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  3. Prolactin

Prolactin: ng/mL to mIU/L

Labs print prolactin either as a mass, in ng/mL (common in the US), or in international units, in mIU/L (common in the UK and much of Europe); µIU/mL is the same number as mIU/L. To convert, multiply ng/mL by 21.2; to go back, divide mIU/L by 21.2.

ng/mL
Same value in318mIU/L

mIU/L = ng/mL × 21.2 · WHO 3rd International Standard 84/500

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

ng/mL → mIU/L
mIU/L = ng/mL × 21.2
mIU/L → ng/mL
ng/mL = mIU/L ÷ 21.2
Where 21.2 comes from
Prolactin is a protein, and mIU/L counts its activity against a WHO reference standard rather than its molecules. The 3rd International Standard (84/500) holds 53 mIU in about 2.5 µg of prolactin, so 1 ng/mL is 21.2 mIU/L for tests calibrated to it. Tests calibrated to the newer 4th standard (83/573: 67 mIU in about 3.2 µg) come out near 20.9, and some kits state a factor of their own; if your report prints one, that is the one to use.

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.

ng/mLmIU/L
2 ng/mL42.4 mIU/L
5 ng/mL106 mIU/L
10 ng/mL212 mIU/L
15 ng/mL318 mIU/L
20 ng/mL424 mIU/L
25 ng/mL530 mIU/L
30 ng/mL636 mIU/L
40 ng/mL848 mIU/L
50 ng/mL1060 mIU/L
100 ng/mL2120 mIU/L
200 ng/mL4240 mIU/L
mIU/Lng/mL
50 mIU/L2.36 ng/mL
100 mIU/L4.72 ng/mL
150 mIU/L7.08 ng/mL
200 mIU/L9.43 ng/mL
300 mIU/L14.2 ng/mL
400 mIU/L18.9 ng/mL
500 mIU/L23.6 ng/mL
750 mIU/L35.4 ng/mL
1000 mIU/L47.2 ng/mL
2000 mIU/L94.3 ng/mL
Show all 239 values: 1–300 ng/mL in mIU/L
  • 1 ng/mL = 21.2 mIU/L
  • 1.5 ng/mL = 31.8 mIU/L
  • 2 ng/mL = 42.4 mIU/L
  • 2.5 ng/mL = 53 mIU/L
  • 3 ng/mL = 63.6 mIU/L
  • 3.5 ng/mL = 74.2 mIU/L
  • 4 ng/mL = 84.8 mIU/L
  • 4.5 ng/mL = 95.4 mIU/L
  • 5 ng/mL = 106 mIU/L
  • 5.5 ng/mL = 116.6 mIU/L
  • 6 ng/mL = 127.2 mIU/L
  • 6.5 ng/mL = 137.8 mIU/L
  • 7 ng/mL = 148.4 mIU/L
  • 7.5 ng/mL = 159 mIU/L
  • 8 ng/mL = 169.6 mIU/L
  • 8.5 ng/mL = 180.2 mIU/L
  • 9 ng/mL = 190.8 mIU/L
  • 9.5 ng/mL = 201.4 mIU/L
  • 10 ng/mL = 212 mIU/L
  • 10.5 ng/mL = 222.6 mIU/L
  • 11 ng/mL = 233.2 mIU/L
  • 11.5 ng/mL = 243.8 mIU/L
  • 12 ng/mL = 254.4 mIU/L
