# Astronomical Units to Rods (au to rd)

Source: https://www.unitconvertercalculator.com/length/astronomical-units-to-rods/

**1 au = 29745858327.368 rd**

One astronomical unit equals approximately 2.976 x 1010 rods, or about 29.8 billion rods. The rod (16.5 feet / 5.0292 m) is a historical English land surveying unit. No land surveyor has ever needed to measure planetary distances, and no astronomer has measured star positions in rods.

## Formula

Convert Astronomical Units to Rods

## Conversion Table

| Astronomical Units (au) | Rods (rd) |
|---|---|
| 1.0E-10 au | 2.9745858327368 rd |
| 1.0E-9 au | 29.745858327368 rd |
| 1.0E-8 au | 297.45858327368 rd |
| 1.0E-7 au | 2974.5858327368 rd |
| 1.0E-6 au | 29745.858327368 rd |
| 1.0E-5 au | 297458.58327368 rd |
| 0.0001 au | 2974585.8327368 rd |
| 0.001 au | 29745858.327368 rd |
| 0.01 au | 297458583.27368 rd |
| 0.1 au | 2974585832.7368 rd |
| 1 au | 29745858327.368 rd |

## Units

### 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.

### Rod (rd)

Exactly 16.5 feet or 5.5 yards (5.0292 m). Also called a perch or pole. Historically used in land surveying.

## Background

One rod (5.0292 m) fits about 29.8 billion times into the Earth-Sun distance. The entire length of Hadrian's Wall (73 miles / about 23,450 rods) is only 0.000786 AU. These units exist in completely separate measurement worlds separated by about 10 orders of magnitude.

## Good to Know

The rod helped build the English countryside through land surveying. The AU helps us understand our solar system through orbital mechanics. Both units were created to solve practical problems, just at incompatible scales.

## FAQ

### How many rods are in 1 AU?

One AU contains approximately 2.976 x 1010 rods (about 29.8 billion). Since 1 rod = 5.0292 meters and 1 AU = 149,597,870,700 meters, divide accordingly.

### How long is a rod in AU?

One rod is approximately 3.361 x 10-11 AU, or about 34 trillionths of an AU. A rod is vanishingly small on the astronomical scale.

### Is this conversion practical?

No. The rod is a historical land surveying unit with no modern applications beyond interpreting old property deeds. The AU measures planetary orbits. These fields are completely separate.

## Non-Frequently Asked Questions

### How many rod-lengths is a medieval village?

A typical medieval English village occupied about 200-500 rods of road frontage with strips extending 40 rods (1 furlong) back from the road. The entire village was perhaps 200 x 40 = 8,000 square rods (50 acres). A surveyor could map the whole village in a day. The rod was village-scale precision.

## Related Articles

- [Why We Measure: The Deepest Urge in Human Civilisation](https://www.unitconvertercalculator.com/blog/why-we-measure)
- [The Map Is Not the Territory: Why Every Measurement Is Wrong](https://www.unitconvertercalculator.com/blog/the-map-is-not-the-territory)
- [Zero: The Most Dangerous Number in Measurement](https://www.unitconvertercalculator.com/blog/zero-the-most-dangerous-number-in-measurement)
- [The Body as a Ruler: Every Measurement Unit That Came From Us](https://www.unitconvertercalculator.com/blog/the-body-as-a-ruler)
- [The Speed of Everything: How We Measure From Glaciers to Light](https://www.unitconvertercalculator.com/blog/the-speed-of-everything)
- [15 Obscure Measurement Units You've Never Heard Of (But Still Need)](https://www.unitconvertercalculator.com/blog/obscure-measurement-units-guide)
- [When Measurements Go Wrong - Disasters, Blunders and Happy Accidents](https://www.unitconvertercalculator.com/blog/when-measurements-go-wrong)
- [The Surprising Stories Behind Everyday Units of Measurement](https://www.unitconvertercalculator.com/blog/stories-behind-measurement-units)
- [Metric vs. Imperial - The Complete Guide to the World's Two Measurement Systems](https://www.unitconvertercalculator.com/blog/metric-vs-imperial-complete-guide)
- [Length & Distance Conversion Guide - Meters, Feet, Miles & Kilometers](https://www.unitconvertercalculator.com/blog/length-and-distance-guide)

## See Also

- [Rods to Astronomical Units](https://www.unitconvertercalculator.com/length/rods-to-astronomical-units/)