Convert centimeters to astronomical units
1 cm = 0.0000000000000668458712227 au — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
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Show this value in all 50 length units
- Gigameters Gm 1e-11
- Megameters Mm 1e-8
- Kilometers km 0.000 01
- Hectometers hm 0.0001
- Decameters dam 0.001
- Meters m 0.01
- Decimeters dm 0.1
- Centimeters cm 1
- Millimeters mm 10
- Micrometers µm 10 000
- Nanometers nm 10 000 000
- Picometers pm 10 000 000 000
- Femtometers fm 10 000 000 000 000
- Inches in 0.393 700 787 402
- Feet ft 0.032 808 398 950 1
- Yards yd 0.010 936 132 983 4
- Miles mi 0.000 006 213 711 922 37
- Nautical miles nmi 0.000 005 399 568 034 56
- Thous thou 393.700 787 402
- Hands hh 0.098 425 196 850 4
- Links li 0.049 709 695 379
- Spans span 0.043 744 531 933 5
- Cubits cubit 0.021 872 265 966 8
- Ells ell 0.008 748 906 386 7
- Fathoms ftm 0.005 468 066 491 69
- Rods rd 0.001 988 387 815 16
- Chains ch 0.000 497 096 953 79
- Furlongs fur 0.000 049 709 695 379
- Leagues lea 0.000 002 071 237 307 46
- Barleycorns barleycorn 1.181 102 362 2
- US survey feet ft (US) 0.032 808 333 333 3
- US survey miles mi (US) 0.000 006 213 699 494 95
- Ångströms Å 100 000 000
- Microns µ 10 000
- Bohr radiuss a₀ 188 972 612.591
- Planck lengths ℓₚ 6.18714249917e+32
- Astronomical units au 6.68458712227e-14
- Light-years ly 1.05700083402e-18
- Light-seconds ls 3.33564095198e-11
- Light-minutes lmin 5.55940158664e-13
- Parsecs pc 3.24077928944e-19
- Kiloparsecs kpc 3.24077928944e-22
- Megaparsecs Mpc 3.24077928944e-25
- Solar radiuss R☉ 1.43740117867e-11
- Earth radiuss R🜨 1.56961230576e-9
- Point (DTP)s pt 28.346 456 692 9
- Picas pc 2.362 204 724 41
- Scandinavian miles mil 0.000 001
- Versts вер 0.000 009 373 828 271 47
- Lis 里 0.000 02
Every row is Centimeter (cm) converted through the meter, in exact rational arithmetic.
How to convert centimeters to astronomical units
Multiply the number of centimeters by 0.0000000000000668458712227 to get astronomical units.
Astronomical unit: Fixed at exactly 149 597 870 700 m by the IAU in 2012.
Centimeter to Astronomical unit conversion table
| Centimeters (cm) | Astronomical units (au) |
|---|---|
| 1 cm | 6.6845871e-14 |
| 2 cm | 1.3369174e-13 |
| 3 cm | 2.0053761e-13 |
| 5 cm | 3.3422936e-13 |
| 10 cm | 6.6845871e-13 |
| 20 cm | 1.3369174e-12 |
| 25 cm | 1.6711468e-12 |
| 50 cm | 3.3422936e-12 |
| 100 cm | 6.6845871e-12 |
| 250 cm | 1.6711468e-11 |
| 500 cm | 3.3422936e-11 |
| 1000 cm | 6.6845871e-11 |
Astronomical unit to Centimeter conversion table
| Astronomical units (au) | Centimeters (cm) |
|---|---|
| 1 au | 14 959 787 000 000 |
| 2 au | 29 919 574 000 000 |
| 3 au | 44 879 361 000 000 |
| 5 au | 74 798 935 000 000 |
| 10 au | 149 597 870 000 000 |
| 20 au | 299 195 740 000 000 |
| 25 au | 373 994 680 000 000 |
| 50 au | 747 989 350 000 000 |
| 100 au | 1 495 978 700 000 000 |
| 250 au | 3 739 946 800 000 000 |
| 500 au | 7 479 893 500 000 000 |
| 1000 au | 1.4959787e+16 |
Frequently asked
How many astronomical units are in a centimeter?
One centimeter equals 6.684587122e-14 astronomical units (cm → au). That figure is exact, not rounded.
How do you convert centimeters to astronomical units?
Multiply the number of centimeters by 0.0000000000000668458712227 to get astronomical units.
What is 1 au in centimeters?
One astronomical unit is 14959787070000 centimeters.
What is 10 cm in au?
10 cm = 6.6845871e-13 au.
What exactly is a astronomical unit?
Fixed at exactly 149 597 870 700 m by the IAU in 2012.