RDW (Red Cell Distribution Width)
RDW measures the degree of variation in red blood cell volume and size across the sample.
Test your personal value
Enter the number from your lab report to instantly see how it compares to reference ranges.
Physiological Reference Ranges
The ranges below represent standard adult physiological values. Your laboratory's printed reference range always takes precedence.
11.5 – 14.5 %
11.5 – 14.5 %
11.5 – 14.5 %
What does a low result mean?
A low value has no adverse clinical meaning and simply reflects uniform cell sizes.
What does a high result mean?
Increased variability often appears during active blood cell renewal or when beginning nutritional therapy.
Questions ready for your doctor
Bring these questions to your next consultation to discuss with your healthcare practitioner:
- Does this variability reflect healthy bone marrow renewal?
- Are my underlying nutritional stores adequate?
- Is a follow-up assessment suggested in a few months?
Do you have a full blood test report?
Upload your lab document (PDF or image) to get an instant, clear explanation for every biomarker at once.
Important information — Medical notice
ScanMyLab is for informational purposes only. It does not provide a diagnosis and never replaces the advice of your doctor or laboratory.