Astronomy DistanceLight Seconds to Earth Radii

Light-Seconds to Earth Radii

Snapshot

1 Light-Second equals 47.055728 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 Light-Seconds, the result equals 94.111456 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

47.055728 Earth Radii (R_earth)

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Machine access

Available to apps and AI agents

Light-Seconds 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: light_seconds
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": "light_seconds",
  "to": "earth_radii"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "astronomy-distance",
    "value": 1,
    "from": "light_seconds",
    "to": "earth_radii",
    "result": {
      "raw": 47.055728129,
      "display": "47.055728"
    },
    "canonicalPath": "/astronomy-distance/light-seconds-to-earth-radii/"
  }
}

Full API documentation

Explanation

Formula: Earth Radii = Light-Seconds × 47.055728. 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.

Light-Seconds (ls): the distance light travels in one second in vacuum, useful for short astronomical communication and orbital 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 Light-Second = 47.055728 Earth Radii.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Light-Seconds (ls)	Earth Radii (R_earth)
1	47.055728
2	94.111456
5	235.278641
10	470.557281
100	4,705.573
1,000	47,055.728

Questions & answers

Frequently Asked Questions

How is Light-Seconds 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 Light-Seconds to Earth Radii?

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

Can I use decimal values for Light-Seconds to Earth Radii?

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