Femtogram to Centigram Converter
Unit Converter
Instant · Precise · Universal
34 units available
6 categories total
How to Convert Femtogram to Centigram
To convert fg to kg: multiply by 10⁻¹⁸. To convert fg to pg: divide by 1,000.
1 fg = 10⁻¹⁵ g = 10⁻¹⁸ kg = 1,000 ag.
For example, 1 Femtogram (fg) = 1.000000e-13 Centigram (cg).
Femtogram to Centigram — Common Values
| Femtogram (fg) | Centigram (cg) |
|---|---|
| 0.1 | 1.000000e-14 |
| 0.5 | 5.000000e-14 |
| 1 | 1.000000e-13 |
| 2 | 2.000000e-13 |
| 5 | 5.000000e-13 |
| 10 | 1.000000e-12 |
| 25 | 2.500000e-12 |
| 50 | 5.000000e-12 |
| 100 | 1.000000e-11 |
| 500 | 5.000000e-11 |
| 1000 | 1.000000e-10 |
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.
About Centigram (cg)
Definition
The centigram is a unit of mass equal to one hundredth of a gram (10⁻² g) or 10 milligrams.
Mathematical Relationship
1 cg = 0.01 g = 10 mg = 10,000 µg.
Conversion Formula
To convert cg to mg: multiply by 10. To convert cg to grams: divide by 100.
Practical Applications
Occasionally used in older pharmaceutical and chemical references. Most modern use has shifted to mg.
Interesting Facts
The centigram is one of the least-used metric prefixed mass units, overshadowed by the more practical milligram.
Common Mistakes
Because it's so rarely used, people may not recognize 'cg' — convert to mg for clarity in communication.
Educational Tips
Centi = hundredth: just as 1 cm = 0.01 m, 1 cg = 0.01 g. The pattern is consistent across all SI units.