Enter the total calcium (mg/dL) and the total creatinine level (mg/dL) into the Calculator. The calculator will evaluate the Ca/Cr Ratio. 

Ca/Cr Ratio Formula

Ca:Cr = Ca/Cr


  • Ca:Cr is the Ca/Cr Ratio ()
  • Ca is the total calcium (mg/dL)
  • Cr is the total creatinine level (mg/dL)

To calculate Ca/Cr Ratio, divide the total calcium by the total creatinine.

How to Calculate Ca/Cr Ratio?

The following steps outline how to calculate the Ca/Cr Ratio.

  1. First, determine the total calcium (mg/dL). 
  2. Next, determine the total creatinine level (mg/dL). 
  3. Next, gather the formula from above = Ca:Cr = Ca/Cr.
  4. Finally, calculate the Ca/Cr Ratio.
  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.

total calcium (mg/dL) = 5

total creatinine level (mg/dL) = 6