Green Log Weight Estimator
Weight per Piece and per Load by Species, Diameter, and Length for Rigging Planning and Truck Loading per ISA Best Practices
Free green log weight calculator for arborists, tree service crews, and rigging planners who need to estimate the weight of freshly cut wood before making rigging decisions or loading trucks. Enter the log diameter (or diameter range for tapered sections), length, and wood species, and the calculator returns the estimated green weight in pounds using published green wood density values from the USDA Forest Products Laboratory Wood Handbook.
Knowing the weight of a log or section is critical for safe rigging operations. An arborist rigging a 24-inch diameter, 10-foot section of red oak needs to know that piece weighs approximately 1,600-1,900 pounds green — well beyond what most speed lines and blocks are rated for without shock load considerations. Underestimating log weight is one of the most common causes of rigging failures, crane overloads, and truck overweight violations in the tree care industry. The ISA (International Society of Arboriculture) and ANSI Z133 safety standard both emphasize the importance of weight estimation as part of the rigging plan.
The calculator uses green (freshly cut) wood density, which is significantly higher than air-dried or kiln-dried values because of the moisture content. Green hardwoods typically contain 60-100% moisture content (weight of water relative to oven-dry weight), which roughly doubles the weight compared to air-dried lumber. The output includes the weight per piece, weight per board foot, and a truck load estimator showing how many pieces fit within standard truck weight limits.
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Chipper Throughput Calculator →Calculate board feet for logs going to the sawmill
Board Foot Calculator →How It Works
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Select Wood Species
Choose the tree species from the built-in database. If the exact species is not listed, select the genus (oak, maple, pine, etc.) or use the custom density entry. The calculator uses green wood density values from the USDA FPL Wood Handbook.
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Enter Log Dimensions
Input the log diameter in inches (measured at the mid-point for tapered logs, or enter both end diameters for a Smalian volume calculation) and the length in feet. For irregular or forked sections, estimate the equivalent cylinder dimensions.
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Review Weight Estimate
Check the estimated green weight in pounds and kilograms. The calculator also shows the equivalent weight per linear foot, which is useful for estimating section weights when bucking a log into manageable pieces.
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Check Truck and Rigging Limits
Compare the piece weight against your rigging gear ratings (slings, blocks, lowering devices) with appropriate safety factors, and against truck payload capacity for loading and transport.
Built For
- Arborists estimating piece weights for rigging plans before technical tree removals
- Tree service crew leaders determining whether a piece can be safely lowered with the rigging gear on the truck
- Crane operators verifying lift weights against crane load charts for tree removal operations
- Log truck drivers checking that their load will be within legal weight limits before leaving the job site
Features & Capabilities
Green Wood Density Database
Includes green wood density values (lbs/ft3) for 50+ common North American tree species from the USDA Forest Products Laboratory Wood Handbook. Covers hardwoods (oak, maple, ash, hickory, elm, beech) and softwoods (pine, spruce, fir, cedar, hemlock).
Tapered Log Volume
Calculates log volume using the Smalian formula (average of two end areas times length) for tapered sections, or the simple cylinder formula for uniform-diameter pieces. Both methods give the cubic foot volume used in the weight calculation.
Weight Per Linear Foot
Shows the weight per linear foot at the given diameter, making it easy to estimate the weight of any length section when bucking a log on site. A quick field reference for rigging decisions.
Truck Load Estimator
Calculates how many pieces of the specified dimensions fit within standard truck weight limits (typically 40,000-48,000 lbs payload for a tandem log truck) to help plan the number of truck loads for the job.
Frequently Asked Questions
Learn More
Green Wood Weight Estimation by Species
How to estimate the weight of green logs by species density, diameter, and length for safe rigging and equipment selection.
Arborist Rigging & Dynamic Shock Loads
How to estimate peak dynamic forces in arborist rigging from fall distance, rope elongation, and rigging configuration per ANSI Z133.
Chipper Production & Chip Volume Estimation
How to estimate wood chip volume from tree removal operations using DBH, expansion factors, and truck capacity planning.
Related Tools
Dynamic Rigging Shock Load Calculator
Calculate peak impact force on arborist rigging from free-fall distance, rope elongation, and rigging configuration.
Chipper Throughput & Truck Capacity Calculator
Estimate chip volume from whole-tree removal by DBH or board feet. Calculates expansion factor, truck loads, and weight limits.