Gram (g)
A gram is one thousandth of a kilogram — the everyday metric unit for small masses and recipe ingredients.
Grams appear on nutrition labels, jewelry scales, laboratory balances, and European cooking measurements.
Gram to Milligram
Convert gram to milligram instantly. Type in either field — results update live.
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Weight & Mass Gram Milligram
1 gram = 1,000 milligrams
Unit
Unit
Conversion table
Selected g values converted to mg using the exact factor from this tool.
| g | mg |
|---|---|
| 0.01 | 10 |
| 0.1 | 100 |
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 1,000 | 1,000,000.0000000001 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 g = 1000 mg
1 mg = 0.001 g
To convert gram to milligram, multiply by 1000.
To convert milligram to gram, multiply by 0.001.
Example: convert 15 g to mg
15 × 1000 = 15000 mg
About these units
Short background on the units used in this conversion.
Milligram (mg)
A milligram is one thousandth of a gram, used for very small masses such as medication dosages.
Milligrams are standard on prescription labels, supplement facts panels, and analytical chemistry.
Frequently asked questions
How many milligrams are in one gram?
One gram equals 1,000 milligrams. Multiply your grams value by 1,000 to convert to milligrams.
What is the conversion formula?
mg = g × 1,000The reverse is
g = mg × 0.001, using the same exact factors as this converter.Is this Gram to Milligram converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All gram conversions
Jump to any weight & mass conversion starting from gram — including the reverse direction and every other unit in our dataset.
milligram (mg) → gram (g)
gram (g) → kilogram (kg)gram (g) → microgram (µg)gram (g) → centigram (cg)gram (g) → decigram (dg)gram (g) → dekagram (dag)gram (g) → hectogram (hg)gram (g) → metric ton (tonne) (t)gram (g) → picogram (pg)gram (g) → nanogram (ng)gram (g) → femtogram (fg)gram (g) → attogram (ag)gram (g) → megagram (Mg)gram (g) → gigagram (Gg)gram (g) → teragram (Tg)gram (g) → petagram (Pg)gram (g) → exagram (Eg)gram (g) → pound (lb)gram (g) → ounce (oz)gram (g) → stone (st)gram (g) → short ton (us) (ton)gram (g) → long ton (uk) (long ton)gram (g) → hundredweight (us) (cwt)gram (g) → hundredweight (uk) (cwt-UK)gram (g) → quarter (us) (qr)gram (g) → dram (avoirdupois) (dr)gram (g) → grain (gr)gram (g) → sluggram (g) → troy ounce (oz t)gram (g) → dram (apothecary) (dr ap)gram (g) → troy pound (lb t)gram (g) → pennyweight (dwt)gram (g) → carat (ct)gram (g) → atomic mass unit (u)gram (g) → planck mass (mₚ)gram (g) → electron mass (mₑ)gram (g) → proton mass (mₚ⁺)gram (g) → neutron mass (mₙ)gram (g) → solar mass (M☉)gram (g) → earth mass (M⊕)gram (g) → quintal (q)gram (g) → mommegram (g) → cattygram (g) → piculgram (g) → arrobagram (g) → macegram (g) → baht (gold)gram (g) → talent (biblical)gram (g) → minagram (g) → shekel