Grams to Micrograms Converter
Enter the weight in grams below to convert it to micrograms.
Convert Grams to Micrograms
Enter a value in grams (g) to convert to micrograms (µg).
Gram to Microgram Conversion Table
Table showing various gram measurements converted to micrograms. Click any preset value or arrow to load it into the converter.
How to Convert Grams to Micrograms
To convert grams to micrograms, multiply the weight by the following conversion ratio: 1,000,000 micrograms/gram.
Since one gram is equal to 1,000,000 micrograms, you can use this simple formula to convert:
The weight in micrograms is equal to the weight in grams multiplied by 1,000,000.
For example, here's how to convert 5 grams to micrograms using the formula above.
How Many Micrograms Are in a Gram?
There are 1,000,000 micrograms in a gram, which is why we use this value in the formula above.
Our gram to microgram calculator automatically converts your weight measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Grams and micrograms are both units used to measure weight. Keep reading to learn more about each unit.
What Is a Gram?
A gram is a unit of weight equal to 1/1,000 of a kilogram (0.001 kg). Metric unit equal to one-thousandth of a kilogram (0.001 kg). [1]
The gram is classified as a metric and SI-compatible unit of weight. Grams can be abbreviated as g; for example, 1 gram can be written as 1 g.
When working with grams (g) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, grams (g) are widely used across fine-tolerance laboratory, analytical, and micro-scale weight measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Microgram?
A microgram is a unit of weight equal to 1/1,000,000,000 of a kilogram (1e-9 kg). One-millionth of a gram (10⁻⁹ kg). [2]
The microgram is classified as a metric and SI-compatible unit of weight. Micrograms can be abbreviated as µg; for example, 1 microgram can be written as 1 µg.
In the metric system, "micro" is the standard SI prefix for millionths, or 10⁻⁶. This makes the microgram (µg) a convenient decimal multiple of the gram (g).
In practice, micrograms (µg) are widely used across fine-tolerance laboratory, analytical, and micro-scale weight measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting weight between grams (g) and micrograms (µg), keep full floating-point precision (1 g = 1,000,000 µg; 1 µg = 0.000001 g) during intermediate calculations and round only the final microgram figure to match your instrument tolerance.
More Gram & Microgram Conversions
Need to calculate in the opposite direction? Use our micrograms to grams converter (µg to g) to switch your starting unit immediately. You can also explore related tools such as converting milligrams to micrograms, converting grams to ounces, or converting grams to kilograms.
Convert from Grams
Weight and volume require ingredient density (g/mL). Choose a USDA FoodData Central verified ingredient below:
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Mass)·Mass & Weight Metrology Standard — Grams (g) to Micrograms (µg)
- [2]NIST HB 44 SpecificationNIST HB 44 (NIST Handbook 44 (Current Ed.))·Unit Specifications: Gram (g) & Microgram (µg)
- [3]BIPM ReferenceBIPM (SI Base Unit: Kilogram (kg))·Conversion Factors & Mathematical Basis (g to µg)