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Glucose converter

Turn a blood sugar from mg/dL into mmol/L, or the other way round, with the whole chart below.

Glucose in mmol/LExample

5.6mmol/L

In mg/dL: 100 mg/dL
In mmol/L: 5.6 mmol/L

See the working

mmol/L = mg/dL ÷ 18.016100 ÷ 18.016 = 5.55 mmol/L

A fasting glucose of about 70 to 99 mg/dL (3.9 to 5.5 mmol/L) is the usual range.

Read my glucose with my A1C and insulin.

Why there are two units

The US prints glucose in milligrams per decilitre (mg/dL). Most other countries use millimoles per litre (mmol/L), which counts molecules instead of weight. Same blood, same result, a different number.

To go from mg/dL to mmol/L, divide by 18. To go back, multiply by 18. The exact factor is 18.016, which is what this converter uses.

The numbers that matter

A fasting glucose of 70 to 99 mg/dL (3.9 to 5.5 mmol/L) is the usual range. 100 to 125 mg/dL (5.6 to 6.9 mmol/L) fasting is the range called prediabetes, and 126 mg/dL (7.0 mmol/L) or more on two tests is the range used for diabetes. Under 70 mg/dL (3.9 mmol/L) is low.

Glucose chart: mg/dL to mmol/L

Every glucose from 40 to 400 mg/dL in mmol/L (divide by 18.016).

mg/dL	mmol/L
40	2.2
41	2.3
42	2.3
43	2.4
44	2.4
45	2.5
46	2.6
47	2.6
48	2.7
49	2.7
50	2.8
51	2.8
52	2.9
53	2.9
54	3.0
55	3.1
56	3.1
57	3.2
58	3.2
59	3.3
60	3.3
61	3.4
62	3.4
63	3.5
64	3.6
65	3.6
66	3.7
67	3.7
68	3.8
69	3.8
70	3.9
71	3.9
72	4.0
73	4.1
74	4.1
75	4.2
76	4.2
77	4.3
78	4.3
79	4.4
80	4.4
81	4.5
82	4.6
83	4.6
84	4.7
85	4.7
86	4.8
87	4.8
88	4.9
89	4.9
90	5.0
91	5.1
92	5.1
93	5.2
94	5.2
95	5.3
96	5.3
97	5.4
98	5.4
99	5.5
100	5.6
101	5.6
102	5.7
103	5.7
104	5.8
105	5.8
106	5.9
107	5.9
108	6.0
109	6.1
110	6.1
111	6.2
112	6.2
113	6.3
114	6.3
115	6.4
116	6.4
117	6.5
118	6.5
119	6.6
120	6.7
121	6.7
122	6.8
123	6.8
124	6.9
125	6.9
126	7.0
127	7.0
128	7.1
129	7.2
130	7.2
131	7.3
132	7.3
133	7.4
134	7.4
135	7.5
136	7.5
137	7.6
138	7.7
139	7.7
140	7.8
141	7.8
142	7.9
143	7.9
144	8.0
145	8.0
146	8.1
147	8.2
148	8.2
149	8.3
150	8.3
151	8.4
152	8.4
153	8.5
154	8.5
155	8.6
156	8.7
157	8.7
158	8.8
159	8.8
160	8.9
161	8.9
162	9.0
163	9.0
164	9.1
165	9.2
166	9.2
167	9.3
168	9.3
169	9.4
170	9.4
171	9.5
172	9.5
173	9.6
174	9.7
175	9.7
176	9.8
177	9.8
178	9.9
179	9.9
180	10.0
181	10.0
182	10.1
183	10.2
184	10.2
185	10.3
186	10.3
187	10.4
188	10.4
189	10.5
190	10.5
191	10.6
192	10.7
193	10.7
194	10.8
195	10.8
196	10.9
197	10.9
198	11.0
199	11.0
200	11.1
201	11.2
202	11.2
203	11.3
204	11.3
205	11.4
206	11.4
207	11.5
208	11.5
209	11.6
210	11.7
211	11.7
212	11.8
213	11.8
214	11.9
215	11.9
216	12.0
217	12.0
218	12.1
219	12.2
220	12.2
221	12.3
222	12.3
223	12.4
224	12.4
225	12.5
226	12.5
227	12.6
228	12.7
229	12.7
230	12.8
231	12.8
232	12.9
233	12.9
234	13.0
235	13.0
236	13.1
237	13.2
238	13.2
239	13.3
240	13.3
241	13.4
242	13.4
243	13.5
244	13.5
245	13.6
246	13.7
247	13.7
248	13.8
249	13.8
250	13.9
251	13.9
252	14.0
253	14.0
254	14.1
255	14.2
256	14.2
257	14.3
258	14.3
259	14.4
260	14.4
261	14.5
262	14.5
263	14.6
264	14.7
265	14.7
266	14.8
267	14.8
268	14.9
269	14.9
270	15.0
271	15.0
272	15.1
273	15.2
274	15.2
275	15.3
276	15.3
277	15.4
278	15.4
279	15.5
280	15.5
281	15.6
282	15.7
283	15.7
284	15.8
285	15.8
286	15.9
287	15.9
288	16.0
289	16.0
290	16.1
291	16.2
292	16.2
293	16.3
294	16.3
295	16.4
296	16.4
297	16.5
298	16.5
299	16.6
300	16.7
301	16.7
302	16.8
303	16.8
304	16.9
305	16.9
306	17.0
307	17.0
308	17.1
309	17.2
310	17.2
311	17.3
312	17.3
313	17.4
314	17.4
315	17.5
316	17.5
317	17.6
318	17.7
319	17.7
320	17.8
321	17.8
322	17.9
323	17.9
324	18.0
325	18.0
326	18.1
327	18.2
328	18.2
329	18.3
330	18.3
331	18.4
332	18.4
333	18.5
334	18.5
335	18.6
336	18.7
337	18.7
338	18.8
339	18.8
340	18.9
341	18.9
342	19.0
343	19.0
344	19.1
345	19.1
346	19.2
347	19.3
348	19.3
349	19.4
350	19.4
351	19.5
352	19.5
353	19.6
354	19.6
355	19.7
356	19.8
357	19.8
358	19.9
359	19.9
360	20.0
361	20.0
362	20.1
363	20.1
364	20.2
365	20.3
366	20.3
367	20.4
368	20.4
369	20.5
370	20.5
371	20.6
372	20.6
373	20.7
374	20.8
375	20.8
376	20.9
377	20.9
378	21.0
379	21.0
380	21.1
381	21.1
382	21.2
383	21.3
384	21.3
385	21.4
386	21.4
387	21.5
388	21.5
389	21.6
390	21.6
391	21.7
392	21.8
393	21.8
394	21.9
395	21.9
396	22.0
397	22.0
398	22.1
399	22.1
400	22.2

