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Testosterone converter

Convert a total testosterone between ng/dL and nmol/L, with the whole chart below.

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Testosterone in nmol/LExample

15.6nmol/L

In ng/dL
450 ng/dL
In nmol/L
15.6 nmol/L
See the workingnmol/L = ng/dL ÷ 28.84450 ÷ 28.84 = 15.60 nmol/L

The AUA uses about 300 ng/dL (10.4 nmol/L) as the cutoff for low testosterone in men, on two early-morning tests.

Two units, one test

US labs print testosterone in ng/dL; most other countries use nmol/L. Divide ng/dL by 28.84 to get nmol/L, and multiply to go back.

The cutoff guidelines use

The American Urological Association uses a total testosterone under about 300 ng/dL (10.4 nmol/L), on two separate early-morning tests, together with symptoms, as its line for low testosterone in men. Ranges for women are far lower and are usually reported the same way.

Testosterone chart: ng/dL to nmol/L

Total testosterone from 10 to 1,500 ng/dL (divide by 28.84).

ng/dLnmol/L
100.3
200.7
301.0
401.4
501.7
602.1
702.4
802.8
903.1
1003.5
1103.8
1204.2
1304.5
1404.9
1505.2
1605.5
1705.9
1806.2
1906.6
2006.9
2107.3
2207.6
2308.0
2408.3
2508.7
2609.0
2709.4
2809.7
29010.1
30010.4
31010.7
32011.1
33011.4
34011.8
35012.1
36012.5
37012.8
38013.2
39013.5
40013.9
41014.2
42014.6
43014.9
44015.3
45015.6
46016.0
47016.3
48016.6
49017.0
50017.3
51017.7
52018.0
53018.4
54018.7
55019.1
56019.4
57019.8
58020.1
59020.5
60020.8
61021.2
62021.5
63021.8
64022.2
65022.5
66022.9
67023.2
68023.6
69023.9
70024.3
71024.6
72025.0
73025.3
74025.7
75026.0
76026.4
77026.7
78027.0
79027.4
80027.7
81028.1
82028.4
83028.8
84029.1
85029.5
86029.8
87030.2
88030.5
89030.9
90031.2
91031.6
92031.9
93032.2
94032.6
95032.9
96033.3
97033.6
98034.0
99034.3
100034.7
101035.0
102035.4
103035.7
104036.1
105036.4
106036.8
107037.1
108037.4
109037.8
110038.1
111038.5
112038.8
113039.2
114039.5
115039.9
116040.2
117040.6
118040.9
119041.3
120041.6
121042.0
122042.3
123042.6
124043.0
125043.3
126043.7
127044.0
128044.4
129044.7
130045.1
131045.4
132045.8
133046.1
134046.5
135046.8
136047.2
137047.5
138047.9
139048.2
140048.5
141048.9
142049.2
143049.6
144049.9
145050.3
146050.6
147051.0
148051.3
149051.7
150052.0

Questions

How do I convert ng/dL to nmol/L?

Divide by 28.84. 300 ng/dL is about 10.4 nmol/L.

How do I convert nmol/L to ng/dL?

Multiply by 28.84. 15 nmol/L is about 433 ng/dL.

Does free testosterone convert the same way?

No. Free testosterone is reported in pg/mL or pmol/L; the free testosterone calculator handles it.

Sources

  1. Mulhall JP et al. Evaluation and management of testosterone deficiency: AUA guideline. Journal of Urology, 2018.
  2. Young DS. Implementation of SI units for clinical laboratory data. Annals of Internal Medicine, 1987.

Written by LifeFrom from the sources above, and not yet reviewed by a clinician. An estimate for your own understanding: it doesn't diagnose or treat anything, and it doesn't replace your doctor.

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