Engineering Calculators
Unit Weight / Density Converter
Convert common soil and material density or unit weight values between pcf, kN/m3, and kg/m3.
Parameter sketch
Unit conversion path
Labels update with the current input values so the formula symbols stay tied to the geometry.
value: 120from: pcfto: kn/m3
Result
120 pcf = 18.8505 kn/m3
Converted
18.8505
Step-by-step calculation
- 120 pcf converts to 18.8505 kn/m3.
What this means
Use consistent units throughout engineering calculations to avoid hidden conversion errors.
Formula Used
value in pcf = value x source conversion factor
Step-by-Step Example
120 pcf is about 18.86 kN/m3.
Engineering Notes
Check units, assumptions, boundary conditions, groundwater, drainage, and whether the simplified method is appropriate before using a result in any project decision.
FAQ
Are density and unit weight identical?
Strictly no, but engineers often convert common field values using standard weight-density relationships.