Mass per volume density.
Nanograms per Pint to Drams per Gallon Converter — ng/pt to dr/gal
Convert Nanogram per Pint (ng/pt) to Dram per Gallon (dr/gal) using the exact conversion factor (1 nanogram per pint = 4.515067e-9 dram per gallon). See the formula, worked examples, and conversion table.
Nanograms per Pint to Drams 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 2.11337642e-9 / 0.4680719817.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nanograms per Pint to Drams per Gallon
Nanogram per Pint and Dram 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
drams per gallon = nanograms per pint × 4.515067e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 nanogram per pint equals 2.113376e-9 base units, and 1 dram per gallon equals 0.468071981707 base units, so dividing one by the other gives the direct nanogram per pint-to-dram per gallon factor of 4.515067e-9.
Simple example
1 ng/pt × 4.515067e-9 = 4.515067e-9 dr/gal
1 nanogram per pint = 4.515067e-9 drams per gallon.
Real-world example
1,000 ng/pt × 4.515067e-9 = 0.0000045151 dr/gal
1,000 nanograms per pint = 0.0000045151 drams per gallon.
Conversion table
| Nanogram per Pint (ng/pt) | Dram per Gallon (dr/gal) |
|---|---|
| 0.1 ng/pt | 4.515067e-10 dr/gal |
| 1 ng/pt | 4.515067e-9 dr/gal |
| 10 ng/pt | 4.515067e-8 dr/gal |
| 100 ng/pt | 4.515067e-7 dr/gal |
| 1,000 ng/pt | 0.0000045151 dr/gal |
| 10,000 ng/pt | 0.0000451507 dr/gal |
Reverse conversion: Dram per Gallon to Nanogram per Pint
4.515067e-9 dr/gal × 221480649.4 = 0.9999999713 ng/pt
4.515067e-9 drams per gallon = 0.9999999713 nanograms per pint.
nanograms per pint = drams per gallon × 221480649.414
For a page dedicated to this direction, see Dram per Gallon to Nanogram per Pint.
Understanding the Nanogram per Pint (ng/pt)
Mass per volume density.
Understanding the Dram per Gallon (dr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per gallon are in 1 nanogram per pint?
1 nanogram per pint equals 4.515067e-9 drams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert nanogram per pint to dram per gallon?
Multiply the nanogram per pint value by 4.515067e-9. The converter above does this instantly to whatever precision you set.
How do I convert dram per gallon back to nanogram per pint?
Use the reverse factor: 1 dram per gallon equals 221,480,649.4 nanograms per pint. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanogram per pint?
Nanogram per Pint (ng/pt) is a unit of density.
What is a dram per gallon?
Dram per Gallon (dr/gal) is a unit of density.
Is the nanogram per pint to dram per gallon conversion exact?
Yes. Both nanogram per pint and dram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 4.515067e-9 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.