  • 12.5 ng/mL = 265 mIU/L
  • 13 ng/mL = 275.6 mIU/L
  • 13.5 ng/mL = 286.2 mIU/L
  • 14 ng/mL = 296.8 mIU/L
  • 14.5 ng/mL = 307.4 mIU/L
  • 15 ng/mL = 318 mIU/L
  • 15.5 ng/mL = 328.6 mIU/L
  • 16 ng/mL = 339.2 mIU/L
  • 16.5 ng/mL = 349.8 mIU/L
  • 17 ng/mL = 360.4 mIU/L
  • 17.5 ng/mL = 371 mIU/L
  • 18 ng/mL = 381.6 mIU/L
  • 18.5 ng/mL = 392.2 mIU/L
  • 19 ng/mL = 402.8 mIU/L
  • 19.5 ng/mL = 413.4 mIU/L
  • 20 ng/mL = 424 mIU/L
  • 20.5 ng/mL = 434.6 mIU/L
  • 21 ng/mL = 445.2 mIU/L
  • 21.5 ng/mL = 455.8 mIU/L
  • 22 ng/mL = 466.4 mIU/L
  • 22.5 ng/mL = 477 mIU/L
  • 23 ng/mL = 487.6 mIU/L
  • 23.5 ng/mL = 498.2 mIU/L
  • 24 ng/mL = 508.8 mIU/L
  • 24.5 ng/mL = 519.4 mIU/L
  • 25 ng/mL = 530 mIU/L
  • 25.5 ng/mL = 540.6 mIU/L
  • 26 ng/mL = 551.2 mIU/L
  • 26.5 ng/mL = 561.8 mIU/L
  • 27 ng/mL = 572.4 mIU/L
  • 27.5 ng/mL = 583 mIU/L
  • 28 ng/mL = 593.6 mIU/L
  • 28.5 ng/mL = 604.2 mIU/L
  • 29 ng/mL = 614.8 mIU/L
  • 29.5 ng/mL = 625.4 mIU/L
  • 30 ng/mL = 636 mIU/L
  • 30.5 ng/mL = 646.6 mIU/L
  • 31 ng/mL = 657.2 mIU/L
  • 31.5 ng/mL = 667.8 mIU/L
  • 32 ng/mL = 678.4 mIU/L
  • 32.5 ng/mL = 689 mIU/L
  • 33 ng/mL = 699.6 mIU/L
  • 33.5 ng/mL = 710.2 mIU/L
  • 34 ng/mL = 720.8 mIU/L
  • 34.5 ng/mL = 731.4 mIU/L
  • 35 ng/mL = 742 mIU/L
  • 35.5 ng/mL = 752.6 mIU/L
  • 36 ng/mL = 763.2 mIU/L
  • 36.5 ng/mL = 773.8 mIU/L
  • 37 ng/mL = 784.4 mIU/L
  • 37.5 ng/mL = 795 mIU/L
  • 38 ng/mL = 805.6 mIU/L
  • 38.5 ng/mL = 816.2 mIU/L
  • 39 ng/mL = 826.8 mIU/L
  • 39.5 ng/mL = 837.4 mIU/L
  • 40 ng/mL = 848 mIU/L
  • 40.5 ng/mL = 858.6 mIU/L
  • 41 ng/mL = 869.2 mIU/L
  • 41.5 ng/mL = 879.8 mIU/L
  • 42 ng/mL = 890.4 mIU/L
  • 42.5 ng/mL = 901 mIU/L
  • 43 ng/mL = 911.6 mIU/L
  • 43.5 ng/mL = 922.2 mIU/L
  • 44 ng/mL = 932.8 mIU/L
  • 44.5 ng/mL = 943.4 mIU/L
  • 45 ng/mL = 954 mIU/L
  • 45.5 ng/mL = 964.6 mIU/L
  • 46 ng/mL = 975.2 mIU/L
  • 46.5 ng/mL = 985.8 mIU/L
  • 47 ng/mL = 996.4 mIU/L
  • 47.5 ng/mL = 1007 mIU/L
  • 48 ng/mL = 1018 mIU/L
  • 48.5 ng/mL = 1028 mIU/L
  • 49 ng/mL = 1039 mIU/L
  • 49.5 ng/mL = 1049 mIU/L
  • 50 ng/mL = 1060 mIU/L
  • 50.5 ng/mL = 1071 mIU/L
  • 51 ng/mL = 1081 mIU/L
