SomaSoma
  1. Soma
  2. Lab unit converter
  3. Free T3

Free T3: pg/mL to pmol/L

US labs print free T3 in pg/mL, most European labs in pmol/L. To convert, multiply pg/mL by 1.5362; to go back, divide pmol/L by 1.5362.

pg/mL
Same value in4.61pmol/L

pmol/L = pg/mL × 1.5362 · molar mass 650.97 g/mol

This converter changes units only. It doesn’t tell you whether a number is in or out of any range: that depends on the range printed by your own lab, and on your doctor. Soma does not diagnose and is not medical advice.

The formula

pg/mL → pmol/L
pmol/L = pg/mL × 1.5362
pmol/L → pg/mL
pg/mL = pmol/L ÷ 1.5362
Where 1.5362 comes from
pg/mL counts the weight of free T3 in a volume of blood, pmol/L the number of molecules. One mole of liothyronine, T3 weighs 650.97 g; with that and the difference in volume, one pmol/L is 0.65097 pg/mL.

What the values mean

Typical ranges as the MedlinePlus Medical Encyclopedia gives them, in both units. They are for orientation only: your lab may use other ranges, and a result is read against the range printed on its own report.

Grouppg/mLpmol/L
Free T32.1–4.43.23–6.76

MedlinePlus gives free T3 in pg/dL: 210–440 pg/dL, which is 2.1–4.4 pg/mL.

Source: T3 (triiodothyronine) test, MedlinePlus Medical Encyclopedia (U.S. National Library of Medicine), “Normal Results”. The second unit is converted here and rounded.

Common values, converted

Straight conversions, rounded. The table doesn’t mark any value as normal or not; your lab’s report gives its own range.

