Gram → Milligram (g → mg)

g to mg direct conversion page with calculator, reverse conversion and comparison table.

1 g = 1000 mg
1 Gram (g) = 1000 Milligram (mg).


swap converter

If you want to reverse convert, use Milligram → Gram. 1 mg = 0.001 g. You can also explore the full Mass converter page for more cross conversions.

Conversion formula

Gram to Milligram formula: value in mg = value in g × 1000.

Milligram to Gram formula: value in g = value in mg × 0.001.

How to convert Gram to Milligram

To convert Gram to Milligram, multiply the value in g by 1000. This gives the result in mg.

For example, 1 g = 1000 mg and 10 g = 10000 mg.

What is Gram?

Gram (g): Useful for kitchen scales and small product quantities; one thousandth of a kilogram. 1 g = 1000 mg.

What is Milligram?

Milligram (mg): Describes small masses such as laboratory samples; a thousand times smaller than a gram. 1 mg = 0.001 g.

FAQ

How many milligram are in 1 gram?

There are 1000 mg in 1 g.

Why can conversion results differ slightly?

Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.

How do I convert gram to milligram?

Multiply the value in g by 1000 to get the value in mg.

Gram → other Mass units

Gram → Milligram Table

The table below shows common values from Gram to Milligram and the reverse direction for quick reference.

gmgRounded
1 g1000 mg1000.0000
2 g2000 mg2000.0000
3 g3000 mg3000.0000
4 g4000 mg4000.0000
5 g5000 mg5000.0000
10 g10000 mg10000.0000
12 g12000 mg12000.0000
15 g15000 mg15000.0000
20 g20000 mg20000.0000
25 g25000 mg25000.0000
30 g30000 mg30000.0000
40 g40000 mg40000.0000
50 g50000 mg50000.0000
75 g75000 mg75000.0000
100 g100000 mg100000.0000
200 g200000 mg200000.0000
250 g250000 mg250000.0000
500 g500000 mg500000.0000
750 g750000 mg750000.0000
1000 g1000000 mg1000000.0000
2500 g2500000 mg2500000.0000
5000 g5000000 mg5000000.0000
10000 g10000000 mg10000000.0000

Milligram → Gram Table

mggRounded
1 mg0.001 g0.0010
2 mg0.002 g0.0020
3 mg0.003 g0.0030
4 mg0.004 g0.0040
5 mg0.005 g0.0050
10 mg0.01 g0.0100
12 mg0.012 g0.0120
15 mg0.015 g0.0150
20 mg0.02 g0.0200
25 mg0.025 g0.0250
30 mg0.03 g0.0300
40 mg0.04 g0.0400
50 mg0.05 g0.0500
75 mg0.075 g0.0750
100 mg0.1 g0.1000
200 mg0.2 g0.2000
250 mg0.25 g0.2500
500 mg0.5 g0.5000
750 mg0.75 g0.7500
1000 mg1 g1.0000
2500 mg2.5 g2.5000
5000 mg5 g5.0000
10000 mg10 g10.0000

Milligram → Gram

The reverse value is 1 mg = 0.001 g.