Aug 01, 2014· How to Calculate Your A1c August 1, 2014 by Jonathan. Check your A1C at home on your own with the A1C Now+ MultiTest Blood Glucose Monitor. The Hemoglobin A1c (HbA1c or simply A1c for short) test is a blood test used to measure the average blood glucose concentration in your body in the past 13 months. For diabetics, this is the standard way ...