Mass per volume density.
Micrograms per Gallon to Picograms per Liter Converter — ug/gal to pg/L
Convert Microgram per Gallon (ug/gal) to Picogram per Liter (pg/L) using the exact conversion factor (1 microgram per gallon = 264,172.0524 picogram per liter). See the formula, worked examples, and conversion table.
Micrograms per Gallon to Picograms 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 2.64172052e-7 / 1e-12.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms per Gallon to Picograms per Liter
Microgram per Gallon and Picogram 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
picograms per liter = micrograms per gallon × 264172.052358
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram per gallon equals 2.641721e-7 base units, and 1 picogram per liter equals 1e-12 base units, so dividing one by the other gives the direct microgram per gallon-to-picogram per liter factor of 264172.052358.
Simple example
1 ug/gal × 264172.0524 = 264,172.0524 pg/L
1 microgram per gallon = 264,172.0524 picograms per liter.
Real-world example
1,000 ug/gal × 264172.0524 = 264,172,052.4 pg/L
1,000 micrograms per gallon = 264,172,052.4 picograms per liter.
Conversion table
| Microgram per Gallon (ug/gal) | Picogram per Liter (pg/L) |
|---|---|
| 0.1 ug/gal | 26,417.20524 pg/L |
| 1 ug/gal | 264,172.0524 pg/L |
| 10 ug/gal | 2,641,720.524 pg/L |
| 100 ug/gal | 26,417,205.24 pg/L |
| 1,000 ug/gal | 264,172,052.4 pg/L |
| 10,000 ug/gal | 2,641,720,524 pg/L |
Reverse conversion: Picogram per Liter to Microgram per Gallon
1 pg/L × 0.000003785411784 = 0.0000037854 ug/gal
1 picogram per liter = 0.0000037854 micrograms per gallon.
micrograms per gallon = picograms per liter × 0.000003785411784
For a page dedicated to this direction, see Picogram per Liter to Microgram per Gallon.
Understanding the Microgram per Gallon (ug/gal)
Mass per volume density.
Understanding the Picogram per Liter (pg/L)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many picograms per liter are in 1 microgram per gallon?
1 microgram per gallon equals 264,172.0524 picograms per liter, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per gallon to picogram per liter?
Multiply the microgram per gallon value by 264172.0524. The converter above does this instantly to whatever precision you set.
How do I convert picogram per liter back to microgram per gallon?
Use the reverse factor: 1 picogram per liter equals 0.0000037854 micrograms per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram per gallon?
Microgram per Gallon (ug/gal) is a unit of density.
What is a picogram per liter?
Picogram per Liter (pg/L) is a unit of density.
Is the microgram per gallon to picogram per liter conversion exact?
Yes. Both microgram per gallon and picogram per liter are defined by fixed standards rather than physical artifacts, so the factor of 264172.0524 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.