Is Phosphorus 1.8 low, normal or dangerous? What does Phosphorus level 1.8 mean?

📅 Medical Review Date: September 29, 2025

Your Phosphorus level of 1.8 is a Low Phosphorus level.

Low Phosphorus levels may indicate underlying health problems. The normal range is typically between 2.5 mg/dL and 4.5 mg/dL. 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 Phosphorus range for men is :2.5 - 4.5 mg/dL

Ideal values of Phosphorus depending on age (male) :

Age	Ideal Phosphorus value
<5 years	2.545
5-10 years	2.591
10-15 years	2.638
15-20 years	2.685
20-25 years	2.733
25-30 years	2.782
30-35 years	2.832
35-40 years	2.883
40-45 years	2.935
45-50 years	2.988
50-55 years	3.042
55-60 years	3.097
60-70 years	3.153
70-80 years	3.21
80-90 years	3.268
90-100 years	3.327
>100 years	3.387

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

Get Advice via Email : Send us your blood test report, and our Phosphorus 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 Phosphorus, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

1,51,150

Total number of patients treated

A video message on the treatment of your low Phosphorus level

If you want your blood test report to be interpreted by Phosphorus specialist, you can upload your report. Our Phosphorus expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours.Upload blood test report now

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

• Increased blood calcium
• Diabetic ketoacidosis (after treatment)
• Liver disease
• Rickets and osteomalacia (due to vitamin D deficiencies)
• Kidney failure

Receive world-class medical opinion about your low Phosphorus levels over email.Upload blood test report now

Normal range of Phosphorus found among women :2.5-4.5 mg/dL

Ideal values of Phosphorus depending on age (female) :

Age	Ideal Phosphorus value
<5 years	2.546
5-10 years	2.593
10-15 years	2.641
15-20 years	2.69
20-25 years	2.74
25-30 years	2.791
30-35 years	2.843
35-40 years	2.896
40-45 years	2.95
45-50 years	3.005
50-55 years	3.061
55-60 years	3.118
60-70 years	3.176
70-80 years	3.235
80-90 years	3.295
90-100 years	3.356
>100 years	3.418

If you take a Phosphorus blood test and the results are not in the normal range (2.5-4.5 mg/dL), 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 Phosphorus Test Is Done :

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