  • 51.5 ng/mL = 1092 mIU/L
  • 52 ng/mL = 1102 mIU/L
  • 52.5 ng/mL = 1113 mIU/L
  • 53 ng/mL = 1124 mIU/L
  • 53.5 ng/mL = 1134 mIU/L
  • 54 ng/mL = 1145 mIU/L
  • 54.5 ng/mL = 1155 mIU/L
  • 55 ng/mL = 1166 mIU/L
  • 55.5 ng/mL = 1177 mIU/L
  • 56 ng/mL = 1187 mIU/L
  • 56.5 ng/mL = 1198 mIU/L
  • 57 ng/mL = 1208 mIU/L
  • 57.5 ng/mL = 1219 mIU/L
  • 58 ng/mL = 1230 mIU/L
  • 58.5 ng/mL = 1240 mIU/L
  • 59 ng/mL = 1251 mIU/L
  • 59.5 ng/mL = 1261 mIU/L
  • 60 ng/mL = 1272 mIU/L
  • 60.5 ng/mL = 1283 mIU/L
  • 61 ng/mL = 1293 mIU/L
  • 61.5 ng/mL = 1304 mIU/L
  • 62 ng/mL = 1314 mIU/L
  • 62.5 ng/mL = 1325 mIU/L
  • 63 ng/mL = 1336 mIU/L
  • 63.5 ng/mL = 1346 mIU/L
  • 64 ng/mL = 1357 mIU/L
  • 64.5 ng/mL = 1367 mIU/L
  • 65 ng/mL = 1378 mIU/L
  • 65.5 ng/mL = 1389 mIU/L
  • 66 ng/mL = 1399 mIU/L
  • 66.5 ng/mL = 1410 mIU/L
  • 67 ng/mL = 1420 mIU/L
  • 67.5 ng/mL = 1431 mIU/L
  • 68 ng/mL = 1442 mIU/L
  • 68.5 ng/mL = 1452 mIU/L
  • 69 ng/mL = 1463 mIU/L
  • 69.5 ng/mL = 1473 mIU/L
  • 70 ng/mL = 1484 mIU/L
  • 70.5 ng/mL = 1495 mIU/L
  • 71 ng/mL = 1505 mIU/L
  • 71.5 ng/mL = 1516 mIU/L
  • 72 ng/mL = 1526 mIU/L
  • 72.5 ng/mL = 1537 mIU/L
  • 73 ng/mL = 1548 mIU/L
  • 73.5 ng/mL = 1558 mIU/L
  • 74 ng/mL = 1569 mIU/L
  • 74.5 ng/mL = 1579 mIU/L
  • 75 ng/mL = 1590 mIU/L
  • 75.5 ng/mL = 1601 mIU/L
  • 76 ng/mL = 1611 mIU/L
  • 76.5 ng/mL = 1622 mIU/L
  • 77 ng/mL = 1632 mIU/L
  • 77.5 ng/mL = 1643 mIU/L
  • 78 ng/mL = 1654 mIU/L
  • 78.5 ng/mL = 1664 mIU/L
  • 79 ng/mL = 1675 mIU/L
  • 79.5 ng/mL = 1685 mIU/L
  • 80 ng/mL = 1696 mIU/L
  • 80.5 ng/mL = 1707 mIU/L
  • 81 ng/mL = 1717 mIU/L
  • 81.5 ng/mL = 1728 mIU/L
  • 82 ng/mL = 1738 mIU/L
  • 82.5 ng/mL = 1749 mIU/L
  • 83 ng/mL = 1760 mIU/L
  • 83.5 ng/mL = 1770 mIU/L
  • 84 ng/mL = 1781 mIU/L
  • 84.5 ng/mL = 1791 mIU/L
  • 85 ng/mL = 1802 mIU/L
  • 85.5 ng/mL = 1813 mIU/L
  • 86 ng/mL = 1823 mIU/L
  • 86.5 ng/mL = 1834 mIU/L
  • 87 ng/mL = 1844 mIU/L
  • 87.5 ng/mL = 1855 mIU/L
  • 88 ng/mL = 1866 mIU/L
  • 88.5 ng/mL = 1876 mIU/L
  • 89 ng/mL = 1887 mIU/L
  • 89.5 ng/mL = 1897 mIU/L
  • 90 ng/mL = 1908 mIU/L
  • 90.5 ng/mL = 1919 mIU/L
  • 91 ng/mL = 1929 mIU/L
