The amount of chicken stock you can make with half a chicken will depend on the size of the chicken and the specific recipe you follow. However, as a general guideline, here's an estimate:
Assuming you have a whole chicken weighing approximately 4 to 5 pounds (1.8 to 2.3 kilograms), half a chicken would be around 2 to 2.5 pounds (0.9 to 1.1 kilograms).
To make chicken stock, you typically use the bones, skin, and sometimes the giblets of the chicken, along with vegetables and herbs. The general rule of thumb is to use about 2 pounds of chicken parts (bones, skin, etc.) per 1 gallon (16 cups or 3.8 liters) of water.
So, with half a chicken (around 2 to 2.5 pounds), you would ideally use about 1 gallon of water to make chicken stock. This amount of stock should be sufficient for various recipes, and any extra can be stored in the refrigerator or frozen for future use.
Keep in mind that these measurements are approximate, and the actual amount of chicken stock you end up with may vary based on the specific ingredients and cooking process you use. Adjust the recipe as needed to suit your preferences and the size of the chicken you have.