Mass per volume density.
Micrograms per Liter to Picograms per Gallon Converter — ug/L to pg/gal
Convert Microgram per Liter (ug/L) to Picogram per Gallon (pg/gal) using the exact conversion factor (1 microgram per liter = 3,785,411.784 picogram per gallon). See the formula, worked examples, and conversion table.
Micrograms per Liter to Picograms per Gallon 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-6 / 2.64172052e-13.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms per Liter to Picograms per Gallon
Microgram per Liter and Picogram per Gallon 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 gallon = micrograms per liter × 3785411.784
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram per liter equals 0.000001 base units, and 1 picogram per gallon equals 2.641721e-13 base units, so dividing one by the other gives the direct microgram per liter-to-picogram per gallon factor of 3785411.784.
Simple example
1 ug/L × 3785411.784 = 3,785,411.784 pg/gal
1 microgram per liter = 3,785,411.784 picograms per gallon.
Real-world example
1,000 ug/L × 3785411.784 = 3,785,411,784 pg/gal
1,000 micrograms per liter = 3,785,411,784 picograms per gallon.
Conversion table
| Microgram per Liter (ug/L) | Picogram per Gallon (pg/gal) |
|---|---|
| 0.1 ug/L | 378,541.1784 pg/gal |
| 1 ug/L | 3,785,411.784 pg/gal |
| 10 ug/L | 37,854,117.84 pg/gal |
| 100 ug/L | 378,541,178.4 pg/gal |
| 1,000 ug/L | 3,785,411,784 pg/gal |
| 10,000 ug/L | 37,854,117,840 pg/gal |
Reverse conversion: Picogram per Gallon to Microgram per Liter
1 pg/gal × 2.641721e-7 = 2.641721e-7 ug/L
1 picogram per gallon = 2.641721e-7 micrograms per liter.
micrograms per liter = picograms per gallon × 2.641721e-7
For a page dedicated to this direction, see Picogram per Gallon to Microgram per Liter.
Understanding the Microgram per Liter (ug/L)
Mass per volume density.
Understanding the Picogram per Gallon (pg/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many picograms per gallon are in 1 microgram per liter?
1 microgram per liter equals 3,785,411.784 picograms per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per liter to picogram per gallon?
Multiply the microgram per liter value by 3785411.784. The converter above does this instantly to whatever precision you set.
How do I convert picogram per gallon back to microgram per liter?
Use the reverse factor: 1 picogram per gallon equals 2.641721e-7 micrograms per liter. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram per liter?
Microgram per Liter (ug/L) is a unit of density.
What is a picogram per gallon?
Picogram per Gallon (pg/gal) is a unit of density.
Is the microgram per liter to picogram per gallon conversion exact?
Yes. Both microgram per liter and picogram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 3785411.784 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.