  • 91.5 ng/mL = 1940 mIU/L
  • 92 ng/mL = 1950 mIU/L
  • 92.5 ng/mL = 1961 mIU/L
  • 93 ng/mL = 1972 mIU/L
  • 93.5 ng/mL = 1982 mIU/L
  • 94 ng/mL = 1993 mIU/L
  • 94.5 ng/mL = 2003 mIU/L
  • 95 ng/mL = 2014 mIU/L
  • 95.5 ng/mL = 2025 mIU/L
  • 96 ng/mL = 2035 mIU/L
  • 96.5 ng/mL = 2046 mIU/L
  • 97 ng/mL = 2056 mIU/L
  • 97.5 ng/mL = 2067 mIU/L
  • 98 ng/mL = 2078 mIU/L
  • 98.5 ng/mL = 2088 mIU/L
  • 99 ng/mL = 2099 mIU/L
  • 99.5 ng/mL = 2109 mIU/L
  • 100 ng/mL = 2120 mIU/L
  • 105 ng/mL = 2226 mIU/L
  • 110 ng/mL = 2332 mIU/L
  • 115 ng/mL = 2438 mIU/L
  • 120 ng/mL = 2544 mIU/L
  • 125 ng/mL = 2650 mIU/L
  • 130 ng/mL = 2756 mIU/L
  • 135 ng/mL = 2862 mIU/L
  • 140 ng/mL = 2968 mIU/L
  • 145 ng/mL = 3074 mIU/L
  • 150 ng/mL = 3180 mIU/L
  • 155 ng/mL = 3286 mIU/L
  • 160 ng/mL = 3392 mIU/L
  • 165 ng/mL = 3498 mIU/L
  • 170 ng/mL = 3604 mIU/L
  • 175 ng/mL = 3710 mIU/L
  • 180 ng/mL = 3816 mIU/L
  • 185 ng/mL = 3922 mIU/L
  • 190 ng/mL = 4028 mIU/L
  • 195 ng/mL = 4134 mIU/L
  • 200 ng/mL = 4240 mIU/L
  • 205 ng/mL = 4346 mIU/L
  • 210 ng/mL = 4452 mIU/L
  • 215 ng/mL = 4558 mIU/L
  • 220 ng/mL = 4664 mIU/L
  • 225 ng/mL = 4770 mIU/L
  • 230 ng/mL = 4876 mIU/L
  • 235 ng/mL = 4982 mIU/L
  • 240 ng/mL = 5088 mIU/L
  • 245 ng/mL = 5194 mIU/L
  • 250 ng/mL = 5300 mIU/L
  • 255 ng/mL = 5406 mIU/L
  • 260 ng/mL = 5512 mIU/L
  • 265 ng/mL = 5618 mIU/L
  • 270 ng/mL = 5724 mIU/L
  • 275 ng/mL = 5830 mIU/L
  • 280 ng/mL = 5936 mIU/L
  • 285 ng/mL = 6042 mIU/L
  • 290 ng/mL = 6148 mIU/L
  • 295 ng/mL = 6254 mIU/L
  • 300 ng/mL = 6360 mIU/L
Show all 297 values: 20–6000 mIU/L in ng/mL
  • 20 mIU/L = 0.94 ng/mL
  • 25 mIU/L = 1.18 ng/mL
  • 30 mIU/L = 1.42 ng/mL
  • 35 mIU/L = 1.65 ng/mL
  • 40 mIU/L = 1.89 ng/mL
  • 45 mIU/L = 2.12 ng/mL
  • 50 mIU/L = 2.36 ng/mL
  • 55 mIU/L = 2.59 ng/mL
  • 60 mIU/L = 2.83 ng/mL
  • 65 mIU/L = 3.07 ng/mL
  • 70 mIU/L = 3.3 ng/mL
  • 75 mIU/L = 3.54 ng/mL
  • 80 mIU/L = 3.77 ng/mL
  • 85 mIU/L = 4.01 ng/mL
  • 90 mIU/L = 4.25 ng/mL
  • 95 mIU/L = 4.48 ng/mL
  • 100 mIU/L = 4.72 ng/mL
  • 105 mIU/L = 4.95 ng/mL
  • 110 mIU/L = 5.19 ng/mL
  • 115 mIU/L = 5.42 ng/mL
  • 120 mIU/L = 5.66 ng/mL
