Enter the carbohydrates and ratio into the calculator to determine the required insulin dose. This calculator can also calculate the carb-to-insulin ratio or the total carbohydrates based on a known insulin dose.

Carb To Insulin Ratio Calculator

Enter any 2 values to calculate the missing variable




Related Calculators

Carb To Insulin Ratio Formula

The following formula is used to calculate the insulin dose (I) in units based on the carbohydrates (C) in grams and the carb-to-insulin ratio (R) in grams per unit.

I = C / R

Variables:

  • I is the insulin dose in units (U)
  • C is the amount of carbohydrates in grams (g)
  • R is the carb-to-insulin ratio (grams per unit)

To calculate the insulin dose, divide the amount of carbohydrates by the carb-to-insulin ratio.

What is Carb To Insulin Ratio?

The carb-to-insulin ratio is a personalized measure used by people with diabetes to determine how many grams of carbohydrates are covered by one unit of insulin. It helps in dosing insulin accurately to manage blood glucose levels after meals.

How to Calculate Carb To Insulin Ratio?

The following steps outline how to use the calculator and formula to determine the carb-to-insulin ratio or insulin dose.

  1. Determine the amount of carbohydrates (C) in grams you plan to consume.
  2. If calculating insulin dose, use your known carb-to-insulin ratio (R).
  3. Insert the variables into the formula I = C / R to find the insulin dose in units.
  4. If calculating the ratio, use known insulin dose (I) and carbohydrates (C) and solve R = C / I.
  5. If calculating carbohydrates, use known insulin dose (I) and ratio (R) and solve C = I × R.

Example Problem:

Use the following variables as an example to test your calculation:

Carbohydrates (C) = 60 g

Carb-to-insulin ratio (R) = 15 g per unit

Insulin dose (I) = C / R = 60 / 15 = 4 units