Is losing 5oo cc of blood bad?

500 ccs of blood is equal to 1/2 of a liter. The average amount of blood in a normal healthy adult, depending on size, is 4-6 liters. In an adult of average health, the body does a pretty good job of replacing this amount of lost blood. Increasing fluids after blood loss can help. One may feel dizzy or lightheaded with this amount of blood loss and perhaps a little short of breath. Rest, fluids and a balanced diet should aid in your recovery