Mil/Thou to Light Year Conversion Calculator: Free Online Tool
Convert mils to light years with our free online length converter.
Mil/Thou to Light Year Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Mil/Thou).
- The converted value in Light Year will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Length category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Mil/Thou to Light Year
Converting Mil/Thou to Light Year involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Mil/Thou = 2.6847e-21 light yearsExample Calculation:
Convert 10 mils: 10 × 2.6847e-21 = 2.6847e-20 light years
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Mil/Thou and a Light Year?
A mil (also known as a thou) is a unit of length equal to one thousandth of an inch (0.001 inches or 25.4 micrometers).
A light-year is a unit of astronomical distance equal to the distance that light travels in one Julian year in a vacuum (approximately 9.461 trillion kilometers or 5.879 trillion miles).
Note: The Mil/Thou is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Light Year belongs to the imperial/US customary system.
History of the Mil/Thou and Light Year
The unit originates from precision engineering and manufacturing where small tolerances are critical.
The concept was first used by Friedrich Bessel in 1838 when measuring the distance to the star 61 Cygni.
Common Uses for mils and light years
Explore the typical applications for both Mil/Thou (imperial/US) and Light Year (imperial/US) to understand their common contexts.
Common Uses for mils
- Measuring thickness of materials (e.g., paper, plastic film, coatings)
- Specifying manufacturing tolerances
- Electronics (e.g., PCB trace widths)
Common Uses for light years
- Measuring distances to stars and galaxies
- Expressing the vast scale of the universe in astronomy
Frequently Asked Questions
Questions About Mil/Thou (mil)
Is a mil the same as a millimeter?
No, a mil (0.001 inches) is much smaller than a millimeter (0.001 meters). 1 millimeter is approximately 39.37 mils.
Is 'mil' short for millimeter?
No, 'mil' is short for the Latin 'mille', meaning thousandth (of an inch). It is not an abbreviation for millimeter (mm).
What does 'thou' mean in this context?
'Thou' is another common name for a mil, also meaning one thousandth (of an inch). It is frequently used in engineering and machining.
About Light Year (ly)
Is a light-year a unit of time or distance?
A light-year (ly) is a unit of distance, not time. It represents the distance light travels in one year.
How far is a light-year in kilometers and miles?
One light-year is approximately 9.461 trillion kilometers (9.461 x 10^12 km) or 5.879 trillion miles (5.879 x 10^12 mi).
What is the closest star to Earth in light-years?
Excluding the Sun, the closest star system to Earth is Alpha Centauri, which is about 4.37 light-years away.
Conversion Table: Mil/Thou to Light Year
| Mil/Thou (mil) | Light Year (ly) |
|---|---|
| 1 | 0 |
| 5 | 0 |
| 10 | 0 |
| 25 | 0 |
| 50 | 0 |
| 100 | 0 |
| 500 | 0 |
| 1,000 | 0 |
All Length Conversions
Other Units from Length
- Meter (m)
- Kilometer (km)
- Hectometer (hm)
- Decimeter (dm)
- Centimeter (cm)
- Millimeter (mm)
- Inch (in)
- Foot (ft)
- Yard (yd)
- Mile (mi)
- Nautical Mile (NM)
- Micrometer (μm)
- Nanometer (nm)
- Astronomical Unit (AU)
- Parsec (pc)
- Angstrom (Å)
- Point (Typography) (pt)
- Fathom (fath)
- Furlong (fur)
- Link (Gunter's) (li)
- Pace (pace)
- Span (span)
- Digit (digit)
- Cable Length (cb)
- Ell (ell)
- Finger (finger)
- Roman Mile (m.p.)
- Stadion (stadion)
- Chi (Chinese) (chi)
- Shaku (Japanese) (shaku)
- Li (Chinese) (li)
- Toise (toise)
- Bolt (bolt)
- Rope (rope)
- Smoot (smoot)
- Sajene (sajene)
- Ken (ken)
- Wa (wa)
- Vara (vara)
- Aln (aln)
- Cubit (Royal/Egyptian) (cubit)
- Versta (versta)
- Arpent (arpent)
- Ri (Japanese) (ri)
- Klafter (klafter)
- Yojana (yojana)
- Skein (skein)