Timber Cruising Calculator
Estimate total stand timber volume from sample plot data using expansion factors and statistical analysis.
Inputs
MBF
acres
Results
Estimated Stand Volume
600 MBF
Volume Per Acre
6 MBF/acre
Average Volume Per Plot12 MBF
Expansion Factor5
Sampling Intensity20%
Standard Error12.6%
95% CI Lower Bound451.2 MBF
95% CI Upper Bound748.8 MBF
Recommended Plots (10% error)64 plots
How to Use This Calculator
- Enter the Total Sample Plot Volume in MBF from your field tally and the number of Plots Measured.
- Enter the Total Plots in Stand and Stand Acreage to compute expansion factors.
- Review Estimated Stand Volume and Volume Per Acre as the primary cruise outputs.
- Check Standard Error and the 95% Confidence Interval to assess cruise precision.
- Use Recommended Plots to determine if additional sampling is needed to reach 10% error or better.
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