Mass per volume density.
Pound per Cubic inches to Kilograms per Cubic Meter Converter — lb/in3 to kg/m3
Convert Pound per Cubic inch (lb/in3) to Kilogram per Cubic Meter (kg/m3) using the exact conversion factor (1 pound per cubic inch = 27,679.90471 kilogram per cubic meter). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pound per Cubic inches to Kilograms per Cubic Meter 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.
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 Meter
Pound per Cubic inch and Kilogram per Cubic Meter 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 typically associated with united States, while Kilogram per Cubic Meter is typically associated with universal — the official SI unit for density, used throughout physics and engineering worldwide.
Formula
kilograms per cubic meter = pound per cubic inches × 27679.9047102
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 meter equals 1 base unit, so dividing one by the other gives the direct pound per cubic inch-to-kilogram per cubic meter factor of 27679.9047102.
Simple example
1 lb/in3 × 27679.90471 = 27,679.90471 kg/m3
1 pound per cubic inch = 27,679.90471 kilograms per cubic meter.
Real-world example
1,000 lb/in3 × 27679.90471 = 27,679,904.71 kg/m3
1,000 pound per cubic inches = 27,679,904.71 kilograms per cubic meter.
Conversion table
| Pound per Cubic inch (lb/in3) | Kilogram per Cubic Meter (kg/m3) |
|---|---|
| 0.1 lb/in3 | 2,767.990471 kg/m3 |
| 1 lb/in3 | 27,679.90471 kg/m3 |
| 10 lb/in3 | 276,799.0471 kg/m3 |
| 100 lb/in3 | 2,767,990.471 kg/m3 |
| 1,000 lb/in3 | 27,679,904.71 kg/m3 |
| 10,000 lb/in3 | 276,799,047.1 kg/m3 |
Reverse conversion: Kilogram per Cubic Meter to Pound per Cubic inch
1 kg/m3 × 0.000036127292 = 0.0000361273 lb/in3
1 kilogram per cubic meter = 0.0000361273 pound per cubic inches.
pound per cubic inches = kilograms per cubic meter × 0.0000361272920001
For a page dedicated to this direction, see Kilogram per Cubic Meter to Pound per Cubic inch.
Pound per Cubic inch vs. Kilogram per Cubic Meter
| Aspect | Pound per Cubic inch | Kilogram per Cubic Meter |
|---|---|---|
| Family | US customary density unit | SI coherent derived 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 | Physics and engineering reference density values |
| Where it's used | United States | Universal — the official SI unit for density, used throughout physics and engineering worldwide |
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 Meter
Kilogram per Cubic Meter (kg/m3) measures density. The SI coherent unit for density — the form all other metric density/concentration units in this catalog are ultimately defined relative to. It is classified as a SI coherent derived unit.
Where it's used: Universal — the official SI unit for density, used throughout physics and engineering worldwide
kg/m³ vs. g/L vs. kg/L. All three are exactly related: 1 kg/m³ = 1 g/L, and 1,000 kg/m³ = 1 kg/L. kg/m³ is the formal SI-coherent form; g/L and kg/L are more commonly used in everyday and laboratory contexts.
Uses of the Kilogram per Cubic Meter today
- Physics and engineering reference density values
- Material property tables in scientific literature
- Fluid dynamics and structural engineering calculations
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 Meter — sources
- BIPM SI Brochure, 9th edition — Kilogram per cubic meter as the SI coherent derived unit for density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cubic meter are in 1 pound per cubic inch?
1 pound per cubic inch equals 27,679.90471 kilograms per cubic meter, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to kilogram per cubic meter?
Multiply the pound per cubic inch value by 27679.90471. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cubic meter back to pound per cubic inch?
Use the reverse factor: 1 kilogram per cubic meter equals 0.0000361273 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 meter?
Kilogram per Cubic Meter (kg/m3) measures density. The SI coherent unit for density — the form all other metric density/concentration units in this catalog are ultimately defined relative to. It is classified as a SI coherent derived unit.
Is the pound per cubic inch to kilogram per cubic meter conversion exact?
Yes. Both pound per cubic inch and kilogram per cubic meter are defined by fixed standards rather than physical artifacts, so the factor of 27679.90471 used above is exact to as many digits as you choose to display.
What is the difference between kg/m³ vs. g/l vs. kg/l?
All three are exactly related: 1 kg/m³ = 1 g/L, and 1,000 kg/m³ = 1 kg/L. kg/m³ is the formal SI-coherent form; g/L and kg/L are more commonly used in everyday and laboratory contexts.
Where is the pound per cubic inch still used today?
United States