How Many Grams in a Milligram?
0.001 g
1 milligram equals 0.001 gram; it takes 1,000 milligrams to make 1 gram.
Exact: 1 mg = 0.001 g
Milligrams to Grams conversion chart
| Milligrams | Grams |
|---|---|
| 1 mg | 0.001 |
| 2 mg | 0.002 |
| 5 mg | 0.005 |
| 10 mg | 0.01 |
| 20 mg | 0.02 |
| 25 mg | 0.025 |
| 50 mg | 0.05 |
| 100 mg | 0.1 |
| 150 mg | 0.15 |
| 200 mg | 0.2 |
| 250 mg | 0.25 |
| 300 mg | 0.3 |
| 400 mg | 0.4 |
| 500 mg | 0.5 |
| 600 mg | 0.6 |
| 750 mg | 0.75 |
| 800 mg | 0.8 |
| 1,000 mg | 1 |
| 1,500 mg | 1.5 |
| 2,000 mg | 2 |
| 2,500 mg | 2.5 |
| 5,000 mg | 5 |
How to convert milligrams to grams
grams = milligrams ÷ 1,000
Example: 500 mg ÷ 1,000 = 0.5 g.
Divide the milligrams by 1,000. The decimal point steps three places to the left: 1,200 mg is 1.2 g, 85 mg is 0.085 g, and 5 mg is 0.005 g.
A quick check on the zeros helps. Any answer under one gram needs a zero in front of the point, and each step down from hundreds to tens to single milligrams adds one more zero after it: 300 mg is 0.3 g, 30 mg is 0.03 g and 3 mg is 0.003 g.
To go the other way, multiply by the same number or use grams to milligrams.
What does the milli in milligram mean?
It means one thousandth. NIST's table of metric prefixes gives milli the symbol m and the meaning "thousandth", so a milligram is a thousandth of a gram in the same way a milliliter is a thousandth of a liter.
The shared prefix is also why mg and ml get confused. The prefix only says how small the unit is; the letter after it says what is being measured, g for weight and l for volume.
Is a milligram the same as a milliliter?
No. A milligram is a weight and a milliliter is a volume, so the two only line up for a known substance. For water, 1 ml weighs about 1,000 mg, which is a thousand times more than one milligram.
When a liquid's label gives milligrams per milliliter, that ratio, not a unit conversion, links the two numbers. For dry spoon measures, see milligrams to teaspoons, where the answer depends on the powder.
Milligrams and grams: questions
How many grams is 1,500 mg?
1,500 mg is 1.5 g: the point moves three places left, from 1500 to 1.5. Double it and you have 3 g. In ounces, the original amount is only 0.05291 oz.
How many grams is 50 mg?
50 mg is 0.05 g, five hundredths of a gram. Twenty portions of that size would make up a single gram. On a scale that reads to a hundredth of a gram, it shows as 0.05.
How many grams is 250 mg?
250 mg is 0.25 g, a quarter of a gram. Four of them make one gram, and eight make 2 g. In ounces, a quarter gram is a tiny 0.008818 oz.
How many grams is 10 mg?
10 mg is 0.01 g, one hundredth of a gram. A scale needs two decimal places in grams just to show it, and a hundred such amounts add up to one gram.
Which is bigger, 1 g or 100 mg?
1 g, ten times over. 100 mg is only 0.1 g, a tenth of a gram, so it would take ten of them to balance one gram on a scale.
Does the substance change the mg to g conversion?
No. Milligrams and grams both measure weight, so a gram of salt, sugar or anything else always holds 1,000 mg. The substance matters only when you switch to a volume, such as teaspoons or milliliters.
Related conversions
Sources: Unit definitions: NIST Handbook 44 · Last reviewed · Report an error
https://howmanyounces.com/milligrams-to-grams/