Grams to milligrams converter

Convert grams (g) to milligrams (mg).

Mass converter

Instant conversion

Edit either value. Decimals and scientific notation supported.

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Measurement format

From unit

To value

Measurement format

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CONVERSION

1 g ≈ 1000 mg

Display precision

Precision changes displayed rounding, not calculation accuracy.

FORMULAmg = g × 1000

FORMULA & EXAMPLES

How to convert Grams to milligrams

mg = g × 1000

Multiply the g reading by 1000.

Worked examples

250 g ≈ 250000 mg

250 × 1000 ≈ 250000

1000 g ≈ 1000000 mg

1000 × 1000 ≈ 1000000

Grams to milligrams table

Fixed reference · Gram to Milligram

Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.

Gram (g)	Milligram (mg)
0	0
0.1	100
0.5	500
1	1000
2	2000
5	5000
10	10000
25	25000
50	50000
100	100000
1000	1000000

Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.

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