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 planning calculator for arborists, tree service crews, and rigging planners who need a preliminary estimate of freshly cut wood weight. Enter the log diameter, length, measurement point, bark allowance, shape allowance, and species or custom density. The app returns a local green-weight estimate and, if entered, a limited WLL utilization calculator.
The species-density rows are local source-gap planning values with USDA Forest Products Laboratory, ANSI Z133, OSHA, and ASME source pointers. They are not a verified species table, load ticket, trucking weight, crane load-chart calculation, rigging design, arboricultural job briefing, or lift authorization.
Actual log weight varies with exact species, moisture, season, heartwood and sapwood ratio, taper, bark, limbs, hollows, decay, soil, and defects. Use a calibrated scale, load cell, dynamometer, manufacturer load chart, current OSHA/ANSI/ASME requirements, employer procedures, and qualified review before lifting, lowering, loading, hauling, or selling wood by weight.
Check rigging shock-load prompts before qualified review
Dynamic Rigging Shock Load Calculator →Estimate chipper throughput and truck fill times
Chipper Throughput Calculator →Calculate board feet for logs going to the sawmill
Board Foot Calculator →Check crane rigging capacity for heavy log lifts
Crane Rigging Calculator →How It Works
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Select Species or Density
Choose a local species row or enter a custom green density. Verify the exact species and moisture basis before using the number for safety, transport, sale, or settlement decisions.
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Enter Log Geometry
Input outside-bark diameter, length, and measurement point. The app uses a simple cylinder volume plus local butt or small-end taper screens, not a full log-scaling or irregular-form model.
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Add Local Allowances
Select bark and shape allowances for preliminary planning. Limb wood, hollows, decay, soil, knots, crotches, sweep, and hidden defects still require field judgment and measurement.
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Review WLL Boundary
Optionally enter a WLL and uncertainty margin. The WLL result is only a math screen and does not evaluate rigging geometry, crane charts, loader stability, hardware, inspection, dynamic loads, or legal transport limits.
Built For
- Arborists making a preliminary piece-weight screen before qualified lift or rigging review
- Tree service crew leaders comparing rough log weights against measured or tagged equipment data
- Crane or loader planners collecting a starting weight estimate before load-chart and setup review
- Hauling crews screening likely log weight before scale tickets, securement review, and legal payload checks
Features & Capabilities
Local Density Rows
Shows local green-density rows for common species and keeps their source-gap status visible. USDA/FPL is cited as a pointer, but each species row and moisture basis still needs reconciliation before critical use.
Simple Geometry Calculator
Calculates cylinder volume from outside-bark diameter and length with local butt-end or small-end taper screens. It is not a log scale, taper equation, or irregular-form measurement standard.
Allowance Multipliers
Applies user-selected bark and irregular-shape allowances after the base density calculation. These are planning multipliers and must be checked against field conditions.
WLL Utilization Calculator
Multiplies estimated weight by an uncertainty margin and compares it to an entered WLL while warning that rigging geometry, hardware, crane charts, dynamic loads, and qualified review remain external.
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 Shock-Load Source Boundaries
Source-boundary guide for local arborist rigging force prompts, rope rows, hardware tags, anchors, procedures, and qualified review.
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.