Convert Angstroms to Kilometers
1 angstrom (Å) equals 1 × 10⁻¹³ kilometers (km).
1 Å = 1e-13 km
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk angstrom to kilometer converter to paste a column from Excel.
How to Convert Angstrom to Kilometer
- 1 Å = 1 × 10⁻¹³ km
- 1 km = 10000000000000 Å
- Example: convert 15 Å to km: 15 Å = 15 × 1 × 10⁻¹³ km = 1.5 × 10⁻¹² km
Formula
km = Å ÷ 10000000000000
Derivation from SI units:
- 1 Å = 10⁻¹⁰ m = 0.1 nm
- 1 km = 10³ m
- 1 Å = 1 × 10⁻¹⁰ m ÷ 1000 m per km = 1 × 10⁻¹³ km
Both units are defined exactly, so the factor is exact. Angstrom definition: angstrom; Kilometer definition: kilometer.
Worked examples
- A reading of 2 Å converts to 2 × 10⁻¹³ km.
2 Å × 1 × 10⁻¹³ = 2 × 10⁻¹³ km - A value of 50 Å is 5 × 10⁻¹² km.
50 Å × 1 × 10⁻¹³ = 5 × 10⁻¹² km
Angstrom to Kilometer conversion table
| Angstroms (Å) | Kilometers (km) |
|---|---|
| 0.5 Å | 5 × 10⁻¹⁴ km |
| 1 Å | 1 × 10⁻¹³ km |
| 1.5 Å | 1.5 × 10⁻¹³ km |
| 2 Å | 2 × 10⁻¹³ km |
| 3 Å | 3 × 10⁻¹³ km |
| 5 Å | 5 × 10⁻¹³ km |
| 10 Å | 1 × 10⁻¹² km |
| 50 Å | 5 × 10⁻¹² km |
| 100 Å | 1 × 10⁻¹¹ km |
| 1000 Å | 1 × 10⁻¹⁰ km |
| 5000 Å | 5 × 10⁻¹⁰ km |
Where it's used
Angstroms are used for atomic radii and bond lengths (C–C ≈ 1.54 Å), while kilometers appear in road distances and speed (km/h). Both measure length and distance, so the conversion is a fixed factor.
Angstrom to other length units
| Conversion | 1 Å equals |
|---|---|
| angstrom to meter | 1 × 10⁻¹⁰ m |
| angstrom to kilometer | 1 × 10⁻¹³ km |
| angstrom to centimeter | 1 × 10⁻⁸ cm |
| angstrom to millimeter | 1 × 10⁻⁷ mm |
| angstrom to micrometer | 0.0001 µm |
| angstrom to nanometer | 0.1 nm |
| angstrom to mile | 6.213711922 × 10⁻¹⁴ mi |
| angstrom to yard | 1.093613298 × 10⁻¹⁰ yd |
| angstrom to foot | 3.280839895 × 10⁻¹⁰ ft |
| angstrom to inch | 3.937007874 × 10⁻⁹ in |
| angstrom to mil | 0.000003937007874 mil |
| angstrom to nautical mile | 5.399568035 × 10⁻¹⁴ nmi |
Frequently asked questions
How many kilometers are in 1 angstrom?
1 Å = 1 × 10⁻¹³ km.
How do I convert angstroms to kilometers?
Multiply the value in Å by 1 × 10⁻¹³, or divide it by 10000000000000. For example, 15 Å × 1 × 10⁻¹³ = 1.5 × 10⁻¹² km.
Is the Å to km conversion exact?
Yes. Both units are defined exactly, and 1 Å is exactly 1 × 10⁻¹³ km.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ångström (Å)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Angstroms to Kilometers. Retrieved October 17, 2026, from https://scientificconverters.com/length/angstroms-to-kilometers/
IEEE
Scientific Converters, "Convert Angstroms to Kilometers," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/length/angstroms-to-kilometers/