Glucose chart: mmol/L to mg/dL

Every glucose from 2.0 to 25.0 mmol/L in mg/dL (multiply by 18.016).

mmol/L	mg/dL
2.0	36
2.1	38
2.2	40
2.3	41
2.4	43
2.5	45
2.6	47
2.7	49
2.8	50
2.9	52
3.0	54
3.1	56
3.2	58
3.3	59
3.4	61
3.5	63
3.6	65
3.7	67
3.8	68
3.9	70
4.0	72
4.1	74
4.2	76
4.3	77
4.4	79
4.5	81
4.6	83
4.7	85
4.8	86
4.9	88
5.0	90
5.1	92
5.2	94
5.3	95
5.4	97
5.5	99
5.6	101
5.7	103
5.8	104
5.9	106
6.0	108
6.1	110
6.2	112
6.3	114
6.4	115
6.5	117
6.6	119
6.7	121
6.8	123
6.9	124
7.0	126
7.1	128
7.2	130
7.3	132
7.4	133
7.5	135
7.6	137
7.7	139
7.8	141
7.9	142
8.0	144
8.1	146
8.2	148
8.3	150
8.4	151
8.5	153
8.6	155
8.7	157
8.8	159
8.9	160
9.0	162
9.1	164
9.2	166
9.3	168
9.4	169
9.5	171
9.6	173
9.7	175
9.8	177
9.9	178
10.0	180
10.1	182
10.2	184
10.3	186
10.4	187
10.5	189
10.6	191
10.7	193
10.8	195
10.9	196
11.0	198
11.1	200
11.2	202
11.3	204
11.4	205
11.5	207
11.6	209
11.7	211
11.8	213
11.9	214
12.0	216
12.1	218
12.2	220
12.3	222
12.4	223
12.5	225
12.6	227
12.7	229
12.8	231
12.9	232
13.0	234
13.1	236
13.2	238
13.3	240
13.4	241
13.5	243
13.6	245
13.7	247
13.8	249
13.9	250
14.0	252
14.1	254
14.2	256
14.3	258
14.4	259
14.5	261
14.6	263
14.7	265
14.8	267
14.9	268
15.0	270
15.1	272
15.2	274
15.3	276
15.4	277
15.5	279
15.6	281
15.7	283
15.8	285
15.9	286
16.0	288
16.1	290
16.2	292
16.3	294
16.4	295
16.5	297
16.6	299
16.7	301
16.8	303
16.9	304
17.0	306
17.1	308
17.2	310
17.3	312
17.4	313
17.5	315
17.6	317
17.7	319
17.8	321
17.9	322
18.0	324
18.1	326
18.2	328
18.3	330
18.4	331
18.5	333
18.6	335
18.7	337
18.8	339
18.9	341
19.0	342
19.1	344
19.2	346
19.3	348
19.4	350
19.5	351
19.6	353
19.7	355
19.8	357
19.9	359
20.0	360
20.1	362
20.2	364
20.3	366
20.4	368
20.5	369
20.6	371
20.7	373
20.8	375
20.9	377
21.0	378
21.1	380
21.2	382
21.3	384
21.4	386
21.5	387
21.6	389
21.7	391
21.8	393
21.9	395
22.0	396
22.1	398
22.2	400
22.3	402
22.4	404
22.5	405
22.6	407
22.7	409
22.8	411
22.9	413
23.0	414
23.1	416
23.2	418
23.3	420
23.4	422
23.5	423
23.6	425
23.7	427
23.8	429
23.9	431
24.0	432
24.1	434
24.2	436
24.3	438
24.4	440
24.5	441
24.6	443
24.7	445
24.8	447
24.9	449
25.0	450

Questions

How do I convert mg/dL to mmol/L?

Divide by 18 (exactly 18.016). 100 mg/dL is 5.6 mmol/L.

How do I convert mmol/L to mg/dL?

Multiply by 18. 7.0 mmol/L is 126 mg/dL.

Is 5.5 mmol/L normal?

As a fasting glucose, yes: 5.5 mmol/L is 99 mg/dL, the top of the usual fasting range.

Does the factor change for a glucose meter or sensor?

No. The conversion is the same for lab tests, meters and sensors.

Sources

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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