Grams (g) to Micrograms (μg) Converter
Enter a value to instantly convert between weight units.
1 Gram = 1000000 Microgram
Key Formulas
Kilogram → Pound
lb = kg × 2.20462Pound → Kilogram
kg = lb × 0.453592Gram → Ounce
oz = g × 0.035274Ounce → Gram
g = oz × 28.3495Formula
μg = g × 1000000A microgram is one-millionth of a gram — about the weight of a small bacteria. It's the working unit for pharmaceutical compounds, clinical measurements, and trace environmental analysis. Hormone levels, drug concentrations, and micronutrient amounts are typically reported in micrograms. Converting from grams means multiplying by a million, which is only necessary when aggregating or scaling up trace amounts.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A clinical lab preparing a 1 mg/L standard needs to know that 0.001 g = 1000 μg for the solution calculation.
0.001 g = 1000 μg
A vitamin B12 supplement containing 0.5 g of extract — that's 500,000 μg for the label.
0.5 g = 500000 μg
An environmental soil sample contains 10 mg of lead per kg — 0.01 g = 10,000 μg for the contamination report.
0.01 g = 10000 μg
A pharmacological study uses 2 mg of a compound — 0.002 g = 2000 μg for the dose calculation.
0.002 g = 2000 μg