Blood Volume Calculator

Calculate your blood volume and total body water based on your height, weight, age, and gender using standard medical formulas.

Blood Volume & Body Water Calculator

About Blood Volume

Blood volume is the total amount of blood present in your circulatory system. It consists of two main components:

  • Plasma (about 55% of blood volume)
  • Red blood cells (about 45% of blood volume)

Total body water, on the other hand, makes up about:

  • 60% of total body weight in adult males
  • 50% of total body weight in adult females

This calculator uses two well-established formulas:

  • Nadler's formula (1962) for blood volume calculation
  • Watson's formula (1980) for total body water estimation

Note: These calculations provide estimates based on standard formulas. Individual values may vary based on factors such as fitness level, medical conditions, and other physiological variables.