Conversion chart
Round numbers on each side. Print this page to keep the chart next to your meter.
| mmol/L | mg/dL |
|---|---|
| 2.0 | 36 |
| 2.5 | 45 |
| 3.0 | 54 |
| 3.5 | 63 |
| 4.0 | 72 |
| 4.5 | 81 |
| 5.0 | 90 |
| 5.5 | 99 |
| 6.0 | 108 |
| 6.5 | 117 |
| 7.0 | 126 |
| 7.5 | 135 |
| 8.0 | 144 |
| 8.5 | 153 |
| 9.0 | 162 |
| 9.5 | 171 |
| 10.0 | 180 |
| 10.5 | 189 |
| 11.0 | 198 |
| 11.5 | 207 |
| 12.0 | 216 |
| 12.5 | 225 |
| 13.0 | 234 |
| 13.5 | 243 |
| 14.0 | 252 |
| 14.5 | 261 |
| 15.0 | 270 |
| 15.5 | 279 |
| 16.0 | 288 |
| 16.5 | 297 |
| 17.0 | 306 |
| 17.5 | 315 |
| 18.0 | 324 |
| 18.5 | 333 |
| 19.0 | 342 |
| 19.5 | 351 |
| 20.0 | 360 |
| 22.0 | 396 |
| 25.0 | 450 |
| 28.0 | 504 |
| 30.0 | 540 |
| 33.3 | 599 |
| mg/dL | mmol/L |
|---|---|
| 40 | 2.2 |
| 50 | 2.8 |
| 60 | 3.3 |
| 70 | 3.9 |
| 80 | 4.4 |
| 90 | 5.0 |
| 100 | 5.6 |
| 110 | 6.1 |
| 120 | 6.7 |
| 130 | 7.2 |
| 140 | 7.8 |
| 150 | 8.3 |
| 160 | 8.9 |
| 170 | 9.4 |
| 180 | 10.0 |
| 190 | 10.6 |
| 200 | 11.1 |
| 210 | 11.7 |
| 220 | 12.2 |
| 230 | 12.8 |
| 240 | 13.3 |
| 250 | 13.9 |
| 260 | 14.4 |
| 270 | 15.0 |
| 280 | 15.6 |
| 290 | 16.1 |
| 300 | 16.7 |
| 350 | 19.4 |
| 400 | 22.2 |
| 500 | 27.8 |
| 600 | 33.3 |
Using a different unit from your doctor?
Readings from a meter set to the wrong unit look very strange: 110 where you expect 6.1, or 6.1 where you expect 110. If you move countries, read a guide written for another country or get a new meter, check which unit it uses. On many meters the unit is fixed by the manufacturer for the country where it is sold.
For target ranges in both units, see the blood sugar targets chart.
Make a log in your unitChoose mmol/L or mg/dL and print a log that fits how you test.Questions
How do I convert mmol/L to mg/dL?
Multiply by 18. For example, 6.5 mmol/L × 18 = 117 mg/dL.
How do I convert mg/dL to mmol/L?
Divide by 18. For example, 140 mg/dL ÷ 18 = 7.8 mmol/L.
Why 18?
One mmol of glucose weighs about 180 mg, and mg/dL counts per tenth of a litre, so 1 mmol/L is about 18 mg/dL. The exact factor is 18.016; the difference is too small to matter for meter readings.
Which countries use mmol/L and which use mg/dL?
The United States and several other countries use mg/dL. The UK, most of Europe, Canada and Australia use mmol/L. Use the same unit your meter shows.
Does this work for HbA1c?
No. HbA1c is measured in % or mmol/mol and needs a different formula. This converter is for blood glucose readings only.