Blood Glucose Meter A blood glucose meter is a small, portable machine that's used to measure how much glucose (a type of sugar) is in the blood (also known as the blood glucose level). People with diabetes often use a blood glucose meter to help them manage their condition. Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.