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About this tool
Convert nautical miles to light-years instantly. Free, bidirectional, and fully in-browser.
1 nautical mile equals 1.957566e-13 light-years — enter any nautical mile value to convert it to light-years instantly. This Nautical mile to Light-year converter is a client-side tool: it applies a single multiplication (ly = nmi × 1.957566e-13) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert light-years back to nautical miles. A reference table lists common nautical mile values already converted, and nothing you enter is sent to a server.
Open Nautical mile to Light-year Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Nautical mile field.
Read the equivalent in light-years in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert light-years to nautical miles.
The result updates as you type, and the swap button flips the conversion to light-year → nautical mile without reloading.
The conversion uses the precise factor (ly = nmi × 1.957566e-13), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One nautical mile is 1.957566e-13 light-years. Multiply the nautical mile value by 1.957566e-13 to convert. For example, 10 nmi = 1.957566e-12 ly.
ly = nmi × 1.957566e-13. This tool applies it automatically and shows a worked example: 10 nmi = 1.957566e-12 ly.
Yes. Press the swap button, or type into the light-year field, and the tool converts light-years to nautical miles using the inverse of the same relationship.
It uses the standard distance and length definition (ly = nmi × 1.957566e-13), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Nautical mile to Light-year Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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