Centimeters to Astronomical Units Converter (cm to AU)

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Live Conversion • BIPM SI Brochure (9th Edition) Certified

1 Centimeter = 6.68458712 × 10⁻¹⁴ Astronomical Unit

1 cm = 6.684587 × 10⁻¹⁴ AU • 1 AU = 1.495979 × 10¹³ cm

Decimals:

Certified Authority Value

0.00000000

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Swap to Astronomical Unit to Centimeter

To / Result

Quick Values:

Conversion Formula

To convert Centimeter to Astronomical Unit, multiply by 6.68458712 × 10⁻¹⁴

cm × 6.68458712 × 10⁻¹⁴ = AU

Calculation: 1 cm × 6.68458712 × 10⁻¹⁴ = 6.68458712 × 10⁻¹⁴ AU

Common Centimeter to Astronomical Unit Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Centimeter (cm) and Astronomical Unit (AU).

Tap any row to calculate

Centimeter to Astronomical Unit: Primary Direct Table (15 Steps)

Rule: 1 Centimeter is equal to 6.684587 × 10⁻¹⁴ AU (Astronomical Unit)

Centimeter to Astronomical Unit Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 cm 6.684587 × 10⁻¹⁷ AU	6.685 × 10⁻¹⁷
0.01 cm 6.684587 × 10⁻¹⁶ AU	6.685 × 10⁻¹⁶
0.1 cm 6.684587 × 10⁻¹⁵ AU	6.685 × 10⁻¹⁵
0.5 cm 3.342294 × 10⁻¹⁴ AU	3.342 × 10⁻¹⁴
1 cm 6.684587 × 10⁻¹⁴ AU	6.685 × 10⁻¹⁴
2 cm 1.336917 × 10⁻¹³ AU	1.337 × 10⁻¹³
5 cm 3.342294 × 10⁻¹³ AU	3.342 × 10⁻¹³
10 cm 6.684587 × 10⁻¹³ AU	6.685 × 10⁻¹³
20 cm 1.336917 × 10⁻¹² AU	1.337 × 10⁻¹²
25 cm 1.671147 × 10⁻¹² AU	1.671 × 10⁻¹²
50 cm 3.342294 × 10⁻¹² AU	3.342 × 10⁻¹²
100 cm 6.684587 × 10⁻¹² AU	6.685 × 10⁻¹²
250 cm 1.671147 × 10⁻¹¹ AU	1.671 × 10⁻¹¹
500 cm 3.342294 × 10⁻¹¹ AU	3.342 × 10⁻¹¹
1000 cm 6.684587 × 10⁻¹¹ AU	6.685 × 10⁻¹¹

Astronomical Unit to Centimeter: Reciprocal Summary

Rule: 1 Astronomical Unit is equal to 1.495979 × 10¹³ cm (Centimeter)

Astronomical Unit to Centimeter Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 AU 1.495979 × 10¹³ cm	1.496 × 10¹³
5 AU 7.479894 × 10¹³ cm	7.48 × 10¹³
10 AU 1.495979 × 10¹⁴ cm	1.496 × 10¹⁴
50 AU 7.479894 × 10¹⁴ cm	7.48 × 10¹⁴
100 AU 1.495979 × 10¹⁵ cm	1.496 × 10¹⁵

View Complete 15-Row Astronomical Unit to Centimeter Table

Real-World Context & Everyday Benchmarks

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To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Centimeter (cm) and Astronomical Unit (AU):

Centimeter References:

Standard wooden HB pencil hexagon barrel diameter 0.7 cm
Standard steel office paperclip total length 3.5 cm
Standard dining room teaspoon length 15 cm
Standard student wooden school ruler length 30 cm

Astronomical Unit References:

Average orbital distance separating planet Earth from the Sun 1 AU
Average orbital distance of red planet Mars from the Sun 1.52 AU
Average orbital distance of gas giant Jupiter from the Sun 5.2 AU
Distance from the Sun to NASA Voyager 1 interstellar space probe 160 AU

Tap any benchmark above to automatically calculate its exact equivalent in Astronomical Unit.

