mL to mg Converter | Milliliters to Milligrams

1 milliliter = 1,000 milligrams for water (density 1 g/ml). Multiply milliliters by 1,000; other substances need their own density.

1,000
milligrams → milliliters Formula: mg = ml × 1,000
Quick: 1 ml 5 ml 10 ml 20 ml 50 ml 100 ml

milliliters to milligrams conversion table

millilitersmilligrams
1 ml 1,000 mg
2 ml 2,000 mg
3 ml 3,000 mg
4 ml 4,000 mg
5 ml 5,000 mg
6 ml 6,000 mg
7 ml 7,000 mg
8 ml 8,000 mg
millilitersmilligrams
9 ml 9,000 mg
10 ml 10,000 mg
20 ml 20,000 mg
50 ml 50,000 mg
100 ml 100,000 mg
500 ml 500,000 mg
1,000 ml 1,000,000 mg

How to convert milliliters to milligrams

Step 1

Take the value in milliliters.

10 ml

Step 2

Multiply by 1,000.

10 × 1,000

Step 3

Round to the precision you need.

= 10,000 mg

Mass and volume only convert through density. This page assumes water; oil, flour or honey give different results.

Table of Contents

Volume to mass needs a density

A millilitre is a volume, one thousandth of a litre and the same as a cubic centimetre. A milligram is a mass, one thousandth of a gram. To turn a volume into a mass you multiply by density, the mass of one millilitre of the substance. The converter above uses water, whose density is 1 gram per millilitre for every practical purpose, so 1 ml = 1000 mg. Ten millilitres of water weigh 10,000 mg, which is 10 g.

Other liquids weigh more or less

Milk is about 1.03 g/ml, so 1 ml of milk is roughly 1,030 mg. Honey is about 1.42 g/ml, so a 5 ml teaspoon of honey is around 7,100 mg. Olive oil is lighter at about 0.92 g/ml, so 1 ml of oil is about 920 mg. Multiply the volume in millilitres by the density in mg/ml to get the mass; the water answer is only a starting point for liquids close to water.

Medicines are labelled by concentration

A liquid medicine states how much active ingredient each millilitre carries, for example 250 mg/5 ml, which is 50 mg per ml. To find how much active ingredient is in a measured volume, multiply the volume by that concentration: 4 ml of a 50 mg/ml suspension contains 200 mg. The density of the liquid is irrelevant here; the label concentration is the only figure that applies to a dose.

What is a milliliter?

A milliliter (abbreviated as "ml" or "mL") is a unit of volume in the metric system, equal to one-thousandth of a liter or 0.001 liters. It is commonly used to measure liquids in cooking, science, and medicine.

What is a milligram?

A milligram (abbreviated as "mg") is a unit of mass in the metric system, equal to one-thousandth of a gram or 0.001 grams. It is commonly used to measure small quantities such as medicine dosages or nutritional values.

Common milliliters to milligrams conversions

-2 ml → -2,000 mg -1.8 ml → -1,800 mg -1.7 ml → -1,700 mg -1.6 ml → -1,600 mg -1.4 ml → -1,400 mg -0.9 ml → -900 mg -0.8 ml → -800 mg -0.6 ml → -600 mg -0.4 ml → -400 mg -0.3 ml → -300 mg -0.1 ml → -100 mg 0.1 ml → 100 mg 0.2 ml → 200 mg 0.25 ml → 250 mg 0.3 ml → 300 mg 0.4 ml → 400 mg 0.5 ml → 500 mg 0.6 ml → 600 mg 0.61 ml → 610 mg 0.7 ml → 700 mg 0.73 ml → 730 mg 0.75 ml → 750 mg 0.78 ml → 780 mg 0.8 ml → 800 mg

These are the values people actually search for. Any other number works in the converter above; only these pages are listed for search engines.

Frequently asked questions

How many mg are in 1 ml?
For water, 1 ml = 1000 mg. For other substances multiply 1 ml by the density in mg/ml: about 1,030 mg for milk, about 920 mg for olive oil.
Is 5 ml equal to 5,000 mg?
For water, yes: 5 ml of water weighs 5,000 mg, which is 5 g. A denser liquid weighs more and a lighter one less.
How do I convert ml to mg for a medicine?
Multiply the volume by the concentration on the label. 2.5 ml of a 250 mg/5 ml syrup contains 2.5 × 50 = 125 mg of active ingredient.
What is 10 ml in mg?
10 ml of water is 10,000 mg, or 10 g. For another liquid multiply 10 by its density in mg/ml.
Why is the ml to mg answer different for oil and honey?
Because they have different densities. One millilitre of honey weighs about 1,420 mg and one millilitre of oil about 920 mg, while one millilitre of water weighs 1,000 mg.

Related converters

milliliters → Liters1 ml = 0.001 l milliliters → Gallons1 ml = 0.00026417 gal milliliters → cups1 ml = 0.00416667 cup milliliters → Pints1 ml = 0.00211338 pt milliliters → Quarts1 ml = 0.00105669 qt milliliters → fluid ounces1 ml = 0.0338141 floz
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