HbA1c Calculator : Equivalent Chart & Formula

We all have blood sugar levels, which can be high, low, or just right. A blood test at the hospital helps us check this.

The HbA1c test, also known as the glycated hemoglobin test, is important for diagnosing type 2 diabetes and keeping track of blood sugar levels if you already have diabetes.

That’s why we made an HbA1c calculator. It helps you find your average blood sugar in mg/dL and your HbA1c value in mmol/mol (IFCC format).

Practical Example

Assume a patient’s HbA1c is 7.0%. In this case, the patient’s HbA1c of 5.5%(DCCT/NGSP) corresponds to an average blood sugar of approximately 111.15 mg/dL and an HbA1c value of about 36.61 mmol/mol (IFCC). And it’s perfectly normal or no diabetics occurred in this patient.

What is HbA1c?

HbA1c is a blood test that gives you an overview of your average blood glucose levels over the past two to three months.

It measures how much glucose has been attached to hemoglobin, a protein in your red blood cells.

When you have high blood glucose levels, more glucose sticks to hemoglobin. By analyzing a sample of your blood in a lab, the test calculates the percentage of hemoglobin coated with glucose.

Your HbA1c level is reported as a percentage. A higher percentage means higher average blood glucose levels.

This percentage helps your doctor understand how well your blood sugar has been controlled over time.

Calculation Formula

To Convert HbA1c (%) to Average Blood Sugar (mg/dL) and HbA1c (%) to HbA1c (mmol/mol) formula we used :

Average Blood Sugar (mg/dL) = HbA1c (%) × 28.7 – 46.7

HbA1c (mmol/mol) = HbA1c (%) × 10.93 – 23.5

HbA1c Conversion Chart

Our HbA1c conversion chart helps to convert HbA1c values into average blood glucose levels and vice versa.

HbA1c (%)	Avg Blood Sugar (mg/dL)	HbA1c (mmol/mol)
4.4	79.58	24.59
4.5	82.45	25.69
4.6	85.32	26.78
4.7	88.19	27.87
4.8	91.06	28.96
4.9	93.93	30.06
5.0	96.80	31.15
5.1	99.67	32.24
5.2	102.54	33.34
5.3	105.41	34.43
5.4	108.28	35.52
5.5	111.15	36.62
5.6	114.02	37.71
5.7	116.89	38.80
5.8	119.76	39.90
5.9	122.63	41.00
6.0	125.50	42.09
6.1	128.37	43.18
6.2	131.24	44.28
6.3	134.11	45.37
6.4	137.00	46.47
6.5	139.87	47.56
6.6	142.74	48.65
6.7	145.61	49.75
6.8	148.48	50.84
6.9	151.35	51.93
7.0	154.22	53.03
7.1	157.09	54.12
7.2	159.96	55.22
7.3	162.83	56.31
7.4	165.70	57.40
7.5	168.57	58.50
7.6	171.44	59.59
7.7	174.31	60.68
7.8	177.18	61.78
7.9	180.05	62.87
8.0	182.92	63.96
8.1	185.79	65.06
8.2	188.66	66.15
8.3	191.53	67.24
8.4	194.40	68.34
8.5	197.27	69.43
8.6	200.14	70.52
8.7	203.01	71.62
8.8	205.88	72.71
8.9	208.75	73.80
9.0	211.62	74.90
9.1	214.49	76.00
9.2	217.36	77.09
9.3	220.23	78.18
9.4	223.10	79.28
9.5	225.97	80.37
9.6	228.84	81.46
9.7	231.71	82.56
9.8	234.58	83.65
9.9	237.45	84.74
10.0	240.32	85.84
10.1	243.19	86.93
10.2	246.06	88.02
10.3	248.93	89.12
10.4	251.80	90.21
10.5	254.67	91.30
10.6	257.54	92.40
10.7	260.41	93.49
10.8	263.28	94.58
10.9	266.15	95.68
11.0	269.02	96.77
11.1	271.89	97.86
11.2	274.76	98.96
11.3	277.63	100.05
11.4	280.50	101.15
11.5	283.37	102.24
11.6	286.24	103.33
11.7	289.11	104.43
11.8	291.98	105.52
11.9	294.85	106.61
12.0	297.72	107.71
12.1	300.59	108.80
12.2	303.46	109.89
12.3	306.33	110.99
12.4	309.20	112.08
12.5	312.07	113.17
12.6	314.94	114.27
12.7	317.81	115.36
12.8	320.68	116.46
12.9	323.55	117.55
13.0	326.42	118.65
13.1	329.27	119.68
13.2	332.14	120.78
13.3	335.01	121.87
13.4	337.88	122.96
13.5	340.75	124.06

Normal HbA1C Range for Diagnosis

A normal HbA1C level is typically below 5.7% or average blood sugar (166.89 mg/dL). The A1C test measures your average blood sugar levels over the past two to three months.

• Less than 5.7% or below 39 mmol/mol: Normal, no diabetes.
• 5.7% to 6.4% or 39-46 mmol/mol: Prediabetes.
• 6.5% or higher (48 mmol/mol or higher): Typically indicates Type 2 diabetes or, in some cases, Type 1 diabetes.

For adults with diabetes, the American Diabetes Association suggests aiming for an HbA1C of 7% or lower to manage the condition and reduce the risk of complications effectively.

High HbA1c levels indicate poor blood sugar control, which can lead to complications such as:

• Heart Disease
• Kidney Damage
• Nerve Damage
• Vision Problems

If you want to know more about improving your HbA1C and how it works, feel free to reach out to us. We’d be happy to help.

References:

1. American Diabetes Association [Internet]. Arlington (VA): American Diabetes Association; c1995–2022. Understanding A1C: A1C does it all; [ cited 2022 May 17]; [about 5 screens]. Available from: https://www.diabetes.org/diabetes/A1C
2. National Heart, Lung, and Blood Institute [Internet]. Bethesda (MD): U.S. Department of Health and Human Services; Blood Tests; [updated 2022 Mar 24; cited 2022 May 17]; [about 8 screens]. Available from: https://www.nhlbi.nih.gov/health-topics/blood-tests