ISQ Dimension: [L] Coherent SI Unit: meter (m) Classical Mechanics & Dimensional Metrology

How to Convert Centimeter to Astronomical Unit

Converting Centimeter (cm) to Astronomical Unit (AU) is a core calculation in Length and Distance, which measures the 1-dimensional spatial separation or extent between two distinct points. Because Astronomical Unit is a broader physical scale than Centimeter, converting from cm to AU condenses the numerical figure. It takes 1.495979 × 10¹³ Centimeter to equal a single Astronomical Unit (1 cm = 6.684587 × 10⁻¹⁴ AU). To convert any quantity, multiply by 6.684587 × 10⁻¹⁴ (or divide by 1.495979 × 10¹³).

Direct Factor1 cm = 6.684587 × 10⁻¹⁴ AU

Inverse Ratio1 AU = 1.495979 × 10¹³ cm

Conversion ScaleDirect Proportional Magnitude Compression

First-Principles SI Derivation ProofNIST SP 811 / ISO 80000 Compliance

Mathematical Conversion Derivation via Coherent SI Base Unit

Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (meter (m)) without arbitrary rounding:

V_{\text{target}} = V_{\text{source}} \times \left( \frac{k_{\text{source} \to \text{SI}}}{k_{\text{target} \to \text{SI}}} \right)

Universal Dimensional Conversion Law (ISO 80000 / NIST SP 811)

1. Source SI Bridge (k_source):1 cm = 0.01 meter (m)

2. Target SI Bridge (k_target):1 AU = 1.495979 × 10¹¹ meter (m)

Step-by-step substitution for Centimeter → Astronomical Unit:V(AU) = V(cm) × ( 0.01 / 1.495979 × 10¹¹ ) = V(cm) × 6.684587 × 10⁻¹⁴

Mathematical FormulaValue in Astronomical Unit = Value in Centimeter × 6.68458712 × 10⁻¹⁴Direct computational formula applied for standard conversion.

Worked Example

To convert 12 Centimeter (cm) to Astronomical Unit (AU): multiply 12 by 6.684587 × 10⁻¹⁴ to get 8.021505 × 10⁻¹³ AU. At an industrial engineering scale, 240 cm converts to 1.604301 × 10⁻¹¹ AU.

Inverse check: 1 AU = 1.495979 × 10¹³ cm.

Understanding Centimeter and Astronomical Unit

Domain Metrology & Engineering Applications

Governing Law & Equation

Definition of the Speed of Light in Vacuum (c ≡ 299,792,458 m/s)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using laser distance interferometers, digital vernier calipers, ultrasonic thickness gauges, and geodetic total stations.

Primary Industry Sectors

Applied across civil construction, aerospace manufacturing, precision CNC machining, and geodetic land surveying under international metrology standard BIPM SI Brochure (9th Edition), ISO 80000-3:2019.

Physical Orders of Magnitude & Laboratory Reference Benchmarks

Physical Phenomenon / Engineering Reference	Reference Value	Converted to Astronomical Unit
Standard wooden HB pencil hexagon barrel diameter	`0.7 cm`	`4.679211 × 10⁻¹⁴ AU`
Standard steel office paperclip total length	`3.5 cm`	`2.339605 × 10⁻¹³ AU`
Standard dining room teaspoon length	`15 cm`	`1.002688 × 10⁻¹² AU`
Standard student wooden school ruler length	`30 cm`	`2.005376 × 10⁻¹² AU`

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the BIPM SI Brochure (9th Edition), ISO 80000-3:2019. Governed by Definition of the Speed of Light in Vacuum (c ≡ 299,792,458 m/s) under ISO 80000 dimensional vector [L].

Multi-Variable Engineering Bridge Kinematics & Transit Trajectory

Distance to Travel Time Kinematics Bridge (Seconds • Minutes • Hours • Days • Milliseconds)

Calculate elapsed transit time t = d / v across transportation modes and physics benchmarks, bridging spatial distance [L] and temporal duration [T] via velocity (v).

