Is INR 1 normal, high or low? What does INR level 1 mean?

📅 Medical Review Date: June 9, 2026

Your INR level of 1 is a Normal INR level.

Normal INR levels may indicate underlying health problems. The normal range is typically between 0.9 ratio and 1.2 ratio. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal INR range for men is :0.9 - 1.2 ratio

Ideal values of INR depending on age (male) :

Age	Ideal INR value
<5 years	0.909
5-10 years	0.918
10-15 years	0.927
15-20 years	0.936
20-25 years	0.945
25-30 years	0.954
30-35 years	0.964
35-40 years	0.974
40-45 years	0.984
45-50 years	0.994
50-55 years	1.004
55-60 years	1.014
60-70 years	1.024
70-80 years	1.034
80-90 years	1.044
90-100 years	1.054
>100 years	1.065

*Ideal values are calculated based on our database of patient records

Get Advice via Email : Send us your blood test report, and our INR experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides INR, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

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Some examples of conditions that increase or decrease INR levels include:

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Autoantibody against a specific factor (e.g., factor VIII)

Normal range of INR found among women :0.9-1.2 ratio

Ideal values of INR depending on age (female) :

Age	Ideal INR value
<5 years	0.909
5-10 years	0.918
10-15 years	0.927
15-20 years	0.937
20-25 years	0.947
25-30 years	0.957
30-35 years	0.967
35-40 years	0.977
40-45 years	0.987
45-50 years	0.997
50-55 years	1.007
55-60 years	1.017
60-70 years	1.027
70-80 years	1.038
80-90 years	1.049
90-100 years	1.06
>100 years	1.071

If you take a INR blood test and the results are not in the normal range (0.9-1.2 ratio), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the INR Test Is Done :

When your doctor orders a INR test, it involves a straightforward blood draw to measure your INR levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your INR test results are usually available within a few hours.

Medical References

• MedlinePlus – Prothrombin Time Test and INR (PT/INR)
• Mayo Clinic – Prothrombin time test
• Cleveland Clinic – Prothrombin Time (PT/INR) Test