Is RDW SD 37.4 low, normal or dangerous? What does RDW SD level 37.4 mean?

📅 Medical Review Date: November 19, 2025

Your RDW SD level of 37.4 is a Low RDW SD level.

Low RDW SD levels may indicate underlying health problems. The normal range is typically between 39 fL and 46 fL. 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 RDW SD range for men is :39 - 46 fL

Ideal values of RDW SD depending on age (male) :

Age	Ideal RDW SD value
<5 years	40.459
5-10 years	41.972
10-15 years	43.542
15-20 years	45.17
20-25 years	45.106
25-30 years	45.043
30-35 years	44.98
35-40 years	44.917
40-45 years	44.854
45-50 years	44.792
50-55 years	44.729
55-60 years	44.667
60-70 years	44.605
70-80 years	44.542
80-90 years	44.48
90-100 years	44.418
>100 years	44.356

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

Get Advice via Email : Send us your blood test report, and our RDW SD 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 RDW SD, 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 RDW SD level

If you want your blood test report to be interpreted by RDW SD specialist, you can upload your report. Our RDW SD 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 RDW SD levels include:

• Thalassemia, an inherited blood disorder
• Crohn's disease
• Chronic liver disease
• An iron or vitamin deficiency
• Heart disease

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

Normal range of RDW SD found among women :39-46 fL

Ideal values of RDW SD depending on age (female) :

Age	Ideal RDW SD value
<5 years	40.502
5-10 years	42.062
10-15 years	43.682
15-20 years	45.365
20-25 years	45.298
25-30 years	45.231
30-35 years	45.164
35-40 years	45.097
40-45 years	45.03
45-50 years	44.964
50-55 years	44.897
55-60 years	44.831
60-70 years	44.764
70-80 years	44.697
80-90 years	44.631
90-100 years	44.565
>100 years	44.499

If you take a RDW SD blood test and the results are not in the normal range (39-46 fL), 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.

This page was viewed the most from these cities in the last 30 days:

• Jinlongshan
• Gurrampode
• Geography of Mizoram
• Kolambugan, Lanao del Norte
• Jifna
• Guduguntla Palem
• La Coulée, les Saintes
• La Neuville-Saint-Pierre
• Kurumbur
• Geva Carmel
• Lda City
• Lalizolle
• Kempatti
• Le Poiré-sur-Vie
• Germéfontaine
• Lariyar
• Le Petit-Abergement
• Lake Balboa, Los Angeles
• Kurinjipadi
• Kalwas
• Giscos
• Lassy, Val-d'Oise
• La Bretenière, Jura
• Lakhenpur
• İğciler, Polatlı
• Kapoli (K.G.)
• Huisseau-en-Beauce
• Kishanganj (Vidhan Sabha constituency)
• Le Tanu
• Kampli
• Guesnain
• Karnal
• Lanthes
• Kharsundi
• Kandola, Punjab
• Hadol
• Kiryandongo Refugee Settlement
• Kaliro District
• La Loyère
• Les Baux-de-Provence
• Lalbenque
• Lazzaretto Vecchio
• Hoodwink Island
• Lehighton, Pennsylvania
• Kotido District
• Gangnan District
• Heftziba
• Lagonglong, Misamis Oriental
• Gignod
• Hauville
• Humansville, Missouri
• Lesneven
• Kauffenheim
• Koloriang
• Gillock Island
• Gy-les-Nonains
• Hampden (CDP), Maine
• Kring Islands
• Kawadas
• Kyōtanabe, Kyoto
• Kondazhy
• Hœrdt
• Jhanji
• Kheri (Ludhiana West)
• Johnstongunj
• Le Verguier
• Japanese occupation of the Dutch East Indies
• La Répara-Auriples
• Kami, Kōchi
• Genouilly, Cher
• Lakkundi
• Joginder Nagar, Great Nicobar
• La Ferrière-de-Flée
• Grèzes, Haute-Loire
• Jalamadul
• Kovvur mandal
• Idikarai
• Lézignan, Hautes-Pyrénées
• La Meurdraquière
• Jakhrana
• Jaman District
• Herodian Tetrarchy
• Gouy, Aisne
• Lamai
• Guargualé
• Georgia City, Missouri
• Kashipur-Belgachhia (Vidhan Sabha constituency)
• Kalhausen
• Guayaquil Canton
• La Mazière-aux-Bons-Hommes
• Kular
• Lalganj Ajhara
• Heining-lès-Bouzonville
• Juvigny-sur-Orne
• Hole, Norway
• Kumul Khanate
• Kanian Kalan
• Kumarapuram
• Kœstlach
• La Bastide-de-Bousignac
• La Malmaison
• Gurramguda
• Lamouilly
• Khanagaon
• La Chapelle-du-Noyer
• Gokal Pur
• Laur, Nueva Ecija
• Kaprassery
• Jagoti
• Jagatpur, India
• Junnarpada
• La Chevrolière
• Kolthige
• Le Mesnil-Jourdain
• Lamon
• Khoshut Khanate
• Jharsa
• Knowledge City
• Hatod
• Lazio
• Kutztown, Pennsylvania
• Kulathur, Pudukkottai
• Gençay
• Gosain Gaon
• Jiangning District
• Keelakudiyiruppu
• Janakavaram Panguluru
• Hachan
• Lázaro Cárdenas, Michoacán
• Greenwich Island
• Le Fouilloux
• Kingdom of Singapura
• Gurrajupeta
• Happiness
• Labro
• Le Fay-Saint-Quentin
• Ganaur
• Homedahl, Minnesota
• Kirloskarwadi
• Gaujac, Lot-et-Garonne
• Krishnarajapura
• Handaraki
• Ille-et-Vilaine
• Kolebira block
• Kelso, Washington
• Hoonah, Alaska
• Irsina
• Grandvillers-aux-Bois
• La Flèche
• Hwigyeong-dong

How the RDW SD Test Is Done :

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

Medical References

• MedlinePlus – RDW (Red Cell Distribution Width)
• Cleveland Clinic – RDW Blood Test: What It Is, Procedure & Results
• NIH – RDW-SD is Superior to RDW-CV in Reflecting Liver Fibrosis Stage in Patients with Chronic Hepatitis B

RDW SD treatment - Click to read 10 GOLDEN ARTICLES on Anemia