Input Travel Distance (d): cm

Select Transit Velocity: 29.17 m/s

Governing Law: t = d / v

Vector: [m] ÷ [m/s] → [s]

Live Calculated Bridge Equivalent:

1 cm at Highway Passenger Vehicle (105 km/h / 65 mph) = 0.0003429 s

Equals 5.7143 × 10⁻⁶ min • 9.5238 × 10⁻⁸ h • 3.9682 × 10⁻⁹ d

SI Time

0.0003429

Seconds

Operational Time

5.7143 × 10⁻⁶

min

Minutes

Transit Duration

9.5238 × 10⁻⁸

Hours

Calendar Span

3.9682 × 10⁻⁹

Days

Electronics Scale

0.34

Milliseconds

High Speed Physics

342.86

μs

Microseconds

Step-by-Step Numerical Derivation Proof View Derivation

1. Normalize Input to SI Base Unit (m):
d = 1 cm × 0.01 = 0.01 m
2. Apply Engineering Parameter (v):
Selected condition: Highway Passenger Vehicle (105 km/h / 65 mph) at v = 29.1667 m/s
3. Execute Governing Physical Law in SI Units:
t = d / v = (0.01 m) ÷ (29.1667 m/s) = 0.00034286 s
4. Convert to Standard Engineering Units:
• s: 0.00034286 × 1 = 0.0003429 s (Seconds) • min: 0.00034286 × 0.01667 = 5.7143 × 10⁻⁶ min (Minutes) • h: 0.00034286 × 0.0002778 = 9.5238 × 10⁻⁸ h (Hours) • d: 0.00034286 × 1.1574 × 10⁻⁵ = 3.9682 × 10⁻⁹ d (Days) • ms: 0.00034286 × 1000 = 0.34 ms (Milliseconds) • μs: 0.00034286 × 1000000 = 342.86 μs (Microseconds)

Explore Full Speed Converter →

Engineering Substance / Operating Standard	Parameter Value (m/s)	Reference State / Condition	Typical Industrial & Engineering Application
Pedestrian Walking Pace (5 km/h)	`1.3889`	1.39 m/s (5.0 km/h)	Standard urban pedestrian transit velocity
Urban Commuter Bicycle (20 km/h)	`5.5556`	5.56 m/s (20.0 km/h)	City cycle lane & electric scooter transit
Highway Passenger Vehicle (105 km/h / 65 mph)	`29.1667`	29.17 m/s (105 km/h)	US Interstate / European motorway cruising
High-Speed Rail / Bullet Train (300 km/h)	`83.3333`	83.33 m/s (300 km/h)	Shinkansen / TGV / ICE commercial express
Commercial Airliner Cruise (900 km/h / Mach 0.78)	`250`	250.0 m/s (900 km/h)	Boeing 787 / Airbus A350 cruising velocity
Speed of Sound in Air (Sea Level, 20°C)	`343`	343.0 m/s (1 atm, 20°C)	Acoustic wave propagation (Mach 1.0)

Frequently Asked Questions

There are exactly 6.68458712 × 10⁻¹⁴ astronomical units (AU) in 1 centimeter (cm). To calculate larger amounts manually, simply multiply your total number of centimeters by the conversion multiplier of 6.68458712 × 10⁻¹⁴.

The mathematical formula to convert centimeters to astronomical units is: [value] * 6.68458712 × 10⁻¹⁴ = astronomical units. Rather than doing the math manually, you can use our high-precision online calculator to process this exact equation instantly without rounding errors.

To perform the reverse calculation from astronomical units back to centimeters, you must divide your starting value by 6.68458712 × 10⁻¹⁴. Our bidirectional tool automatically computes this inverse equation the moment you type into the astronomical unit input field.

1 Astronomical Unit is larger than 1 Centimeter. Specifically, 1 Centimeter equals 6.68458712 × 10⁻¹⁴ astronomical units, meaning 1 Astronomical Unit is 1.496 × 10¹³ times larger than 1 Centimeter (a difference of 13.17 orders of magnitude). Expressing measurements in centimeters requires a larger numerical value to represent the equivalent physical magnitude.

A typical standard wooden HB pencil hexagon barrel diameter measures 0.7 cm, which corresponds to 4.6792 × 10⁻¹⁴ Astronomical Unit (Astronomical Unit).