A gram (g) is a fundamental unit of mass in the metric system. It's widely used across the globe in everyday life, science, medicine, and commerce. One gram is defined as one-thousandth of a kilogram and is roughly equal to the weight of a standard paperclip or a small raisin.
The gram was introduced in France in the late 18th century during the development of the metric system. It was originally defined as the mass of one cubic centimeter of water at 4°C. Today, it's standardized based on the kilogram and remains part of the International System of Units (SI). The metric system's simplicity and global acceptance make the gram a common unit of measurement in most countries.
How Is the Gram Used: The gram is used in many areas of daily life and professional work. You'll see it often in:
The gram strikes a balance between small-scale precision and practical everyday use, making it one of the most recognized and relied-upon units in the world.
A microgram (mcg) is a metric unit of mass equal to one-millionth of a gram. It’s one of the smallest standard units of mass, commonly used in medical, nutritional, and scientific settings where extremely small quantities matter.
The term comes from the Greek word mikros meaning “small” and “gram,” the base metric unit for mass. Its official SI symbol is µg. However, in medical practice especially in the U.S. mcg is used to prevent confusion with mg (milligram), which is 1,000 times larger.
How Is Microgram Used?
1 g = 1,000,000 µg
Let’s say you want to convert 100 g to µg.
Using the formula:
100 × 1,000,000 = 100,000,000 µg
So, 100 g is approximately 100,000,000 µg.
| Gram (g) | Microgram (µg) |
|---|---|
| 1 g | 1,000,000 µg |
| 2 g | 2,000,000 µg |
| 3 g | 3,000,000 µg |
| 4 g | 4,000,000 µg |
| 5 g | 5,000,000 µg |
| 6 g | 6,000,000 µg |
| 7 g | 7,000,000 µg |
| 8 g | 8,000,000 µg |
| 9 g | 9,000,000 µg |
| 10 g | 10,000,000 µg |
| 11 g | 11,000,000 µg |
| 12 g | 12,000,000 µg |
| 13 g | 13,000,000 µg |
| 14 g | 14,000,000 µg |
| 15 g | 15,000,000 µg |