  • 125 mIU/L = 5.9 ng/mL
  • 130 mIU/L = 6.13 ng/mL
  • 135 mIU/L = 6.37 ng/mL
  • 140 mIU/L = 6.6 ng/mL
  • 145 mIU/L = 6.84 ng/mL
  • 150 mIU/L = 7.08 ng/mL
  • 155 mIU/L = 7.31 ng/mL
  • 160 mIU/L = 7.55 ng/mL
  • 165 mIU/L = 7.78 ng/mL
  • 170 mIU/L = 8.02 ng/mL
  • 175 mIU/L = 8.25 ng/mL
  • 180 mIU/L = 8.49 ng/mL
  • 185 mIU/L = 8.73 ng/mL
  • 190 mIU/L = 8.96 ng/mL
  • 195 mIU/L = 9.2 ng/mL
  • 200 mIU/L = 9.43 ng/mL
  • 205 mIU/L = 9.67 ng/mL
  • 210 mIU/L = 9.91 ng/mL
  • 215 mIU/L = 10.1 ng/mL
  • 220 mIU/L = 10.4 ng/mL
  • 225 mIU/L = 10.6 ng/mL
  • 230 mIU/L = 10.8 ng/mL
  • 235 mIU/L = 11.1 ng/mL
  • 240 mIU/L = 11.3 ng/mL
  • 245 mIU/L = 11.6 ng/mL
  • 250 mIU/L = 11.8 ng/mL
  • 255 mIU/L = 12 ng/mL
  • 260 mIU/L = 12.3 ng/mL
  • 265 mIU/L = 12.5 ng/mL
  • 270 mIU/L = 12.7 ng/mL
  • 275 mIU/L = 13 ng/mL
  • 280 mIU/L = 13.2 ng/mL
  • 285 mIU/L = 13.4 ng/mL
  • 290 mIU/L = 13.7 ng/mL
  • 295 mIU/L = 13.9 ng/mL
  • 300 mIU/L = 14.2 ng/mL
  • 305 mIU/L = 14.4 ng/mL
  • 310 mIU/L = 14.6 ng/mL
  • 315 mIU/L = 14.9 ng/mL
  • 320 mIU/L = 15.1 ng/mL
  • 325 mIU/L = 15.3 ng/mL
  • 330 mIU/L = 15.6 ng/mL
  • 335 mIU/L = 15.8 ng/mL
  • 340 mIU/L = 16 ng/mL
  • 345 mIU/L = 16.3 ng/mL
  • 350 mIU/L = 16.5 ng/mL
  • 355 mIU/L = 16.7 ng/mL
  • 360 mIU/L = 17 ng/mL
  • 365 mIU/L = 17.2 ng/mL
  • 370 mIU/L = 17.5 ng/mL
  • 375 mIU/L = 17.7 ng/mL
  • 380 mIU/L = 17.9 ng/mL
  • 385 mIU/L = 18.2 ng/mL
  • 390 mIU/L = 18.4 ng/mL
  • 395 mIU/L = 18.6 ng/mL
  • 400 mIU/L = 18.9 ng/mL
  • 405 mIU/L = 19.1 ng/mL
  • 410 mIU/L = 19.3 ng/mL
  • 415 mIU/L = 19.6 ng/mL
  • 420 mIU/L = 19.8 ng/mL
  • 425 mIU/L = 20 ng/mL
  • 430 mIU/L = 20.3 ng/mL
  • 435 mIU/L = 20.5 ng/mL
  • 440 mIU/L = 20.8 ng/mL
  • 445 mIU/L = 21 ng/mL
  • 450 mIU/L = 21.2 ng/mL
  • 455 mIU/L = 21.5 ng/mL
  • 460 mIU/L = 21.7 ng/mL
  • 465 mIU/L = 21.9 ng/mL
  • 470 mIU/L = 22.2 ng/mL
  • 475 mIU/L = 22.4 ng/mL
  • 480 mIU/L = 22.6 ng/mL
  • 485 mIU/L = 22.9 ng/mL
  • 490 mIU/L = 23.1 ng/mL
  • 495 mIU/L = 23.3 ng/mL
  • 500 mIU/L = 23.6 ng/mL
  • 505 mIU/L = 23.8 ng/mL
  • 510 mIU/L = 24.1 ng/mL
  • 515 mIU/L = 24.3 ng/mL
  • 520 mIU/L = 24.5 ng/mL
