Enter the current intake (mg/day) and the recommended intake (mg/day) into the Calculator. The calculator will evaluate the Rdi Percentage. 

Rdi Percentage Formula

RDIp  = CI / RI * 100


  • RDIp is the Rdi Percentage (%)
  • CI is the current intake (mg/day)
  • RI is the recommended intake (mg/day)

To calculate Rdi Percentage, divide the current intake by the recommended intake amount, then multiply by 100.

How to Calculate Rdi Percentage?

The following steps outline how to calculate the Rdi Percentage.

  1. First, determine the current intake (mg/day). 
  2. Next, determine the recommended intake (mg/day). 
  3. Next, gather the formula from above = RDIp = CI / RI * 100.
  4. Finally, calculate the Rdi Percentage.
  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.

current intake (mg/day) = 40

recommended intake (mg/day) = 134