Astronomical Unit to Millimeter Conversion Calculator: Free Online Tool
Convert astronomical units to millimeters with our free online length converter.
Astronomical Unit to Millimeter Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Astronomical Unit).
- The converted value in Millimeter 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 Astronomical Unit to Millimeter
Converting Astronomical Unit to Millimeter involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Astronomical Unit = 1.4960e+14 millimetersExample Calculation:
Convert 10 astronomical units: 10 × 1.4960e+14 = 1.4960e+15 millimeters
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 Astronomical Unit and a Millimeter?
An astronomical unit is a unit of length roughly equal to the average distance between Earth and the Sun. It is defined as exactly 149,597,870,700 meters.
The millimeter is a unit of length in the metric system equal to one-thousandth of a meter (1/1000 m) or one-tenth of a centimeter (1/10 cm). It is used for very precise measurements.
Note: The Astronomical Unit is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Millimeter belongs to the metric (SI) system.
History of the Astronomical Unit and Millimeter
Historically used to measure distances within the Solar System, its value was refined over centuries through astronomical observations. The exact definition was adopted by the IAU in 2012.
Defined as a subunit of the meter within the original metric system, the millimeter provides a standard unit for fine measurements required in science, engineering, and manufacturing.
Common Uses for astronomical units and millimeters
Explore the typical applications for both Astronomical Unit (imperial/US) and Millimeter (metric) to understand their common contexts.
Common Uses for astronomical units
- Measuring distances within the Solar System (e.g., planet orbits)
- Expressing distances to near-Earth objects
Common Uses for millimeters
- Engineering & Machining: Precise engineering and machining measurements.
- Technical Design: Technical drawings and specifications.
- Electronics: Measuring small electronic components or wire gauges.
- Meteorology: Measuring rainfall amounts.
- Science: Scientific measurements requiring high precision (e.g., microscopy).
Frequently Asked Questions
Questions About Astronomical Unit (AU)
Why use Astronomical Units instead of kilometers or miles?
Astronomical Units (AU) provide a more convenient scale for the vast distances within our solar system. Expressing interplanetary distances in km or miles results in extremely large and unwieldy numbers.
How many kilometers/miles is 1 AU?
1 Astronomical Unit (AU) is approximately 149.6 million kilometers or 93 million miles.
How long does it take light to travel 1 AU?
It takes sunlight approximately 8 minutes and 20 seconds to travel the distance of one Astronomical Unit from the Sun to the Earth.
About Millimeter (mm)
How many millimeters are in a centimeter?
There are 10 millimeters (mm) in 1 centimeter (cm).
How many millimeters are in a meter?
There are 1,000 millimeters (mm) in 1 meter (m).
What does 'milli' mean in millimeter?
The prefix 'milli' denotes one-thousandth (1/1000).
Conversion Table: Astronomical Unit to Millimeter
| Astronomical Unit (AU) | Millimeter (mm) |
|---|---|
| 1 | 149,600,000,000,000 |
| 5 | 748,000,000,000,000 |
| 10 | 1,496,000,000,000,000 |
| 25 | 3,740,000,000,000,000 |
| 50 | 7,480,000,000,000,000 |
| 100 | 14,960,000,000,000,000 |
| 500 | 74,800,000,000,000,000 |
| 1,000 | 149,600,000,000,000,000 |