Mass per volume density.
Picograms per Liter to Carats per Liter Converter — pg/L to ct/L
Convert Picogram per Liter (pg/L) to Carat per Liter (ct/L) using the exact conversion factor (1 picogram per liter = 5e-12 carat per liter). See the formula, worked examples, and conversion table.
Picograms per Liter to Carats per Liter converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 1e-12 / 0.2.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Picograms per Liter to Carats per Liter
Picogram per Liter and Carat per Liter both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
carats per liter = picograms per liter × 5e-12
This factor comes from each unit's defined relationship to the category's base unit: 1 picogram per liter equals 1e-12 base units, and 1 carat per liter equals 0.2 base units, so dividing one by the other gives the direct picogram per liter-to-carat per liter factor of 5e-12.
Simple example
1 pg/L × 5e-12 = 5e-12 ct/L
1 picogram per liter = 5e-12 carats per liter.
Real-world example
1,000 pg/L × 5e-12 = 5e-9 ct/L
1,000 picograms per liter = 5e-9 carats per liter.
Conversion table
| Picogram per Liter (pg/L) | Carat per Liter (ct/L) |
|---|---|
| 0.1 pg/L | 5e-13 ct/L |
| 1 pg/L | 5e-12 ct/L |
| 10 pg/L | 5e-11 ct/L |
| 100 pg/L | 5e-10 ct/L |
| 1,000 pg/L | 5e-9 ct/L |
| 10,000 pg/L | 5e-8 ct/L |
Reverse conversion: Carat per Liter to Picogram per Liter
5e-12 ct/L × 200000000000 = 1 pg/L
5e-12 carats per liter = 1 picogram per liter.
picograms per liter = carats per liter × 200000000000
For a page dedicated to this direction, see Carat per Liter to Picogram per Liter.
Understanding the Picogram per Liter (pg/L)
Mass per volume density.
Understanding the Carat per Liter (ct/L)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per liter are in 1 picogram per liter?
1 picogram per liter equals 5e-12 carats per liter, using the exact defined conversion factor rather than an estimate.
How do I convert picogram per liter to carat per liter?
Multiply the picogram per liter value by 5e-12. The converter above does this instantly to whatever precision you set.
How do I convert carat per liter back to picogram per liter?
Use the reverse factor: 1 carat per liter equals 200,000,000,000 picograms per liter. You can also use the swap control in the converter above to flip the direction instantly.
What is a picogram per liter?
Picogram per Liter (pg/L) is a unit of density.
What is a carat per liter?
Carat per Liter (ct/L) is a unit of density.
Is the picogram per liter to carat per liter conversion exact?
Yes. Both picogram per liter and carat per liter are defined by fixed standards rather than physical artifacts, so the factor of 5e-12 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.