Mass per volume density.
Pound per Cubic inches to Kilograms per Gallon Converter — lb/in3 to kg/gal
Convert Pound per Cubic inch (lb/in3) to Kilogram per Gallon (kg/gal) using the exact conversion factor (1 pound per cubic inch = 104.7798375 kilogram per gallon). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pound per Cubic inches to Kilograms 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 27679.90471 / 264.1720524.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound per Cubic inches to Kilograms per Gallon
Pound per Cubic inch and Kilogram 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. Pound per Cubic inch is most often used for used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure.
Formula
kilograms per gallon = pound per cubic inches × 104.77983747
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic inch equals 27679.9047102 base units, and 1 kilogram per gallon equals 264.172052358 base units, so dividing one by the other gives the direct pound per cubic inch-to-kilogram per gallon factor of 104.77983747.
Simple example
1 lb/in3 × 104.7798375 = 104.7798375 kg/gal
1 pound per cubic inch = 104.7798375 kilograms per gallon.
Real-world example
1,000 lb/in3 × 104.7798375 = 104,779.8375 kg/gal
1,000 pound per cubic inches = 104,779.8375 kilograms per gallon.
Conversion table
| Pound per Cubic inch (lb/in3) | Kilogram per Gallon (kg/gal) |
|---|---|
| 0.1 lb/in3 | 10.47798375 kg/gal |
| 1 lb/in3 | 104.7798375 kg/gal |
| 10 lb/in3 | 1,047.798375 kg/gal |
| 100 lb/in3 | 10,477.98375 kg/gal |
| 1,000 lb/in3 | 104,779.8375 kg/gal |
| 10,000 lb/in3 | 1,047,798.375 kg/gal |
Reverse conversion: Kilogram per Gallon to Pound per Cubic inch
104.7798375 kg/gal × 0.009543820874 = 1 lb/in3
104.7798375 kilograms per gallon = 1 pound per cubic inches.
pound per cubic inches = kilograms per gallon × 0.0095438208738
For a page dedicated to this direction, see Kilogram per Gallon to Pound per Cubic inch.
Pound per Cubic inch vs. Kilogram per Gallon
| Aspect | Pound per Cubic inch | Kilogram per Gallon |
|---|---|---|
| Family | US customary density unit | mixed metric/US customary density unit |
| Typical use | Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure | Can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (US customary) are the specific pairings more commonly seen in fuel and liquid-density references |
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Understanding the Kilogram per Gallon
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
Uses of the Kilogram per Gallon today
- Can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (US customary) are the specific pairings more commonly seen in fuel and liquid-density references
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
Kilogram per Gallon — sources
- Fuel and petroleum liquid-density references — Liquid density figures for fuels are typically reported in kg/L, kg/m³, or lb/gal rather than kg/gal.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per gallon are in 1 pound per cubic inch?
1 pound per cubic inch equals 104.7798375 kilograms per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to kilogram per gallon?
Multiply the pound per cubic inch value by 104.7798375. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per gallon back to pound per cubic inch?
Use the reverse factor: 1 kilogram per gallon equals 0.0095438209 pound per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
What is a kilogram per gallon?
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
Is the pound per cubic inch to kilogram per gallon conversion exact?
Yes. Both pound per cubic inch and kilogram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 104.7798375 used above is exact to as many digits as you choose to display.
Where is the pound per cubic inch still used today?
United States
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.