  • 525 mIU/L = 24.8 ng/mL
  • 530 mIU/L = 25 ng/mL
  • 535 mIU/L = 25.2 ng/mL
  • 540 mIU/L = 25.5 ng/mL
  • 545 mIU/L = 25.7 ng/mL
  • 550 mIU/L = 25.9 ng/mL
  • 555 mIU/L = 26.2 ng/mL
  • 560 mIU/L = 26.4 ng/mL
  • 565 mIU/L = 26.7 ng/mL
  • 570 mIU/L = 26.9 ng/mL
  • 575 mIU/L = 27.1 ng/mL
  • 580 mIU/L = 27.4 ng/mL
  • 585 mIU/L = 27.6 ng/mL
  • 590 mIU/L = 27.8 ng/mL
  • 595 mIU/L = 28.1 ng/mL
  • 600 mIU/L = 28.3 ng/mL
  • 605 mIU/L = 28.5 ng/mL
  • 610 mIU/L = 28.8 ng/mL
  • 615 mIU/L = 29 ng/mL
  • 620 mIU/L = 29.2 ng/mL
  • 625 mIU/L = 29.5 ng/mL
  • 630 mIU/L = 29.7 ng/mL
  • 635 mIU/L = 30 ng/mL
  • 640 mIU/L = 30.2 ng/mL
  • 645 mIU/L = 30.4 ng/mL
  • 650 mIU/L = 30.7 ng/mL
  • 655 mIU/L = 30.9 ng/mL
  • 660 mIU/L = 31.1 ng/mL
  • 665 mIU/L = 31.4 ng/mL
  • 670 mIU/L = 31.6 ng/mL
  • 675 mIU/L = 31.8 ng/mL
  • 680 mIU/L = 32.1 ng/mL
  • 685 mIU/L = 32.3 ng/mL
  • 690 mIU/L = 32.5 ng/mL
  • 695 mIU/L = 32.8 ng/mL
  • 700 mIU/L = 33 ng/mL
  • 705 mIU/L = 33.3 ng/mL
  • 710 mIU/L = 33.5 ng/mL
  • 715 mIU/L = 33.7 ng/mL
  • 720 mIU/L = 34 ng/mL
  • 725 mIU/L = 34.2 ng/mL
  • 730 mIU/L = 34.4 ng/mL
  • 735 mIU/L = 34.7 ng/mL
  • 740 mIU/L = 34.9 ng/mL
  • 745 mIU/L = 35.1 ng/mL
  • 750 mIU/L = 35.4 ng/mL
  • 755 mIU/L = 35.6 ng/mL
  • 760 mIU/L = 35.8 ng/mL
  • 765 mIU/L = 36.1 ng/mL
  • 770 mIU/L = 36.3 ng/mL
  • 775 mIU/L = 36.6 ng/mL
  • 780 mIU/L = 36.8 ng/mL
  • 785 mIU/L = 37 ng/mL
  • 790 mIU/L = 37.3 ng/mL
  • 795 mIU/L = 37.5 ng/mL
  • 800 mIU/L = 37.7 ng/mL
  • 805 mIU/L = 38 ng/mL
  • 810 mIU/L = 38.2 ng/mL
  • 815 mIU/L = 38.4 ng/mL
  • 820 mIU/L = 38.7 ng/mL
  • 825 mIU/L = 38.9 ng/mL
  • 830 mIU/L = 39.2 ng/mL
  • 835 mIU/L = 39.4 ng/mL
  • 840 mIU/L = 39.6 ng/mL
  • 845 mIU/L = 39.9 ng/mL
  • 850 mIU/L = 40.1 ng/mL
  • 855 mIU/L = 40.3 ng/mL
  • 860 mIU/L = 40.6 ng/mL
  • 865 mIU/L = 40.8 ng/mL
  • 870 mIU/L = 41 ng/mL
  • 875 mIU/L = 41.3 ng/mL
  • 880 mIU/L = 41.5 ng/mL
  • 885 mIU/L = 41.7 ng/mL
  • 890 mIU/L = 42 ng/mL
  • 895 mIU/L = 42.2 ng/mL
  • 900 mIU/L = 42.5 ng/mL
  • 905 mIU/L = 42.7 ng/mL
  • 910 mIU/L = 42.9 ng/mL
  • 915 mIU/L = 43.2 ng/mL
  • 920 mIU/L = 43.4 ng/mL
  • 925 mIU/L = 43.6 ng/mL
