Enter the actual Blood Glucose level and the desired Blood Glucose level into the calculator to determine the Glucose Infusion Rate; this calculator can also evaluate any of the variables given the others are known.

Glucose Infusion Rate Formula

The following formula is used to calculate the Glucose Infusion Rate (GIR):

GIR = (BG - Target) / CF


  • GIR is the Glucose Infusion Rate
  • BG is the Blood Glucose level
  • Target is the desired Blood Glucose level
  • CF is the Correction Factor

To calculate the Glucose Infusion Rate, subtract the desired Blood Glucose level from the actual Blood Glucose level. Then, divide the result by the Correction Factor.

What is a Glucose Infusion Rate?

The Glucose Infusion Rate (GIR) is a medical term that refers to the rate at which glucose is administered intravenously to a patient. This is often used in critical care settings or during certain medical tests to either provide the body with necessary glucose or to measure the body’s insulin response. The rate is typically measured in milligrams per kilogram of body weight per minute (mg/kg/min). The exact rate can vary depending on the patient’s condition, age, weight, and other factors. For instance, in a glucose tolerance test, a standard GIR might be used to assess how quickly the patient’s body metabolizes glucose. In a critical care setting, the GIR might be adjusted based on the patient’s blood glucose levels, nutritional needs, or other factors.

How to Calculate Glucose Infusion Rate?

The following steps outline how to calculate the Glucose Infusion Rate (GIR).

  1. First, determine the patient’s weight (kg).
  2. Next, determine the desired glucose concentration (mg/dL).
  3. Next, determine the current glucose concentration (mg/dL).
  4. Next, determine the infusion time (hours).
  5. Next, gather the formula from above = GIR = (desired glucose concentration – current glucose concentration) * weight / infusion time.
  6. Finally, calculate the Glucose Infusion Rate.
  7. 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.

Weight (kg) = 70

Desired glucose concentration (mg/dL) = 100

Current glucose concentration (mg/dL) = 80

Infusion time (hours) = 4