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Light-Year Distance Converter — result sheet
Convert light-years into kilometres, metres, astronomical units, and international miles using light speed and a Julian year.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: 1 ly = c × 365.25×86,400 s = 9.4607304725808×10¹⁵ m; au = metres/149,597,870,700.
A light-year is a distance, not a time: it is the distance light travels in one Julian year at the defined speed of light. The converter also expresses the result in au and international miles.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Light-years — ly; minimum -1000000000; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Light-years | 1 |
1 light-year = 9.46073047258 trillion km = about 63,241.077 au.
Assumptions and limits
- The year is the Julian year of exactly 365.25 days and c is 299,792,458 m/s.
- The astronomical unit uses the exact SI-defined value 149,597,870,700 m.
- The result is a unit conversion and does not model cosmological expansion, redshift, or travel time for a spacecraft.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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