  • 930 mIU/L = 43.9 ng/mL
  • 935 mIU/L = 44.1 ng/mL
  • 940 mIU/L = 44.3 ng/mL
  • 945 mIU/L = 44.6 ng/mL
  • 950 mIU/L = 44.8 ng/mL
  • 955 mIU/L = 45 ng/mL
  • 960 mIU/L = 45.3 ng/mL
  • 965 mIU/L = 45.5 ng/mL
  • 970 mIU/L = 45.8 ng/mL
  • 975 mIU/L = 46 ng/mL
  • 980 mIU/L = 46.2 ng/mL
  • 985 mIU/L = 46.5 ng/mL
  • 990 mIU/L = 46.7 ng/mL
  • 995 mIU/L = 46.9 ng/mL
  • 1000 mIU/L = 47.2 ng/mL
  • 1050 mIU/L = 49.5 ng/mL
  • 1100 mIU/L = 51.9 ng/mL
  • 1150 mIU/L = 54.2 ng/mL
  • 1200 mIU/L = 56.6 ng/mL
  • 1250 mIU/L = 59 ng/mL
  • 1300 mIU/L = 61.3 ng/mL
  • 1350 mIU/L = 63.7 ng/mL
  • 1400 mIU/L = 66 ng/mL
  • 1450 mIU/L = 68.4 ng/mL
  • 1500 mIU/L = 70.8 ng/mL
  • 1550 mIU/L = 73.1 ng/mL
  • 1600 mIU/L = 75.5 ng/mL
  • 1650 mIU/L = 77.8 ng/mL
  • 1700 mIU/L = 80.2 ng/mL
  • 1750 mIU/L = 82.5 ng/mL
  • 1800 mIU/L = 84.9 ng/mL
  • 1850 mIU/L = 87.3 ng/mL
  • 1900 mIU/L = 89.6 ng/mL
  • 1950 mIU/L = 92 ng/mL
  • 2000 mIU/L = 94.3 ng/mL
  • 2050 mIU/L = 96.7 ng/mL
  • 2100 mIU/L = 99.1 ng/mL
  • 2150 mIU/L = 101.4 ng/mL
  • 2200 mIU/L = 103.8 ng/mL
  • 2250 mIU/L = 106.1 ng/mL
  • 2300 mIU/L = 108.5 ng/mL
  • 2350 mIU/L = 110.8 ng/mL
  • 2400 mIU/L = 113.2 ng/mL
  • 2450 mIU/L = 115.6 ng/mL
  • 2500 mIU/L = 117.9 ng/mL
  • 2550 mIU/L = 120.3 ng/mL
  • 2600 mIU/L = 122.6 ng/mL
  • 2650 mIU/L = 125 ng/mL
  • 2700 mIU/L = 127.4 ng/mL
  • 2750 mIU/L = 129.7 ng/mL
  • 2800 mIU/L = 132.1 ng/mL
  • 2850 mIU/L = 134.4 ng/mL
  • 2900 mIU/L = 136.8 ng/mL
  • 2950 mIU/L = 139.2 ng/mL
  • 3000 mIU/L = 141.5 ng/mL
  • 3050 mIU/L = 143.9 ng/mL
  • 3100 mIU/L = 146.2 ng/mL
  • 3150 mIU/L = 148.6 ng/mL
  • 3200 mIU/L = 150.9 ng/mL
  • 3250 mIU/L = 153.3 ng/mL
  • 3300 mIU/L = 155.7 ng/mL
  • 3350 mIU/L = 158 ng/mL
  • 3400 mIU/L = 160.4 ng/mL
  • 3450 mIU/L = 162.7 ng/mL
  • 3500 mIU/L = 165.1 ng/mL
  • 3550 mIU/L = 167.5 ng/mL
  • 3600 mIU/L = 169.8 ng/mL
  • 3650 mIU/L = 172.2 ng/mL
  • 3700 mIU/L = 174.5 ng/mL
  • 3750 mIU/L = 176.9 ng/mL
  • 3800 mIU/L = 179.2 ng/mL
  • 3850 mIU/L = 181.6 ng/mL
  • 3900 mIU/L = 184 ng/mL
  • 3950 mIU/L = 186.3 ng/mL
  • 4000 mIU/L = 188.7 ng/mL
  • 4050 mIU/L = 191 ng/mL
  • 4100 mIU/L = 193.4 ng/mL
