How many grams are there in one kilogram?

In the metric system, one kilogram is defined as being equivalent to 1000 grams. This relationship is fundamental in measurements and conversions within the metric system, which is based on powers of ten. Hence, when converting kilograms to grams, you multiply the number of kilograms by 1000.

For instance, if you have 1 kilogram and convert it to grams, you would perform the calculation: 1 kg × 1000 g/kg = 1000 grams. This direct conversion makes it clear and straightforward.

The other options, such as 500 grams, 1500 grams, and 2000 grams, do not reflect this established conversion factor and therefore do not represent the correct measurement of grams in a kilogram. Understanding this metric conversion is essential for accurately working with weight and measurements in various contexts, including drinking water treatment operations.