Astronomy DistanceAstronomical Units to Earth Radii

Astronomical Units to Earth Radii

Snapshot

1 Astronomical Unit equals 23,481.033 Earth Radii. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses a fixed factor based on canonical reference constants.
Example: For 2 Astronomical Units, the result equals 46,962.067 Earth Radii.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

23,481.033 Earth Radii (R_earth)

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Machine access

Available to apps and AI agents

Astronomical Units to Earth Radii can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The identifiers below select the same calculation as the calculator.

Machine-readable identifiers

Conversion family: astronomy-distance
Source unit: astronomical_units
Target unit: earth_radii

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "astronomy-distance",
  "value": 1,
  "from": "astronomical_units",
  "to": "earth_radii"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "astronomy-distance",
    "value": 1,
    "from": "astronomical_units",
    "to": "earth_radii",
    "result": {
      "raw": 23481.0334432,
      "display": "23,481.033"
    },
    "canonicalPath": "/astronomy-distance/astronomical-units-to-earth-radii/"
  }
}

Full API documentation

Explanation

Formula: Earth Radii = Astronomical Units × 23,481.033. Why: AU, lunar distance, and planetary radius or diameter units are tied to fixed astronomy reference constants, so the route moves through one meter-based normalization path.

Astronomical Units (AU): a standard astronomy distance unit defined exactly as 149,597,870,700 meters, commonly used for Solar System scales.

Earth Radii (R_earth): a planetary scale unit based on Earth's reference radius, useful for comparative astronomy and planetary science.

This route is useful when comparing Solar System and planetary-scale distances using AU, lunar-distance, and Earth or Solar reference units.

This conversion is purely multiplicative because both units reduce through meters using fixed astronomical or geometric reference constants with no offset.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Astronomical Unit = 23,481.033 Earth Radii.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Astronomical Units (AU)	Earth Radii (R_earth)
1	23,481.033
2	46,962.067
5	117,405.167
10	234,810.334
100	2,348,103.344
1,000	23,481,033.443

Questions & answers

Frequently Asked Questions

How is Astronomical Units to Earth Radii calculated?

The factor is derived by reducing both units to meters and applying the fixed astronomy reference constants for AU, light-seconds, or lunar-distance scales.

How do I reverse Astronomical Units to Earth Radii?

Use the mirror Earth Radii to Astronomical Units route; it applies the inverse relationship for the opposite direction with the same assumptions.

Can I use decimal values for Astronomical Units to Earth Radii?

Yes. Decimal inputs are supported for Astronomical Units to Earth Radii, and the mirror direction keeps inverse assumptions aligned.