Astronomy DistanceEarth Diameters to Earth Radii

Earth Diameters to Earth Radii

Snapshot

1 Earth Diameter equals 2 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 Earth Diameters, the result equals 4 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

2 Earth Radii (R_earth)

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Machine access

Available to apps and AI agents

Earth Diameters 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: earth_diameters
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": "earth_diameters",
  "to": "earth_radii"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "astronomy-distance",
    "value": 1,
    "from": "earth_diameters",
    "to": "earth_radii",
    "result": {
      "raw": 2,
      "display": "2"
    },
    "canonicalPath": "/astronomy-distance/earth-diameters-to-earth-radii/"
  }
}

Full API documentation

Explanation

Formula: Earth Radii = Earth Diameters × 2. 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.

Earth Diameters (D_earth): a comparative planetary size-distance unit based on Earth's mean diameter.

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 Earth Diameter = 2 Earth Radii.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Earth Diameters (D_earth)	Earth Radii (R_earth)
1	2
2	4
5	10
10	20
100	200
1,000	2,000

Questions & answers

Frequently Asked Questions

How is Earth Diameters to Earth Radii calculated?

The factor is derived by reducing both units to meters and applying the fixed planetary or solar radius/diameter reference constants for the route.

How do I reverse Earth Diameters to Earth Radii?

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

Can I use decimal values for Earth Diameters to Earth Radii?

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