Femtogram to Carat Converter
Unit Converter
Instant · Precise · Universal
34 units available
6 categories total
How to Convert Femtogram to Carat
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) = 5.000000e-15 Carat (ct).
Femtogram to Carat — Common Values
| Femtogram (fg) | Carat (ct) |
|---|---|
| 0.1 | 5.000000e-16 |
| 0.5 | 2.500000e-15 |
| 1 | 5.000000e-15 |
| 2 | 1.000000e-14 |
| 5 | 2.500000e-14 |
| 10 | 5.000000e-14 |
| 25 | 1.250000e-13 |
| 50 | 2.500000e-13 |
| 100 | 5.000000e-13 |
| 500 | 2.500000e-12 |
| 1000 | 5.000000e-12 |
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 Carat (ct)
Definition
The carat is a unit of mass used for gemstones and pearls, equal to exactly 200 milligrams (0.2 grams).
Mathematical Relationship
1 ct = 0.2 g = 200 mg = 0.007055 oz.
Conversion Formula
To convert carats to grams: multiply by 0.2. To convert grams to carats: multiply by 5.
Practical Applications
Diamond grading and pricing, gemstone trade, pearl classification, and jewelry appraisal.
Interesting Facts
The Hope Diamond weighs 45.52 ct (9.1 g). The Cullinan Diamond, the largest gem-quality rough diamond ever found, was 3,106 ct (621 g).
Common Mistakes
Confusing carat (ct, mass) with karat (K, gold purity). 24K gold is pure gold; a 24-carat diamond weighs 4.8 g.
Educational Tips
Carat = weight of a gem. Karat = purity of gold. They sound the same but measure completely different things.