Mass per volume density.
Pound per Cubic inches to Kilograms per Cubic yard Converter — lb/in3 to kg/yd3
Convert Pound per Cubic inch (lb/in3) to Kilogram per Cubic yard (kg/yd3) using the exact conversion factor (1 pound per cubic inch = 21,162.80561 kilogram per cubic yard). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pound per Cubic inches to Kilograms per Cubic yard 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 / 1.307950619.
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 Cubic yard
Pound per Cubic inch and Kilogram per Cubic yard 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 cubic yard = pound per cubic inches × 21162.8056147
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 cubic yard equals 1.30795061931 base units, so dividing one by the other gives the direct pound per cubic inch-to-kilogram per cubic yard factor of 21162.8056147.
Simple example
1 lb/in3 × 21162.80561 = 21,162.80561 kg/yd3
1 pound per cubic inch = 21,162.80561 kilograms per cubic yard.
Real-world example
1,000 lb/in3 × 21162.80561 = 21,162,805.61 kg/yd3
1,000 pound per cubic inches = 21,162,805.61 kilograms per cubic yard.
Conversion table
| Pound per Cubic inch (lb/in3) | Kilogram per Cubic yard (kg/yd3) |
|---|---|
| 0.1 lb/in3 | 2,116.280561 kg/yd3 |
| 1 lb/in3 | 21,162.80561 kg/yd3 |
| 10 lb/in3 | 211,628.0561 kg/yd3 |
| 100 lb/in3 | 2,116,280.561 kg/yd3 |
| 1,000 lb/in3 | 21,162,805.61 kg/yd3 |
| 10,000 lb/in3 | 211,628,056.1 kg/yd3 |
Reverse conversion: Kilogram per Cubic yard to Pound per Cubic inch
1 kg/yd3 × 0.00004725271395 = 0.0000472527 lb/in3
1 kilogram per cubic yard = 0.0000472527 pound per cubic inches.
pound per cubic inches = kilograms per cubic yard × 0.0000472527139457
For a page dedicated to this direction, see Kilogram per Cubic yard to Pound per Cubic inch.
Pound per Cubic inch vs. Kilogram per Cubic yard
| Aspect | Pound per Cubic inch | Kilogram per Cubic yard |
|---|---|---|
| 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 the density of bulk construction materials such as gravel, soil, or aggregate — in practice, US construction and landscaping references more commonly express this as tons per cubic yard or pounds per cubic foot |
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 Cubic yard
Kilogram per Cubic yard (kg/yd3) measures density. A mathematically valid way to express bulk material density in kilograms per cubic yard. It is classified as a mixed metric/US customary density unit.
Uses of the Kilogram per Cubic yard today
- Can be used to express the density of bulk construction materials such as gravel, soil, or aggregate — in practice, US construction and landscaping references more commonly express this as tons per cubic yard or pounds per cubic foot
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 Cubic yard — sources
- US construction and landscaping material-estimating references — Bulk material weight by volume is typically reported in tons per cubic yard in US construction and landscaping contexts.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cubic yard are in 1 pound per cubic inch?
1 pound per cubic inch equals 21,162.80561 kilograms per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to kilogram per cubic yard?
Multiply the pound per cubic inch value by 21162.80561. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cubic yard back to pound per cubic inch?
Use the reverse factor: 1 kilogram per cubic yard equals 0.0000472527 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 cubic yard?
Kilogram per Cubic yard (kg/yd3) measures density. A mathematically valid way to express bulk material density in kilograms per cubic yard. It is classified as a mixed metric/US customary density unit.
Is the pound per cubic inch to kilogram per cubic yard conversion exact?
Yes. Both pound per cubic inch and kilogram per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 21162.80561 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.