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calculator, converter & more
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about
   
   
  About
  This mobile app was created for the benefit of the membership of the Northeastern Logger's Association and anyone who works in the woods.
  Development of this app was done in cooperation with the State of Vermont Department of Forest, Parks and Recreation, with funding provided in part by a USDA Forest Service Landscape Scale Restoration Grant.  Special thanks to David Neumann of Michigan DNR, Paul Frederick of Vermont FPR and Howard Pope of Farm Credit East for helping make this app possible.
  Additional funding was provided by a Farm Credit East AgEnhancement Grant, by the Northeastern Logger's Association and by Northeast Forests, LLC.
  The Northern Logger app should be used for informational purposes.  No guarantees are made for the accurancy or representedness of any calculation, conversion or reference herein.
  The app was designed and compiled by Dr. Steven Bick of Northeast Forests, LLC, with the help and suggestions of many forest industry reviewers.
  In accordance with Federal law and U.S. Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin, sex, age, or disability.  (Not all prohibited bases apply to all programs.)
  To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington, DC  20250-9410 or call (202) 720-5964 (voice and TDD).  USDA is an equal opportunity provider and employer.
 
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log volumes
  Log Volume (BF)  
  Choose Log Length    
   
feet
  Choose Log Diameter  
   
inches
  Board Foot Volumes  
  Doyle  
         
  Scribner  
         
  International  
         
  Vermont  
log rule prices
  Compare Log Rules & Values
  (use to compare prices & structure grades)
  Log Length    
 
feet  
  Diameter    
 
inches  
  Log Rule 1    
 
   
  Price Log Value  
$
Enter $/MBF
 
  Log Rule 2    
 
   
  Price Log Value  
$
Enter $/MBF
 
log rule conversions
     
  Convert Between Log Rules
  (applies to logs only; not timber)  
  Original Log Rule  
   
  Chose Conversion Rule  
   
  Select Diameter Range (inches)  
   
     
  Enter Log Volume (MBF)  
 
     
  Converted Log Volume (MBF)  
 
     
     
  note: differences between log rules are NOT linear and so the relationship between log rules varies by diameter
lumber tally
  Lumber Tally        
  (summarize board foot totals)    
  Select Lumber Thickness (inches)
 
  Enter # of Boards by Size Below 
  Length         Width (Inches)    
  (Feet) 2" 4" 6" 8" 10" 12"
  6'
  8'
  10'
  12'
  14'
  16'
               
  Total Board Feet      
cord weight
  Cord Weight    
  Calculate Cordwood Weight in Tons
  Select Species   Tons/Cord
 
 
       
   Enter # of Cords   # of Tons
  =
       
  Custom Conversion    
  Enter # of Tons/Cord    
     
       
   Enter # of Cords   # of Tons
  =
thrown cords
  Split Firewood Loads  
  Thrown Load Sizes in Cords  
   Firewood Length (Inches)  
   
 
  Box Length    
   
feet
  Box Width    
   
feet
  Box Height    
   
feet
  Cords in Load  
    cords
       
  Specifications sourced from the   
  State of Maine Thrown Cord Firewood Study
cubic volumes
  Cubic  Volume Comparisons
     
  Select Units  
   
  Enter Amount  
   
     
  Cubic Feet
     
  Rough Cords
     
  Peeled Cords
     
  Cunits
timber volumes
  Timber Volumes  
  Fast Estimates    
  Average Basal Area/Acre  
   
square feet/acre  
  Average Height (# of 16' logs)  
   
logs  
  Size Class    
 
 
  MBF per Acre    
  Doyle      
       
  Scribner      
       
  International    
       
  Results in Form Class 78; add or subtract 3% for each FC lower or higher  
  Specifications sourced from Bick's Northern Tree, Timber and Woody Biomass Volume Tables  
   
tons per acre
  Timber Tons/Acre  
  Basal Area/Acre (Square Feet)
   
  Total Tree Height (Feet)
   
  Truck Load Size (Tons)  
   
  Combined Hardwoods
  Tons per Acre
  Truck Loads per Acre
  Combined Softwoods
     
  Tons per Acre
  Truck Loads per Acre
     
  Specifications sourced from Douglas Montieth's Whole Tree Weight Tables for New York
tree growth rates
  Tree Growth Rates  
       
  DBH of Tree (Inches)  
   
 
  Growth Rings per Inch  
   
 
  Annual Growth Rate  
     
       
  Growth Rates can be applied to BA, cords, tons, MBF etc. by multiplying the rate by the amount of good stock in each category
  Specifications sourced from Burl Ashley's USFS Reference Handbook for Foresters
BA stems per acre
  Stems per Acre    
  Estimate the # of Tree Stems per Acre
  Basal Area/Acre (Square Feet)  
   
