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Single conversion
To convert from Milligram (mg) to Gram (g), use the following formula:
Let's convert 5 Milligram (mg) to Gram (g).
Using the formula:
Therefore, 5 Milligram (mg) is equal to Gram (g).
Here are some quick reference conversions from Milligram (mg) to Gram (g):
| Milligrams | Grams |
|---|---|
| 0.000001 mg | g |
| 0.001 mg | g |
| 0.1 mg | g |
| 1 mg | g |
| 2 mg | g |
| 3 mg | g |
| 4 mg | g |
| 5 mg | g |
| 6 mg | g |
| 7 mg | g |
| 8 mg | g |
| 9 mg | g |
| 10 mg | g |
| 20 mg | g |
| 30 mg | g |
| 40 mg | g |
| 50 mg | g |
| 100 mg | g |
| 1000 mg | g |
| 10000 mg | g |
For all Weight converters, choose units using the From/To dropdowns above.
A milligram, abbreviated as mg, is a tiny unit of mass in the metric system.
It's equal to one-thousandth of a gram (0.001 g). While incredibly small, the milligram plays a massive role in our daily health, from the medicine we take to the food we eat.
The milligram (mg) is a critical unit of measurement for quantifying the active ingredients in medications. Its small size allows for the precise dosage needed to make a drug effective and safe.
Why is dosage in mg so important?
You'll see milligram (mg) dosages clearly listed on standard medications, such as aspirin, ibuprofen, and prescription pills.
When you read a nutrition facts label, you'll see many vitamins and minerals listed in milligrams (mg).
Essential nutrients like Vitamin C, iron, calcium, and sodium are all measured in mg to help you understand your daily intake. For example, the recommended daily allowance of Vitamin C for an adult is around 75-90 mg. Understanding these measurements is key to maintaining a balanced and healthy diet.
It can be difficult to picture just how small a milligram is. Here's a simple way to visualize it:
The name itself gives a clue: it combines the Latin prefix "milli" (meaning "thousandth") with the base unit, gram. This means there are 1,000 milligrams in one gram.
A gram (g) is a base unit of mass in the metric system. The plural form is grams.
The gram was initially defined in 1795 by the French National Convention.
Its first definition was based on the mass of one cubic centimeter of pure water at the temperature of its maximum density, which is approximately 4 degrees Celsius (4 °C).
This practical, water-based definition was a revolutionary step toward a standardized and universal system of measurement, moving away from the inconsistent and often confusing units of time.
A gram is much smaller than an ounce, the standard unit of mass in the imperial and US customary systems.
One ounce equals approximately 28.35 grams, which is why grams are preferred for scientific work and for measuring small amounts, such as spices or medicine.
The metric system's decimal structure (for example, 1,000 grams in a kilogram) also makes calculations simpler than in the imperial system.
Although the gram was once tied to water, it's no longer linked to any physical object.
Since 2019, the kilogram — and therefore the gram — is defined by a fundamental constant, the Planck constant (h).
That shift makes the unit stable and reproducible in any properly equipped laboratory, without relying on the old International Prototype of the Kilogram.