Millimeters (mm)	Astronomical Units (AU)
1 mm	6.6846e-15 AU
2 mm	1.3369e-14 AU
5 mm	3.3423e-14 AU
10 mm	6.6846e-14 AU
25 mm	1.6711e-13 AU
50 mm	3.3423e-13 AU
100 mm	6.6846e-13 AU
250 mm	1.6711e-12 AU
500 mm	3.3423e-12 AU
1000 mm	6.6846e-12 AU

Convert Millimeters to Astronomical Units

Convert millimeters to astronomical units (mm to AU) with our instant calculator. 1 mm = 0 AU. Includes exact formula and reference tables.

How to Convert Millimeters to Astronomical Units (mm to AU)

1 Millimeter (mm) is equal to 0 Astronomical Units (AU). Divide the millimeter value by 1.496e+14

Quick Answer 1 mm = 0 AU

Formula AU = mm / 1.496e+14

Inverse Factor 1 AU = 149597870700000 mm

Unit Definitions & Metrology Context

The standard SI base unit of length is the meter (m), defined as the distance traveled by light in a vacuum in 1/299,792,458 of a second.

About Millimeters (mm): Millimeter (mm) is a unit in the Length & Distance measurement category. It is a standard everyday unit of length & distance measurement. Relative to the length & distance base unit, 1 mm equals 0.001 Meters (m).

About Astronomical Units (AU): Astronomical Unit (AU) is a unit in the Length & Distance measurement category. It is widely used in earth-sun distance (solar system). Relative to the length & distance base unit, 1 AU equals 149597870700 Meters (m).

Need to convert in the opposite direction? Visit our Convert Astronomical Units to Millimeters (AU to mm) calculator (1 AU = 149597870700000 mm).

Step-by-Step Worked Examples (mm to AU)

Convert 5 Millimeters to Astronomical Units: Applying the formula (AU = mm / 1.496e+14): starting with 5 mm, divide the millimeter value by 1.496e+14 to get 0 AU.
Convert 10 Millimeters to Astronomical Units: Applying the formula (AU = mm / 1.496e+14): starting with 10 mm, divide the millimeter value by 1.496e+14 to get 0 AU.
Convert 50 Millimeters to Astronomical Units: Applying the formula (AU = mm / 1.496e+14): starting with 50 mm, divide the millimeter value by 1.496e+14 to get 0 AU.

Popular Length & Distance Conversions

Kilometer ⇄ Mile

Multiply kilometers by ~0.621371 to get miles, or divide miles by 0.621371 to get kilometers.

Inch ⇄ Centimeter

1 inch is legally and scientifically defined as exactly 2.54 centimeters.

Foot ⇄ Meter

1 foot is defined as exactly 0.3048 meters (12 inches).

Mile ⇄ Nautical Mile

1 nautical mile is exactly 1,852 meters (~1.15078 statute miles).

Frequently Asked Questions

Verified answers and formulas for converting millimeters to astronomical units.

How many astronomical units are in 1 millimeter?

There are 0 astronomical units (AU) in 1 millimeter (mm). Conversely, 1 astronomical unit equals 149597870700000 millimeters.

How do you convert millimeters to astronomical units?

To convert millimeters (mm) to astronomical units (AU), use the formula: AU = mm / 1.496e+14. Divide the millimeter value by 1.496e+14. For example, 10 mm equals 0 AU.

How do I convert back from astronomical units to millimeters?

To convert in the reverse direction from astronomical units (AU) to millimeters (mm), use the inverse formula: mm = AU × 149597870700000. Multiply the astronomical unit value by 149597870700000 (1 AU = 149597870700000 mm).

What is the difference between millimeter (mm) and astronomical unit (AU)?

Both millimeter and astronomical unit measure length & distance. Millimeter (mm) is a unit in the Length & Distance measurement category. It is a standard everyday unit of length & distance measurement. Relative to the length & distance base unit, 1 mm equals 0.001 Meters (m). Astronomical Unit (AU) is a unit in the Length & Distance measurement category. It is widely used in earth-sun distance (solar system). Relative to the length & distance base unit, 1 AU equals 149597870700 Meters (m).

How many miles are in a kilometer?

There are approximately 0.621371 miles in 1 kilometer. To convert kilometers to miles quickly in your head, multiply by 6 and divide by 10 (or multiply by 0.6).