---
title: "Feet to Astronomical units — ft to AU converter"
description: "1 foot = 2.037 × 10^-12 astronomical units. Convert feet to astronomical units with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/feet-to-astronomical-units/
site: "At One Place"
---

# Feet to astronomical units

**1 foot in astronomical units: 1 ft = 2.037 × 10^-12 AU**

AU = ft × 2.037462155 × 10^-12

To convert feet to astronomical units, multiply by 2.037462155 × 10^-12. The table below gives the values people look up most often, and the converter works for any number.

## Feet to astronomical units table

*Common foot values converted to astronomical units.*

| Feet | Astronomical units |
| --- | --- |
| 1 ft | 2.037 × 10^-12 |
| 2 ft | 4.075 × 10^-12 |
| 3 ft | 6.112 × 10^-12 |
| 4 ft | 8.15 × 10^-12 |
| 5 ft | 1.019 × 10^-11 |
| 10 ft | 2.037 × 10^-11 |
| 15 ft | 3.056 × 10^-11 |
| 20 ft | 4.075 × 10^-11 |
| 25 ft | 5.094 × 10^-11 |
| 30 ft | 6.112 × 10^-11 |
| 40 ft | 8.15 × 10^-11 |
| 50 ft | 1.019 × 10^-10 |
| 75 ft | 1.528 × 10^-10 |
| 100 ft | 2.037 × 10^-10 |
| 250 ft | 5.094 × 10^-10 |
| 500 ft | 1.019 × 10^-9 |
| 1,000 ft | 2.037 × 10^-9 |

## How the conversion works

The relationship is AU = ft × 2.037462155 × 10^-12. 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.

> Foot: Plural is "feet".

## Common questions

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

One foot equals 2.037 × 10^-12 astronomical units. AU = ft × 2.037462155 × 10^-12.

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

Use AU = ft × 2.037462155 × 10^-12. So 10 ft is 2.037 × 10^-11 AU.

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

One astronomical unit equals 490,806,660,000 feet, which is the reverse of the conversion above.

### Is there more than one kind of foot?

Plural is "feet".

## Related pages

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