Microgram to Femtogram Converter
Unit Converter
Instant · Precise · Universal
34 units available
6 categories total
How to Convert Microgram to Femtogram
To convert µg to mg: divide by 1,000. To convert µg to grams: divide by 1,000,000.
1 µg = 10⁻⁶ g = 10⁻⁹ kg = 0.001 mg = 1,000 ng.
For example, 1 Microgram (µg) = 1000000000 Femtogram (fg).
Microgram to Femtogram — Common Values
| Microgram (µg) | Femtogram (fg) |
|---|---|
| 0.1 | 100000000 |
| 0.5 | 500000000 |
| 1 | 1000000000 |
| 2 | 2000000000 |
| 5 | 5000000000 |
| 10 | 10000000000 |
| 25 | 25000000000 |
| 50 | 50000000000 |
| 100 | 100000000000 |
| 500 | 500000000000 |
| 1000 | 1.000000e+12 |
About Microgram (µg)
Definition
The microgram is a unit of mass equal to 10⁻⁶ grams or 10⁻⁹ kilograms — one millionth of a gram.
Mathematical Relationship
1 µg = 10⁻⁶ g = 10⁻⁹ kg = 0.001 mg = 1,000 ng.
Conversion Formula
To convert µg to mg: divide by 1,000. To convert µg to grams: divide by 1,000,000.
Practical Applications
Vitamin dosages (e.g., vitamin B12: 2.4 µg/day), drug formulations, and food additive regulations.
Interesting Facts
The recommended daily intake of vitamin D is 15 µg (600 IU) — an incredibly tiny yet vital amount for bone health.
Common Mistakes
Confusing µg with mg — a 1,000× error. In medicine, this can be life-threatening. Always double-check the prefix.
Educational Tips
In medical contexts, 'mcg' = 'µg'. If a prescription says '200 mcg', that's 0.2 mg or 0.0002 g.
About Femtogram (fg)
Definition
The femtogram is a unit of mass equal to 10⁻¹⁵ grams or 10⁻¹⁸ kilograms — one quadrillionth of a gram.
Mathematical Relationship
1 fg = 10⁻¹⁵ g = 10⁻¹⁸ kg = 1,000 ag.
Conversion Formula
To convert fg to kg: multiply by 10⁻¹⁸. To convert fg to pg: divide by 1,000.
Practical Applications
Expressing the mass of individual bacterial cells (~100 fg for E. coli) and subcellular components.
Interesting Facts
A single E. coli bacterium has a mass of about 600–700 fg. A single mitochondrion is roughly 1 fg.
Common Mistakes
Mixing up fg (femtogram) with fm (femtometer) — one is mass, the other is length.
Educational Tips
A bacterium weighs ~500 fg — this gives you a tangible anchor for the femtogram scale.