pg/mLpmol/L
1.5 pg/mL2.3 pmol/L
2 pg/mL3.07 pmol/L
2.5 pg/mL3.84 pmol/L
3 pg/mL4.61 pmol/L
3.5 pg/mL5.38 pmol/L
4 pg/mL6.14 pmol/L
4.5 pg/mL6.91 pmol/L
5 pg/mL7.68 pmol/L
5.5 pg/mL8.45 pmol/L
pmol/Lpg/mL
2.5 pmol/L1.63 pg/mL
3 pmol/L1.95 pg/mL
3.5 pmol/L2.28 pg/mL
4 pmol/L2.6 pg/mL
4.5 pmol/L2.93 pg/mL
5 pmol/L3.25 pg/mL
5.5 pmol/L3.58 pg/mL
6 pmol/L3.91 pg/mL
6.5 pmol/L4.23 pg/mL
7 pmol/L4.56 pg/mL
7.5 pmol/L4.88 pg/mL
8 pmol/L5.21 pg/mL
Show all 95 values: 1–20 pg/mL in pmol/L
  • 1 pg/mL = 1.54 pmol/L
  • 1.1 pg/mL = 1.69 pmol/L
  • 1.2 pg/mL = 1.84 pmol/L
  • 1.3 pg/mL = 2 pmol/L
  • 1.4 pg/mL = 2.15 pmol/L
  • 1.5 pg/mL = 2.3 pmol/L
  • 1.6 pg/mL = 2.46 pmol/L
  • 1.7 pg/mL = 2.61 pmol/L
  • 1.8 pg/mL = 2.77 pmol/L
  • 1.9 pg/mL = 2.92 pmol/L
  • 2 pg/mL = 3.07 pmol/L
  • 2.1 pg/mL = 3.23 pmol/L
  • 2.2 pg/mL = 3.38 pmol/L
  • 2.3 pg/mL = 3.53 pmol/L
  • 2.4 pg/mL = 3.69 pmol/L
  • 2.5 pg/mL = 3.84 pmol/L
  • 2.6 pg/mL = 3.99 pmol/L
  • 2.7 pg/mL = 4.15 pmol/L
  • 2.8 pg/mL = 4.3 pmol/L
  • 2.9 pg/mL = 4.45 pmol/L
  • 3 pg/mL = 4.61 pmol/L
  • 3.1 pg/mL = 4.76 pmol/L
  • 3.2 pg/mL = 4.92 pmol/L
  • 3.3 pg/mL = 5.07 pmol/L
  • 3.4 pg/mL = 5.22 pmol/L
  • 3.5 pg/mL = 5.38 pmol/L
  • 3.6 pg/mL = 5.53 pmol/L
  • 3.7 pg/mL = 5.68 pmol/L
  • 3.8 pg/mL = 5.84 pmol/L
  • 3.9 pg/mL = 5.99 pmol/L
  • 4 pg/mL = 6.14 pmol/L
  • 4.1 pg/mL = 6.3 pmol/L
  • 4.2 pg/mL = 6.45 pmol/L
  • 4.3 pg/mL = 6.61 pmol/L
  • 4.4 pg/mL = 6.76 pmol/L
  • 4.5 pg/mL = 6.91 pmol/L
  • 4.6 pg/mL = 7.07 pmol/L
  • 4.7 pg/mL = 7.22 pmol/L
  • 4.8 pg/mL = 7.37 pmol/L
  • 4.9 pg/mL = 7.53 pmol/L
  • 5 pg/mL = 7.68 pmol/L
  • 5.1 pg/mL = 7.83 pmol/L
  • 5.2 pg/mL = 7.99 pmol/L
  • 5.3 pg/mL = 8.14 pmol/L
  • 5.4 pg/mL = 8.3 pmol/L
  • 5.5 pg/mL = 8.45 pmol/L
  • 5.6 pg/mL = 8.6 pmol/L
  • 5.7 pg/mL = 8.76 pmol/L
  • 5.8 pg/mL = 8.91 pmol/L
  • 5.9 pg/mL = 9.06 pmol/L
  • 6 pg/mL = 9.22 pmol/L
  • 6.1 pg/mL = 9.37 pmol/L
  • 6.2 pg/mL = 9.52 pmol/L
  • 6.3 pg/mL = 9.68 pmol/L
  • 6.4 pg/mL = 9.83 pmol/L
  • 6.5 pg/mL = 9.99 pmol/L
  • 6.6 pg/mL = 10.1 pmol/L
  • 6.7 pg/mL = 10.3 pmol/L
  • 6.8 pg/mL = 10.4 pmol/L
  • 6.9 pg/mL = 10.6 pmol/L
  • 7 pg/mL = 10.8 pmol/L
  • 7.1 pg/mL = 10.9 pmol/L
  • 7.2 pg/mL = 11.1 pmol/L
  • 7.3 pg/mL = 11.2 pmol/L
  • 7.4 pg/mL = 11.4 pmol/L
  • 7.5 pg/mL = 11.5 pmol/L
  • 7.6 pg/mL = 11.7 pmol/L
  • 7.7 pg/mL = 11.8 pmol/L
  • 7.8 pg/mL = 12 pmol/L
  • 7.9 pg/mL = 12.1 pmol/L
  • 8 pg/mL = 12.3 pmol/L
  • 8.5 pg/mL = 13.1 pmol/L
  • 9 pg/mL = 13.8 pmol/L
  • 9.5 pg/mL = 14.6 pmol/L
  • 10 pg/mL = 15.4 pmol/L
  • 10.5 pg/mL = 16.1 pmol/L
  • 11 pg/mL = 16.9 pmol/L
  • 11.5 pg/mL = 17.7 pmol/L
  • 12 pg/mL = 18.4 pmol/L
  • 12.5 pg/mL = 19.2 pmol/L
  • 13 pg/mL = 20 pmol/L
  • 13.5 pg/mL = 20.7 pmol/L
  • 14 pg/mL = 21.5 pmol/L
  • 14.5 pg/mL = 22.3 pmol/L
  • 15 pg/mL = 23 pmol/L
  • 15.5 pg/mL = 23.8 pmol/L
  • 16 pg/mL = 24.6 pmol/L
  • 16.5 pg/mL = 25.3 pmol/L
  • 17 pg/mL = 26.1 pmol/L
  • 17.5 pg/mL = 26.9 pmol/L
  • 18 pg/mL = 27.7 pmol/L
  • 18.5 pg/mL = 28.4 pmol/L
  • 19 pg/mL = 29.2 pmol/L
  • 19.5 pg/mL = 30 pmol/L
  • 20 pg/mL = 30.7 pmol/L
Show all 142 values: 1.5–30 pmol/L in pg/mL
  • 1.5 pmol/L = 0.98 pg/mL
  • 1.6 pmol/L = 1.04 pg/mL
  • 1.7 pmol/L = 1.11 pg/mL
  • 1.8 pmol/L = 1.17 pg/mL
  • 1.9 pmol/L = 1.24 pg/mL
  • 2 pmol/L = 1.3 pg/mL
  • 2.1 pmol/L = 1.37 pg/mL
  • 2.2 pmol/L = 1.43 pg/mL
  • 2.3 pmol/L = 1.5 pg/mL
  • 2.4 pmol/L = 1.56 pg/mL
  • 2.5 pmol/L = 1.63 pg/mL
  • 2.6 pmol/L = 1.69 pg/mL
  • 2.7 pmol/L = 1.76 pg/mL
  • 2.8 pmol/L = 1.82 pg/mL
