Enter the milligrams of calcium intake per kilogram of body weight and the weight of the individual into the calculator to determine the daily calcium intake. This calculator can also evaluate any of the variables given the others are known.

Calcium Intake Formula

The following formula is used to calculate the daily calcium intake.

CI = (MCI * W) / 1000

Variables:

  • CI is the daily calcium intake (mg)
  • MCI is the milligrams of calcium intake per kilogram of body weight (mg/kg)
  • W is the weight of the individual (kg)

To calculate the daily calcium intake, multiply the milligrams of calcium intake per kilogram of body weight by the weight of the individual. Then, divide the result by 1000 to convert the result from milligrams to grams.

What is a Calcium Intake?

Calcium intake refers to the amount of calcium a person consumes through their diet or supplements. Calcium is a vital mineral for the body, necessary for the development and maintenance of strong bones and teeth, as well as for the proper functioning of the heart, muscles, and nerves. It is found in various foods like dairy products, green leafy vegetables, and fish with edible bones, or can be taken as a dietary supplement. The recommended daily intake varies depending on age, sex, and life stage.

How to Calculate Calcium Intake?

The following steps outline how to calculate the Calcium Intake (CI).


  1. First, determine the milligrams of calcium intake per kilogram of body weight (MCI).
  2. Next, determine the weight of the individual (W) in kilograms.
  3. Next, gather the formula from above = CI = (MCI * W) / 1000.
  4. Finally, calculate the Calcium Intake (CI).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

milligrams of calcium intake per kilogram of body weight (MCI) = 120

weight of the individual (W) = 65