A kilometer (km) is a unit of distance, while grams (g) are a unit of mass. These two units measure different things and therefore cannot be directly converted. To convert between them, you would need additional information, such as the material or object you are measuring (e.g., the mass of a specific amount of a substance per kilometer).
If you’re referring to something like the mass of a rope or cable that extends 1 kilometer in length, you’d need to know the material’s density or mass per unit length. For example, if a rope weighs 10 grams per meter, then a kilometer (1,000 meters) would weigh 10,000 grams or 10 kilograms.
