Milligrams to Grams Converter

How to convert milligrams to grams

grams = milligrams ÷ 1,000

1 milligram is one thousandth of a gram. 1 gram is one thousandth of a kilogram.

The factor is exact in both directions: 1 mg = 0.001 g and 1 g = 1,000 mg. Nothing is rounded until you choose how many decimals to show.

Worked example: 250 mg

1. Start with the value in milligrams: 250 mg.
2. Divide by 1,000, because 1 gram = 1,000 milligrams: 250 ÷ 1,000 = 0.25 g.

Milligrams to grams chart

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Milligrams from 10 to 1,000 converted to grams with the exact factor, shown to five significant digits.

Milligrams to grams, part 1 of 4

mg	g
10	0.01
20	0.02
30	0.03
40	0.04
50	0.05
60	0.06
70	0.07
80	0.08
90	0.09
100	0.1
110	0.11
120	0.12
130	0.13
140	0.14
150	0.15
160	0.16
170	0.17
180	0.18
190	0.19
200	0.2
210	0.21
220	0.22
230	0.23
240	0.24
250	0.25

Milligrams to grams, part 2 of 4

mg	g
260	0.26
270	0.27
280	0.28
290	0.29
300	0.3
310	0.31
320	0.32
330	0.33
340	0.34
350	0.35
360	0.36
370	0.37
380	0.38
390	0.39
400	0.4
410	0.41
420	0.42
430	0.43
440	0.44
450	0.45
460	0.46
470	0.47
480	0.48
490	0.49
500	0.5

Milligrams to grams, part 3 of 4

mg	g
510	0.51
520	0.52
530	0.53
540	0.54
550	0.55
560	0.56
570	0.57
580	0.58
590	0.59
600	0.6
610	0.61
620	0.62
630	0.63
640	0.64
650	0.65
660	0.66
670	0.67
680	0.68
690	0.69
700	0.7
710	0.71
720	0.72
730	0.73
740	0.74
750	0.75

Milligrams to grams, part 4 of 4

mg	g
760	0.76
770	0.77
780	0.78
790	0.79
800	0.8
810	0.81
820	0.82
830	0.83
840	0.84
850	0.85
860	0.86
870	0.87
880	0.88
890	0.89
900	0.9
910	0.91
920	0.92
930	0.93
940	0.94
950	0.95
960	0.96
970	0.97
980	0.98
990	0.99
1,000	1

grams = milligrams ÷ 1,000. Factors: BIPM SI Brochure. unitcheck.net/weight/milligrams-to-grams/

Going the other way? Use the Grams to Milligrams converter.