mg to g Converter
Enter an amount in milligrams to get grams -- an exact divide-by-1,000 conversion, with a reference table at common values.
Grams
0.500 g
Reference table at common values
| mg | g |
|---|---|
| 50 | 0.050 |
| 100 | 0.100 |
| 250 | 0.250 |
| 500 | 0.500 |
| 1,000 | 1.000 |
| 2,500 | 2.500 |
| 5,000 | 5.000 |
| 10,000 | 10.000 |
The formula
Like mcg to mg, this stays entirely within mass units -- no density or concentration needed, exact by definition of the metric prefixes:
g = mg ÷ 1,000
Worked example
The calculator's own default: 500 mg ÷ 1,000 = 0.500 g.
Converting the step below instead -- mcg to mg? mcg to mg Converter. Need grams converted into a volume instead of just a smaller mass unit? Use the ml to Grams Converter in reverse, or the Grams to ml Converter directly.
Frequently Asked Questions
How many mg is 1 gram?
1 gram is exactly 1,000 mg -- "milli-" means one thousandth of the gram, the SI base unit for mass here, so this ratio is exact by definition rather than measured or rounded.
How many mg is 500 mg in grams?
500 mg is exactly 0.5 g -- half of 1,000 mg. Use the calculator above for any other amount, or the reference table below for common values.
Why do some labels use mg and others use g for the same kind of ingredient?
It's mostly about keeping the printed number a convenient size: an amount in the hundreds or low thousands of milligrams is often written in mg (avoiding an awkward decimal), while a larger amount is written in whole or fractional grams. The underlying quantity of the substance is identical either way.
Is this the same kind of conversion as ml to grams?
No -- ml to grams needs a density, because it's converting between two different physical quantities (volume and mass). mg to g stays within mass the whole time, so it's a fixed, exact metric-prefix conversion with nothing to look up.
These are conversions, not measurements -- a density or concentration you enter or pick determines the answer, and real ingredients and products vary by brand. Nothing here is medical, dosing or pharmacist advice; confirm any medicine amount against the actual product label and your pharmacist or prescriber. See the Terms.