Bread Unit Calculator
A bread unit is a 15 gram carbohydrate portion used in carb counting. Convert grams to units and see approximate energy.
Result
Enter the values and press Calculate. Numbers outside the allowed range produce no result.
How is it calculated?
One thin slice of bread is about 1 unit when it has 15 g of carbohydrate. Rice, fruit and milk use the same grams; the portion weights differ.
Exchanges = carbohydrate (g) ÷ 15
Reference table
| Carbohydrate | Units |
|---|---|
| 15 g | 1 |
| 30 g | 2 |
| 45 g | 3 |
| 60 g | 4 |
How should you read the result?
Insulin-to-carb ratio, sensitivity and correction doses are personal and are not calculated here. Do not change treatment from this number.
Frequently asked questions
How many grams is 1 bread unit?
15 grams of carbohydrate.
How many calories is 1 unit?
The carbohydrate alone is 15 × 4 = 60 kcal. Bread's protein and fat add more.
Do I subtract fiber?
Some methods subtract all or half of the fiber. This tool divides the carbohydrate grams you enter by 15.
Does it find an insulin dose?
No. Dose depends on the personal ratio given by your clinician.