   
  Average DBH (Inches)    
   
   
  Tree Stems/Acre    
       
  Specifications sourced from Burl Ashley's USFS Reference Handbook for Foresters  
plantation trees
  Plantation Trees  
  Number of Trees Required for Planting
  # of Acres  
   
 
  Row Spacing (Feet)  
   
 
  Tree Spacing (Feet)  
   
 
`
  # of Trees Required  
     
seedling spacing
  Tree Spacing Requirements
     
  # of Acres
   
  Enter # of Trees
   
     
  Spacing (Feet)
   
loans
  Loan Comparison
    Loan Loan
    Option #1 Option #2
  Enter Loan Amounts ($)
   
  Interest Rate (%)  
   
  Term (Years)  
   
  # of Payments per Year  
   
  Monthly Payment  
   
  Cumulative Interest
   
  Cumulative Interest Comparison
   
retirement savings
  Retirement Savings Calculator
  Current Age    
   
 
  Age at Retirement  
   
 
       
  Current Retirement Savings  
     
  Expected Rate of Return (%)  
   
 
  Annual Savings  
     
  Value at Retirement  
     
bmp drainage spacing
  Skid Trails  
  Spacing for Drainage Structures
       
  Trail Grade (% slope)  
   
 
  Spacing During Logging  
    feet
  Spacing After Logging  
    feet
  Specifications sourced from Vermont Water Quality Acceptable Management Practices for  Logging Professionals
temp culvert sizing
       
  Culvert Sizing (Temporary)
       
  Drainage Area (Acres)  
   
acres
       
  Temporary Culvert Size (Inches)
    inches
       
  Specifications sourced from Vermont Water Quality Acceptable Management Practices for  Logging Professionals
perm culvert sizing
       
  Culvert Sizing (Permanent)
       
  Drainage Area (Acres)  
   
acres
   Culvert Size (Inches)
    inches
       
  Stream draining areas of 200+ acres are likely perennial; adhere to further guidelines
  Specifications sourced from Vermont Water Quality Acceptable Management Practices for  Logging Professionals
temp bridge spans
  Temporary Bridges  
  Minimum Span Between Abutments
  Drainage Area (Acres)  
   
acres
  Minimum Span (Feet)  
    feet
       
  Specifications sourced from Vermont Water Quality Acceptable Management Practices for  Logging Professionals
culvert comparison
  Culvert Size Equivalents  
  # of Smaller Culverts to Equal a Larger One
  Larger Culvert Size (Inches)
   
inches
  Smaller Culvert Size (Inches)
   
inches
       
  # of Smaller Culverts Needed
     
  Always round up the number of smaller culverts - you cannot round down!
mulch and seed
  Mulching & Seeding  
  Mulching & Seeding Requirements
  Select Seeding Option
 
       
  Enter Land Area (Square Feet)
   
square feet
       
  Bales Needed
    bales
  Seed Needed (Pounds)
    lbs of seed
       
  Specifications sourced from Vermont Water Quality Acceptable Management Practices for  Logging Professionals
   
gravel & roads
  Gravel           
  Gravel Needed for Roads or Fill  
  Width (Feet)      
   
feet    
  Length (Feet)      
   
feet    
  Depth (Inches)      
   
inches    
  Cubic Yards Required    
    cubic yards    
           
  Load Size (Cubic Yards)    
   
cubic yards    
  # of Loads Required    
    loads    
  Convert to Tons:      
  Enter Tons/Cubic Yards    
   
tons/cubic yard    
  Tons       
           
forwarder productivity
  Forwarder      
  Calculate Truck Loads per Machine Hour
  Truck Load Size (Tons)  
   
 
  Forwarder Load Size (Tons)  
   
 
  Cycle Time (Minutes)  
   
 
  Productivity*    
  Truck Loads per Machine Hour  
     
  Cost in Time    
  Machine Hours per Truck Load  
     
  *note: system productivity is determined by the output of the entire system and not that of a single machine.
grap skid productivity
  Grapple Skidder    
  Calculate Truck Loads per Machine Hour
  Truck Load Size (Tons)  
   
 
  Bunch Size (Tons)  
   
 
  Cycle Time (Minutes)  
   
 
  Productivity*    
  Truck Loads per Machine Hour  
     
  Cost in Time    
  Machine Hours per Truck Load  
     
       
  *note: system productivity is determined by the output of the entire system and not that of a single machine.
logging chance
federal agencies
state agencies
associations