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kN/m³ ⇄ kg/m³ ⇄ lb/ft³ Converter
Enter any value — the others calculate automatically.
Material Density Conversion Tool (kN/m³, kg/m³, lb/ft³)
This tool converts material density between kilonewtons per cubic metre (kN/m³), kilograms per cubic metre (kg/m³), and pounds per cubic foot (lb/ft³).
It is especially useful for evaluating concrete unit weight, soil densities, backfill materials, timber, and lightweight construction materials.
Density is frequently expressed in different units in geotechnical reports, supplier specs, and building codes; this tool avoids misinterpretation and simplifies calculations involving dead loads, buoyancy, or pressure.
Disclaimer
Values produced are approximate conversions for engineering use. Always verify results and refer to project specifications when performing design.
Using These Values in a Real Project?
If you're using these values for:
- Structural design
- Load calculations
- Foundation or soil assessment
These values should be verified within the context of your actual structure and site conditions.
We provide stamped structural assessments and calculations across Ontario, based on real conditions, not assumptions.
Assessments consider site conditions, structural configuration, and applicable design requirements specific to your project.
On-site consultation with a licensed professional engineer.
Site visits are typically available within 1–2 days.