  • 4150 mIU/L = 195.8 ng/mL
  • 4200 mIU/L = 198.1 ng/mL
  • 4250 mIU/L = 200.5 ng/mL
  • 4300 mIU/L = 202.8 ng/mL
  • 4350 mIU/L = 205.2 ng/mL
  • 4400 mIU/L = 207.5 ng/mL
  • 4450 mIU/L = 209.9 ng/mL
  • 4500 mIU/L = 212.3 ng/mL
  • 4550 mIU/L = 214.6 ng/mL
  • 4600 mIU/L = 217 ng/mL
  • 4650 mIU/L = 219.3 ng/mL
  • 4700 mIU/L = 221.7 ng/mL
  • 4750 mIU/L = 224.1 ng/mL
  • 4800 mIU/L = 226.4 ng/mL
  • 4850 mIU/L = 228.8 ng/mL
  • 4900 mIU/L = 231.1 ng/mL
  • 4950 mIU/L = 233.5 ng/mL
  • 5000 mIU/L = 235.8 ng/mL
  • 5050 mIU/L = 238.2 ng/mL
  • 5100 mIU/L = 240.6 ng/mL
  • 5150 mIU/L = 242.9 ng/mL
  • 5200 mIU/L = 245.3 ng/mL
  • 5250 mIU/L = 247.6 ng/mL
  • 5300 mIU/L = 250 ng/mL
  • 5350 mIU/L = 252.4 ng/mL
  • 5400 mIU/L = 254.7 ng/mL
  • 5450 mIU/L = 257.1 ng/mL
  • 5500 mIU/L = 259.4 ng/mL
  • 5550 mIU/L = 261.8 ng/mL
  • 5600 mIU/L = 264.2 ng/mL
  • 5650 mIU/L = 266.5 ng/mL
  • 5700 mIU/L = 268.9 ng/mL
  • 5750 mIU/L = 271.2 ng/mL
  • 5800 mIU/L = 273.6 ng/mL
  • 5850 mIU/L = 275.9 ng/mL
  • 5900 mIU/L = 278.3 ng/mL
  • 5950 mIU/L = 280.7 ng/mL
  • 6000 mIU/L = 283 ng/mL

About the test

Prolactin is a pituitary hormone responsible for milk production. It rises with stress, sleep and some medicines.

About the prolactin test · Prolactin Levels — MedlinePlus (U.S. National Library of Medicine).

Questions

How do I convert prolactin from ng/mL to mIU/L?

Multiply ng/mL by 21.2. For example, 15 ng/mL is 318 mIU/L.

How do I convert prolactin from mIU/L to ng/mL?

Divide mIU/L by 21.2. For example, 400 mIU/L is 18.9 ng/mL.

Why is the factor 21.2?

It comes from the WHO 3rd International Standard for prolactin (84/500): 53 mIU in about 2.5 µg, or 21.2 mIU per microgram. Many tests are calibrated to it; a test calibrated differently states its own factor, and that one wins.

Related conversions

Prolactin 15 ng/mL= 318 mIU/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.

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Sources: the factor from the WHO 3rd International Standard for prolactin, 84/500 (NIBSC); the test description from MedlinePlus. Mention of a source doesn’t mean it endorses Soma.