Astronomical Unit Converter
Astronomical Unit Converter changes a distance between astronomical units, kilometers, miles, meters, and light-years using fixed meter-based factors and returns the converted value.
What this calculator does
The Astronomical Unit Converter estimates your result instantly from the values you enter, using standard math & conversions formulas. Astronomical Unit Converter changes a distance between astronomical units, kilometers, miles, meters, and light-years using fixed meter-based factors and returns the converted value. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Astronomical Unit Converter
This converter moves a distance between astronomical units (AU), kilometers, miles, meters, and light-years. Each unit has a fixed value in meters, so the input is scaled to meters and then to the target unit.
The tool uses 1 AU = 149597870700 m and 1 light-year = 9460730472580800 m.
Formula & Mathematical Calculation
Converted Value = f(Distance, From, To)
Calculated according to standard math formulas implemented in the calculator core.
Calculation Example
Convert 1 AU to kilometers. Using the built-in factors, the tool computes 1 × 149597870700 ÷ 1000 = 149597870.7. The Converted Value reads 149597870.7 km.
Key Benefits
- Switches between five astronomical distance units
- Uses the exact meter value of an astronomical unit (149597870700 m)
- Includes light-years for interstellar-scale distances
- Shows results to six decimal places with the unit label
How to Use this Calculator
-
Enter the distance
Type the distance amount into the Distance field. -
Select the source unit
Choose the current unit in the From menu. -
Select the target unit
Choose the unit you want in the To menu. -
Calculate
Select Calculate and read the Converted Value.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Astronomical Unit Converter produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.