What is being measured?
Mass density is mass per volume. Density conversions do not establish composition, temperature dependence, porosity or a material grade.
Convert compatible measurements of the same quantity. A unit conversion does not infer a new physical property.
Meaning of lb/ft³
lb per cubic foot uses the symbol lb/ft³ in this library and measures density. Under the stated reference convention, 1 lb/ft³ = approximately 16.018463374 kg/m³. This equivalence changes how a known value is written. It does not increase measurement accuracy or establish whether a measurement is appropriate to a real application.
Conversion method
Multiply the value by the source factor (16.01846337396014), then divide by the target factor (1). The factor ratio expresses the same density measurement in the other unit.
Worked example
For a known value of 10 lb/ft³, the reference conversion gives 160.18463374 kg/m³. Converting that result back gives approximately 10 lb/ft³. This reverse check helps catch a reversed factor, but matching round-trip arithmetic alone does not independently verify a source definition.
Common reference values
| Input (lb/ft³) | Reference equivalent (kg/m³) |
|---|---|
| 1 | 16.018463374 |
| 5 | 80.0923168698 |
| 10 | 160.18463374 |
| 25 | 400.461584349 |
| 50 | 800.923168698 |
| 100 | 1601.8463374 |
Compare one lb/ft³ with other units
| Target unit | Equivalent of 1 lb/ft³ | Definition guide |
|---|---|---|
| kg per cubic meter (kg/m³) | 16.018463374 | Read definition |
| kg per liter (kg/L) | 0.016018463374 | Read definition |
| lb per gallon (lb/US gal) | 0.133680555556 | Read definition |
Precision and common mistakes
- Keep the source and target quantity consistent. A matching symbol is not enough to establish a compatible definition.
- Record the original measurement precision. Showing twelve significant digits in a table does not make a rounded input more precise.
- Check symbol capitalization, prefixes and any regional convention in the source. Use the displayed unit definition rather than a similarly named unit.
- Factors involving repeating fractions or π use finite numerical precision. Round the final answer to the precision justified by your input.
Use a working converter
- Density converter
- Lb per cubic foot to kg per cubic meter converter
- Lb per cubic foot to g per cubic centimeter converter
- Lb per cubic foot to lb per gallon converter
- Lb per cubic foot to g per milliliter converter
- Lb per cubic foot to kg per liter converter
Source and verification scope
Examples and tables are computed from the versioned unit definitions used by the linked converters. The source access dates appear below. Computandum is independent of the cited organizations; a citation does not mean that a publisher endorses this page or an actual project.
Sources
- NIST / BIPM: NIST: unit conversion factors ↗ · 2026-10-08