Mass per volume density.
Pound per Cubic inches to Pounds per Fluid ounce Converter — lb/in3 to lb/fl oz
Convert Pound per Cubic inch (lb/in3) to Pound per Fluid ounce (lb/fl oz) using the exact conversion factor (1 pound per cubic inch = 1.8046875 pound per fluid ounce). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches to Pounds per Fluid ounce 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 / 15337.7827.
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 Pounds per Fluid ounce
Pound per Cubic inch and Pound per Fluid ounce 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
pounds per fluid ounce = pound per cubic inches × 1.8046875
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 pound per fluid ounce equals 15337.7826966 base units, so dividing one by the other gives the direct pound per cubic inch-to-pound per fluid ounce factor of 1.8046875.
Simple example
1 lb/in3 × 1.8046875 = 1.8046875 lb/fl oz
1 pound per cubic inch = 1.8046875 pounds per fluid ounce.
Real-world example
1,000 lb/in3 × 1.8046875 = 1,804.6875 lb/fl oz
1,000 pound per cubic inches = 1,804.6875 pounds per fluid ounce.
Conversion table
| Pound per Cubic inch (lb/in3) | Pound per Fluid ounce (lb/fl oz) |
|---|---|
| 0.1 lb/in3 | 0.18046875 lb/fl oz |
| 1 lb/in3 | 1.8046875 lb/fl oz |
| 10 lb/in3 | 18.046875 lb/fl oz |
| 100 lb/in3 | 180.46875 lb/fl oz |
| 1,000 lb/in3 | 1,804.6875 lb/fl oz |
| 10,000 lb/in3 | 18,046.875 lb/fl oz |
Reverse conversion: Pound per Fluid ounce to Pound per Cubic inch
1.8046875 lb/fl oz × 0.5541125541 = 1 lb/in3
1.8046875 pounds per fluid ounce = 1 pound per cubic inches.
pound per cubic inches = pounds per fluid ounce × 0.554112554113
For a page dedicated to this direction, see Pound per Fluid ounce to Pound per Cubic inch.
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 Pound per Fluid ounce (lb/fl oz)
Mass per volume density.
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.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per fluid ounce are in 1 pound per cubic inch?
1 pound per cubic inch equals 1.8046875 pounds per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to pound per fluid ounce?
Multiply the pound per cubic inch value by 1.8046875. The converter above does this instantly to whatever precision you set.
How do I convert pound per fluid ounce back to pound per cubic inch?
Use the reverse factor: 1 pound per fluid ounce equals 0.5541125541 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 pound per fluid ounce?
Pound per Fluid ounce (lb/fl oz) is a unit of density.
Is the pound per cubic inch to pound per fluid ounce conversion exact?
Yes. Both pound per cubic inch and pound per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 1.8046875 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.