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What are the normal blood sugar levels?

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Posted on Mon, 23 Feb 2015
Question: What is considered normal blood sugar both fasting and after meals?
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Answered by Dr. Ajish TP (23 minutes later)
Brief Answer:
Fasting sugar < 100 mg/dl, after food less than 140 mg/dl

Detailed Answer:
Hi,

Welcome to HCM. I had gone through your question and understand your concerns.

There are 3 situations regarding blood sugars - Normal, Pre-diabetes, Diabetes

Normal:

Fasting blood sugar : 70-99 mg/dl ( 3.9 - 5.6 mmol/L)
2hour after food : 80- 139 mg/dl ( 4.4 - 7.8 mmol/L )
HbA1c ( 3 months' average blood sugar) : less than 5.7%

Pre- diabetes (at risk of developing diabetes)

Fasting blood sugar : 100-125 mg/dl ( 5.6 - 6.9 mmol/L)
2hour after food : 140-199 mg/dl ( 7.8 - 11 mmol/L)
HbA1c : 5.7 - 6.4 %

Dibetes

Fasting blood sugar : 126 mg/dl (7 mmol/L) and above
2hour after food : 200 mg/dl ( 11 mmol/L) and above
HbA1c : 6.5 % and above


Hope I have answered your question. If you have any further questions I will be happy to help.


Regards
Dr Ajish TP
Consultant Endocrinologist
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Ajish TP

Endocrinologist

Practicing since :2002

Answered : 819 Questions

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What are the normal blood sugar levels?

Brief Answer: Fasting sugar < 100 mg/dl, after food less than 140 mg/dl Detailed Answer: Hi, Welcome to HCM. I had gone through your question and understand your concerns. There are 3 situations regarding blood sugars - Normal, Pre-diabetes, Diabetes Normal: Fasting blood sugar : 70-99 mg/dl ( 3.9 - 5.6 mmol/L) 2hour after food : 80- 139 mg/dl ( 4.4 - 7.8 mmol/L ) HbA1c ( 3 months' average blood sugar) : less than 5.7% Pre- diabetes (at risk of developing diabetes) Fasting blood sugar : 100-125 mg/dl ( 5.6 - 6.9 mmol/L) 2hour after food : 140-199 mg/dl ( 7.8 - 11 mmol/L) HbA1c : 5.7 - 6.4 % Dibetes Fasting blood sugar : 126 mg/dl (7 mmol/L) and above 2hour after food : 200 mg/dl ( 11 mmol/L) and above HbA1c : 6.5 % and above Hope I have answered your question. If you have any further questions I will be happy to help. Regards Dr Ajish TP Consultant Endocrinologist