Kilometer to Nanometer Converter
Length · unit-converter
Convert Kilometer to Nanometer with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Kilometer (km)
To: Nanometer (nm)
About Kilometer
The kilometer is an SI unit equal to 1,000 meters. It is the standard unit for longer distances in most countries that use the metric system.
About Nanometer
The nanometer is one billionth of a meter. It describes wavelengths of light, semiconductor features, and molecular scales.
How to convert kilometers to nanometers
1 kilometer is equal to 1.00000000e+12 nanometer:
1 km = (1000 m ÷ 1e-9 m) nm = 1.00000000e+12 nm
Each kilometer is defined as 1000 m and each nanometer as 1e-9 m, so one km equals 1000 ÷ 1e-9 nm = 1.00000000e+12 nm.
Let d(km) be the numeric value of the same length measured in Kilometer (km), and d(nm) the value in Nanometer (nm). Then:
d(nm) = d(km) × (1000 / 1e-9)
Equivalently, divide by how many km fit into one nm (meters per nm divided by meters per km):
d(nm) = d(km) ÷ 1.00000000e-12
Or: nanometer = kilometer ÷ 1.00000000e-12
Examples
Example #1: Convert 20 km to nanometer
20 km = 20 km × (1000/1e-9) nm = 20000000000000 nm
20 km = 20 km ÷ 1.00000000e-12 = 20000000000000 nm
Example #2: Convert 50 km to nanometer
50 km = 50 km × (1000/1e-9) nm = 50000000000000 nm
50 km = 50 km ÷ 1.00000000e-12 = 50000000000000 nm
Summary
To convert Kilometer to Nanometer, multiply the value in km by the ratio of meters per km divided by meters per nm. Equivalently: value_nm = value_km × (1000 / 1e-9). Numerically, 1 km equals 999999999999.9999 nm.
Relationship context
Both units are metric (SI) and tied to the meter. Converting between them uses powers of ten (or simple rational factors), so the relationship is exact in decimal arithmetic. The factor from Kilometer to Nanometer is 1.000000e+12 (1 km = 999999999999.9999 nm).
Conversion tables
| Kilometer (km) | Nanometer (nm) |
|---|---|
| 0.1 | 100,000,000,000 |
| 1 | 1,000,000,000,000 |
| 2 | 2,000,000,000,000 |
| 3 | 3,000,000,000,000 |
| 4 | 4,000,000,000,000 |
| 5 | 5,000,000,000,000 |
| 6 | 6,000,000,000,000 |
| 7 | 7,000,000,000,000 |
| 8 | 8,000,000,000,000 |
| 9 | 9,000,000,000,000 |
| Kilometer (km) | Nanometer (nm) |
|---|---|
| 10 | 10,000,000,000,000 |
| 20 | 20,000,000,000,000 |
| 30 | 30,000,000,000,000 |
| 40 | 40,000,000,000,000 |
| 50 | 50,000,000,000,000 |
| 60 | 60,000,000,000,000 |
| 70 | 70,000,000,000,000 |
| 80 | 80,000,000,000,000 |
| 90 | 90,000,000,000,000 |
| 100 | 100,000,000,000,000 |