Is FT4 thyroid 1.57 normal, high or low? What does Free thyroxine level 1.57 mean?

📅 Medical Review Date: December 19, 2025

Your FT4 thyroid level of 1.57 is a Normal FT4 thyroid level.

Normal FT4 thyroid levels may indicate underlying health problems. The normal range is typically between 0.89 ng/dL and 1.76 ng/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 FT4 thyroid range for men is :0.89 - 1.76 ng/dL

Ideal values of FT4 thyroid depending on age (male) :

Age	Ideal FT4 thyroid value
<5 years	0.904
5-10 years	0.918
10-15 years	0.932
15-20 years	0.947
20-25 years	0.962
25-30 years	0.977
30-35 years	0.992
35-40 years	1.008
40-45 years	1.024
45-50 years	1.04
50-55 years	1.056
55-60 years	1.073
60-70 years	1.09
70-80 years	1.107
80-90 years	1.124
90-100 years	1.142
>100 years	1.16

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

Get Advice via Email : Send us your blood test report, and our FT4 thyroid 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 FT4 thyroid, 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 normal FT4 thyroid level

If you want your blood test report to be interpreted by FT4 thyroid specialist, you can upload your report. Our FT4 thyroid 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 FT4 thyroid levels include:

• Autoimmune disease
• A non-functioning thyroid gland
• Thyroiditis
• Diabetes
• Liver disease

Receive world-class medical opinion about your normal FT4 thyroid levels over email.Upload blood test report now

Normal range of FT4 thyroid found among women :0.89-1.76 ng/dL

Ideal values of FT4 thyroid depending on age (female) :

Age	Ideal FT4 thyroid value
<5 years	0.904
5-10 years	0.919
10-15 years	0.934
15-20 years	0.949
20-25 years	0.964
25-30 years	0.98
30-35 years	0.996
35-40 years	1.012
40-45 years	1.028
45-50 years	1.045
50-55 years	1.062
55-60 years	1.079
60-70 years	1.096
70-80 years	1.114
80-90 years	1.132
90-100 years	1.15
>100 years	1.169

If you take a FT4 thyroid blood test and the results are not in the normal range (0.89-1.76 ng/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.

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

• Hebballi, Dharwada
• Independence, Barbour County, West Virginia
• Lasson, Calvados
• Hole, India
• K.chettypatti
• Krasnoperekopsk
• Kuzhimattom
• Lagny-sur-Marne
• La Porte-du-Der
• Gobardanga
• Giriviller
• Govindpur (community development block)
• Health District (Miami)
• Givrycourt
• L'Hôpital-le-Grand
• Laréole
• Lessac
• Koreiz
• Kunayavalasa
• Khejuri (Vidhan Sabha constituency)
• Joppécourt
• Houdetot
• Le Port-Marly
• Jullié
• Kondapi
• Kapshi
• Léguillac-de-Cercles
• Griscourt
• Guigny
• Haibatpur, Sultanpur Lodhi
• Hazara, Punjab
• Keeseekoowenin Ojibway First Nation
• Kishan Singhwala
• Halligeri
• Hingna
• Joussé
• Italy at the Hopman Cup
• Heftziba
• Latin Empire
• Jordanów
• Les Corvées-les-Yys
• Gau Lower Silesia
• Lamorlaye
• Jhorhat
• Grand-Santi
• Jasol
• Germondans
• Leboulin
• History of Limerick
• Jemari (J.K. Nagar Township)
• La Flachère
• Liancourt-Saint-Pierre
• Irma, Lombardy
• Itikial
• Khejdadeo
• Héricourt-en-Caux
• Kondapur, Medak
• Kolukkumalai
• Lampaul-Guimiliau
• Gustavia, Saint Barthélemy
• Kummanayakanakoppa
• Gratosoglio
• Kukurha
• La Trinité-Porhoët
• La Bachellerie
• Genivolta
• Lélex
• Heiligenstein
• Kobayashi, Miyazaki
• Isla Encantada
• Leynes
• Gréolières
• Kalbetta Forest Junction
• Kunal, Haryana
• Gençay
• Khurchani
• Kachurwahi
• Hadji Mohammad Ajul, Basilan
• Jim Crow laws
• Le Barroux
• Inder Puri
• Le Bouchet-Mont-Charvin
• Huishan District
• La Chaussaire
• Hidakagawa, Wakayama
• Kasara, Dahanu
• Hoodwink Island
• Jagatdal (Vidhan Sabha constituency)
• Le Chay
• Gaura Bauram (Vidhan Sabha constituency)
• Hattigudur
• Gangangaon
• La Brée-les-Bains
• Ghuraba
• Goramansingh
• Isle of Man
• Lagarde-sur-le-Né
• Lanteuil
• Le Theil-en-Auge
• Hanshan District
• L. B. Nagar
• Kariamangalam
• Hidden Hills, California
• Kalpati
• Kenilworth, Illinois
• Jarny
• Hongqiao Subdistrict, Guangzhou
• Gênes
• La Tourette
• Janus Island
• Le Châtelet-sur-Sormonne
• Lapeyrouse-Mornay
• Konidena
• Hoste, Moselle
• Kudur
• Kolar
• Gujan-Mestras
• Kusur (village)
• La Ferté-Loupière
• La Villeneuve-sous-Thury
• Khargram (community development block)
• Gandajika Territory
• Holmestrand
• Jalda
• Kandanissery
• L'Hôpital-du-Grosbois
• Kionga Triangle
• Laguenne
• Leland Stanford Mansion State Historic Park
• Kanagi, Aomori
• Greater Amman Municipality
• Jadhvawadi
• Inflanty Voivodeship
• Langeac
• Goulles
• Huqiu District
• Keleswaram Mahadeva Temple
• Kangeyam
• Gray-la-Ville
• Les Marêts
• Herbignac
• Lavaldens
• Lavoûte-sur-Loire
• Kangeyam
• Heungin-dong
• Les Moutiers-en-Retz
• La Perrière, Orne
• Housset
• Le Vicel
• Kaizu

How the FT4 thyroid Test Is Done :

When your doctor orders a FT4 thyroid test, it involves a straightforward blood draw to measure your FT4 thyroid levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your FT4 thyroid test results are usually available within a few hours.

Medical References

• MedlinePlus – Thyroxine (T4) Test
• Cleveland Clinic – T4 (Thyroxine) Test: What It Is, Function, Purpose & Levels
• MedlinePlus – Free T4 test
• WebMD – What Is a Thyroxine (T4) Blood Test?
• Mayo Clinic – Hypothyroidism (underactive thyroid) - Diagnosis and treatment