Using this test, a fasting blood sugar level of 99 mg/dL or lower is considered normal, while 100 to 125 mg/dL indicates you have prediabetes, and 126 mg/dL or higher indicates you have diabetes.

Reviewed by Dietitian Emily Lachtrupp, M.S., RD Checking your blood sugar can feel like a major inconvenience—not to mention, if you’re using a finger-stick test, it can hurt, too.

Using this test, a fasting blood sugar level of 99 mg/dL or lower is considered normal, while 100 to 125 mg/dL indicates you have prediabetes, and 126 mg/dL or higher indicates you have diabetes.

Glucometer is a device to measure blood sugar using a small blood sample from a fingertip prick. It's a quick and easy method, but only provides a snapshot at the time of testing.