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Log Weight Calculator

m
m
kg/m^3

Result

Log mass (kg)376.9911184308
↗ Construction

Log Weight Calculator: calculate log mass (kg) from explicitly entered values.

Formula

mass = pi * (diameter/2)^2 * length * density
  • Model: mass = pi * (diameter/2)^2 * length * density. Treats the log as a uniform solid cylinder, neglects taper, bark, moisture variation and voids; diameter, length and density must be nonnegative. This calculator uses the supplied inputs and does not provide a certified engineering, medical, or financial assessment.
  • The main inputs are Log diameter, Log length, Wood density. Enter them in the units and format shown in the calculator.
  • Keep measurements and project assumptions consistent before comparing or combining values.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Log Weight

Inputs
  • Log diameter: 0.4
  • Log length: 5 m
  • Wood density: 600 kg/m^3

Using Log diameter (m) = 0.4, Log length (m) = 5, Wood density (kg/m^3) = 600, the calculated result is Log mass (kg): 376.991118431.

Sample result: Calculating…

Frequently asked questions

What does the Log Weight calculate?

Log Weight Calculator: calculate log mass (kg) from explicitly entered values.

Which values should I enter?

Enter Log diameter, Log length, Wood density using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: mass = pi * (diameter/2)^2 * length * density.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026