles-to-astronomical-units/
site: "At One Place"
---

# Miles to astronomical units

**1 mile in astronomical units: 1 mi = 1.076 × 10^-8 AU**

AU = mi × 1.075780018 × 10^-8

To convert miles to astronomical units, multiply by 1.075780018 × 10^-8. The table below gives the values people look up most often, and the converter works for any number.

## Miles to astronomical units table

*Common mile values converted to astronomical units.*

| Miles | Astronomical units |
| --- | --- |
| 1 mi | 1.076 × 10^-8 |
| 2 mi | 2.152 × 10^-8 |
| 3 mi | 3.227 × 10^-8 |
| 4 mi | 4.303 × 10^-8 |
| 5 mi | 5.379 × 10^-8 |
| 10 mi | 1.076 × 10^-7 |
| 15 mi | 1.614 × 10^-7 |
| 20 mi | 2.152 × 10^-7 |
| 25 mi | 2.689 × 10^-7 |
| 30 mi | 3.227 × 10^-7 |
| 40 mi | 4.303 × 10^-7 |
| 50 mi | 5.379 × 10^-7 |
| 75 mi | 8.068 × 10^-7 |
| 100 mi | 0.000001076 |
| 250 mi | 0.000002689 |
| 500 mi | 0.000005379 |
| 1,000 mi | 0.00001076 |

## How the conversion works

The relationship is AU = mi × 1.075780018 × 10^-8. Both units measure length, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

## Common questions

### How many astronomical units are in one mile?

One mile equals 1.076 × 10^-8 astronomical units. AU = mi × 1.075780018 × 10^-8.

### How do you convert miles to astronomical units?

Use AU = mi × 1.075780018 × 10^-8. So 10 mi is 1.076 × 10^-7 AU.

### How many miles are in one astronomical unit?

One astronomical unit equals 92,955,807 miles, which is the reverse of the conversion above.

## Related pages

- [Astronomical units to Miles](https://atoneplace.net/convert/astronomical-units-to-miles/)
- [Miles to Meters](https://atoneplace.net/convert/miles-to-meters/)
- [Miles to Kilometers](https://atoneplace.net/convert/miles-to-km/)
- [Miles to Centimeters](https://atoneplace.net/convert/miles-to-cm/)
- [Miles to Millimeters](https://atoneplace.net/convert/miles-to-mm/)
- [Miles to Yards](https://atoneplace.net/convert/miles-to-yards/)
- [Miles to Feet](https://atoneplace.net/convert/miles-to-feet/)
- [Miles to Inches](https://atoneplace.net/convert/miles-to-inches/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)