Millimoles per liter or milligrams per deciliter?
There are two different ways of measuring blood glucose levels: It can either be in terms of a molar concentration, measured in mmol/L or a mass concentration, measured in mg/dL. Most blood glucose meters are prefixed to measure in one or the other. This avoids accidental switching – which could be fatal.
However, you still have to be aware of the different measurement units: If information are listed in the units your meter does not support, you need to convert the values.
Blood glucose conversion tables
mg/dL in mmol/L, conversion factor: 1 mg/dL = 0.0555 mmol/L
| mg/dL | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 |
| mmol/L | 0.6 | 0.8 | 1.1 | 1.4 | 1.7 | 1.9 | 2.2 | 2.5 | 2.8 | 3.1 | 3.3 | 3.6 | 3.9 | 4.2 | 4.4 | 4.7 | 5.0 |
| mg/dl | 95 | 100 | 110 | 120 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 | 240 | 250 |
| mmol/L | 5.3 | 5.6 | 6.1 | 6.7 | 7.2 | 7.8 | 8.3 | 8.9 | 9.4 | 10.0 | 10.5 | 11.1 | 11.7 | 12.2 | 12.8 | 13.3 | 13.9 |
| mg/dL | 260 | 270 | 280 | 290 | 300 | 325 | 350 | 375 | 400 | 425 | 450 | 475 | 500 | 525 | 550 | 575 | 600 |
| mmol/L | 14.4 | 15.0 | 15.5 | 16.1 | 16.7 | 18.0 | 19.4 | 20.8 | 22.2 | 23.6 | 25.0 | 26.4 | 27.8 | 29.1 | 30.5 | 31.9 | 33.3 |
mmol/L in mg/dL, conversion factor: 1 mmol/L = 18,018 mg/dL
| mmol/L | 0.6 | 0.8 | 1 | 1.2 | 1.4 | 1.6 | 1.8 | 2 | 2.2 | 2.4 | 2.6 | 2.8 | 3 | 3.3 | 3.6 | 4 | 4.5 |
| mg/dL | 11 | 14 | 18 | 22 | 25 | 29 | 32 | 36 | 40 | 43 | 47 | 50 | 54 | 59 | 65 | 72 | 81 |
| mmol/L | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| mg/dL | 90 | 99 | 108 | 117 | 126 | 135 | 144 | 153 | 162 | 171 | 180 | 198 | 216 | 234 | 252 | 270 | 288 |
| mmol/L | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 |
| mg/dL | 306 | 324 | 342 | 360 | 378 | 396 | 414 | 432 | 450 | 468 | 486 | 505 | 523 | 541 | 559 | 577 | 595 |