  • 2.9 pmol/L = 1.89 pg/mL
  • 3 pmol/L = 1.95 pg/mL
  • 3.1 pmol/L = 2.02 pg/mL
  • 3.2 pmol/L = 2.08 pg/mL
  • 3.3 pmol/L = 2.15 pg/mL
  • 3.4 pmol/L = 2.21 pg/mL
  • 3.5 pmol/L = 2.28 pg/mL
  • 3.6 pmol/L = 2.34 pg/mL
  • 3.7 pmol/L = 2.41 pg/mL
  • 3.8 pmol/L = 2.47 pg/mL
  • 3.9 pmol/L = 2.54 pg/mL
  • 4 pmol/L = 2.6 pg/mL
  • 4.1 pmol/L = 2.67 pg/mL
  • 4.2 pmol/L = 2.73 pg/mL
  • 4.3 pmol/L = 2.8 pg/mL
  • 4.4 pmol/L = 2.86 pg/mL
  • 4.5 pmol/L = 2.93 pg/mL
  • 4.6 pmol/L = 2.99 pg/mL
  • 4.7 pmol/L = 3.06 pg/mL
  • 4.8 pmol/L = 3.12 pg/mL
  • 4.9 pmol/L = 3.19 pg/mL
  • 5 pmol/L = 3.25 pg/mL
  • 5.1 pmol/L = 3.32 pg/mL
  • 5.2 pmol/L = 3.39 pg/mL
  • 5.3 pmol/L = 3.45 pg/mL
  • 5.4 pmol/L = 3.52 pg/mL
  • 5.5 pmol/L = 3.58 pg/mL
  • 5.6 pmol/L = 3.65 pg/mL
  • 5.7 pmol/L = 3.71 pg/mL
  • 5.8 pmol/L = 3.78 pg/mL
  • 5.9 pmol/L = 3.84 pg/mL
  • 6 pmol/L = 3.91 pg/mL
  • 6.1 pmol/L = 3.97 pg/mL
  • 6.2 pmol/L = 4.04 pg/mL
  • 6.3 pmol/L = 4.1 pg/mL
  • 6.4 pmol/L = 4.17 pg/mL
  • 6.5 pmol/L = 4.23 pg/mL
  • 6.6 pmol/L = 4.3 pg/mL
  • 6.7 pmol/L = 4.36 pg/mL
  • 6.8 pmol/L = 4.43 pg/mL
  • 6.9 pmol/L = 4.49 pg/mL
  • 7 pmol/L = 4.56 pg/mL
  • 7.1 pmol/L = 4.62 pg/mL
  • 7.2 pmol/L = 4.69 pg/mL
  • 7.3 pmol/L = 4.75 pg/mL
  • 7.4 pmol/L = 4.82 pg/mL
  • 7.5 pmol/L = 4.88 pg/mL
  • 7.6 pmol/L = 4.95 pg/mL
  • 7.7 pmol/L = 5.01 pg/mL
  • 7.8 pmol/L = 5.08 pg/mL
  • 7.9 pmol/L = 5.14 pg/mL
  • 8 pmol/L = 5.21 pg/mL
  • 8.1 pmol/L = 5.27 pg/mL
  • 8.2 pmol/L = 5.34 pg/mL
  • 8.3 pmol/L = 5.4 pg/mL
  • 8.4 pmol/L = 5.47 pg/mL
  • 8.5 pmol/L = 5.53 pg/mL
  • 8.6 pmol/L = 5.6 pg/mL
  • 8.7 pmol/L = 5.66 pg/mL
  • 8.8 pmol/L = 5.73 pg/mL
  • 8.9 pmol/L = 5.79 pg/mL
  • 9 pmol/L = 5.86 pg/mL
  • 9.1 pmol/L = 5.92 pg/mL
  • 9.2 pmol/L = 5.99 pg/mL
  • 9.3 pmol/L = 6.05 pg/mL
  • 9.4 pmol/L = 6.12 pg/mL
  • 9.5 pmol/L = 6.18 pg/mL
  • 9.6 pmol/L = 6.25 pg/mL
  • 9.7 pmol/L = 6.31 pg/mL
  • 9.8 pmol/L = 6.38 pg/mL
  • 9.9 pmol/L = 6.44 pg/mL
  • 10 pmol/L = 6.51 pg/mL
  • 10.1 pmol/L = 6.57 pg/mL
  • 10.2 pmol/L = 6.64 pg/mL
  • 10.3 pmol/L = 6.7 pg/mL
  • 10.4 pmol/L = 6.77 pg/mL
  • 10.5 pmol/L = 6.84 pg/mL
  • 10.6 pmol/L = 6.9 pg/mL
  • 10.7 pmol/L = 6.97 pg/mL
  • 10.8 pmol/L = 7.03 pg/mL
  • 10.9 pmol/L = 7.1 pg/mL
  • 11 pmol/L = 7.16 pg/mL
  • 11.1 pmol/L = 7.23 pg/mL
  • 11.2 pmol/L = 7.29 pg/mL
  • 11.3 pmol/L = 7.36 pg/mL
  • 11.4 pmol/L = 7.42 pg/mL
  • 11.5 pmol/L = 7.49 pg/mL
  • 11.6 pmol/L = 7.55 pg/mL
  • 11.7 pmol/L = 7.62 pg/mL
  • 11.8 pmol/L = 7.68 pg/mL
  • 11.9 pmol/L = 7.75 pg/mL
  • 12 pmol/L = 7.81 pg/mL
  • 12.5 pmol/L = 8.14 pg/mL
  • 13 pmol/L = 8.46 pg/mL
  • 13.5 pmol/L = 8.79 pg/mL
  • 14 pmol/L = 9.11 pg/mL
  • 14.5 pmol/L = 9.44 pg/mL
  • 15 pmol/L = 9.76 pg/mL
  • 15.5 pmol/L = 10.1 pg/mL
  • 16 pmol/L = 10.4 pg/mL
  • 16.5 pmol/L = 10.7 pg/mL
  • 17 pmol/L = 11.1 pg/mL
  • 17.5 pmol/L = 11.4 pg/mL
  • 18 pmol/L = 11.7 pg/mL
  • 18.5 pmol/L = 12 pg/mL
  • 19 pmol/L = 12.4 pg/mL
  • 19.5 pmol/L = 12.7 pg/mL
  • 20 pmol/L = 13 pg/mL
  • 20.5 pmol/L = 13.3 pg/mL
  • 21 pmol/L = 13.7 pg/mL
  • 21.5 pmol/L = 14 pg/mL
  • 22 pmol/L = 14.3 pg/mL
  • 22.5 pmol/L = 14.6 pg/mL
  • 23 pmol/L = 15 pg/mL
  • 23.5 pmol/L = 15.3 pg/mL
  • 24 pmol/L = 15.6 pg/mL
  • 24.5 pmol/L = 15.9 pg/mL
  • 25 pmol/L = 16.3 pg/mL
  • 25.5 pmol/L = 16.6 pg/mL
  • 26 pmol/L = 16.9 pg/mL
  • 26.5 pmol/L = 17.3 pg/mL
  • 27 pmol/L = 17.6 pg/mL
  • 27.5 pmol/L = 17.9 pg/mL
  • 28 pmol/L = 18.2 pg/mL
  • 28.5 pmol/L = 18.6 pg/mL
  • 29 pmol/L = 18.9 pg/mL
  • 29.5 pmol/L = 19.2 pg/mL
  • 30 pmol/L = 19.5 pg/mL

About the test

Free T3 is the most active thyroid hormone; most of it is made from T4.

About the free T3 test · Triiodothyronine (T3) Tests — MedlinePlus (U.S. National Library of Medicine).

Questions

Free T3: what levels are typical?

MedlinePlus gives these typical ranges: Free T3: 2.1–4.4 pg/mL (3.23–6.76 pmol/L). Labs differ in method, so your lab may use other ranges; the one on your report is the one to go by.

How do I convert free T3 from pg/mL to pmol/L?

Multiply pg/mL by 1.5362. For example, 3 pg/mL is 4.61 pmol/L.

How do I convert free T3 from pmol/L to pg/mL?

Divide pmol/L by 1.5362. For example, 5.5 pmol/L is 3.58 pg/mL.

Why is the factor 1.5362?

It follows from the molar mass of liothyronine, T3, 650.97 g/mol, and from the volume each unit counts in.

Why does my lab’s free T3 range differ from another lab’s?

Each lab sets its range for its own method and equipment, and many ranges differ by age and sex. That’s why a result is best read against the range printed on the same report.

Related conversions

Free T3 3 pg/mL= 4.61 pmol/L

Soma converts straight from the PDF

Share a lab report to Soma, and it reads every row on your phone and converts the units for you, so a Quest result in mg/dL and a Synlab result in mmol/L sit on one chart, each against its own lab’s range. No account, nothing uploaded.

Get notified at launch

Sources: PubChem: Liothyronine (liothyronine, T3), molar mass 650.97 g/mol; the test description from MedlinePlus. Mention of a source doesn’t mean it endorses Soma.