Spike's Calculators

Log rules used to measure the volume of a log with the result in board feet. One board foot measures 12 inches x 12 inches x 1 inch and in theory, one cubic foot contains 12 board feet. But this does not usually apply to a board foot scaling rule as this does not take into account the amount of waste of cutting a log into usable sections that can be measured in board feet. The one and only exception to this is the Brereton log rule that converts one cubic foot to 12 board feet.

- Brereton Log Rule - Imperial Measurements
- Blodgett Foot Rule
- Doyle Log Rule
- Early Log Rule
- International 1/8-inch Log Rule
- International 1/4-inch Log Rule
- International 1/4-inch Log Rule (Grosenbaugh)
- International 1/8-inch and 1/4-inch Log Rules
- Roy Log Rule
- Ontario Log Rule
- Scribner Log Rule
- Scribner Log Rule: Board Foot Volume of a Tree
- Scribner Decimal C
- Comparing Results from Various Board Feet Log Rules

Log scaling calculators that approximate the cubic volume of a log. Most common ones have results in cubic feet and cubic metres.

- Brereton Log Rule - Metric Measurements
- Burt's Quarter Girth Method
- Chinese National Standard
- Cubic Metre Rule
- Francon Measure
- Hoppus Rule
- Huber's Formula
- Ireland: Log Volume Measurement
- Japanese Agricultural Standard (JAS)
- Manitoba: Cubic Method
- Newton's Formula
- Nova Scotia Cubic Metre Log Scale
- Pressler's Cubic Foot Formula
- Smalian's Formula - Metric
- Smalian's Formula - Imperial
- Solid Volume of a Log
- Spike's Rule
- Swedish Log Volume Calculation
- Swedish Log Volume Calculation Method One
- Swedish Log Volume Calculation Method Two
- Swedish Log Volume Calculation Method Three
- William Klemme

Various calculators that will let you calculate various aspects of trees including weight and volume of logs.

- Estimating Cubic Metres of Wood Needed for Pulp
- Estimate the Volume of Bark as a Percentage Calculator
- Estimating Volume of Wood Required for Pulp
- Estimating the Weight of a Log
- Estimate the Weight of a Log in Kilograms using Huber's Formula
- Volume and Green Weight of a Log Calculator

Area conversion calculators with Forestry in mind.

Calculators that convert between amounts per square area.

- Amount per Square Inch to per Square Centimetre
- Amount per Square Centimetre to per Square Inch
- Amount per Square Metre to per Square Foot
- Amount per Square Foot to per Square Metre
- Amount per Square Yard to per Square Metre
- Amount per Square Metre to per Square Yard
- Amount per Milacre to per Square Metre
- Amount per Square Metre to per Milacre
- Amount per Acre to per Hectare
- Amount per Hectare to per Acre
- Amount per Square Mile to per Square Kilometre
- Amount per Square Kilometre to per Square Mile

Cubic volume of trees in a woodlot with conversions between different areas.

- Cubic Foot per Acre to Cubic Metres per Hectare
- Cubic Metre per Hectare to Cubic Feet per Acre
- Cubic Metre per Hectare to Hoppus Feet per Acre
- Hoppus Foot per Acre to Cubic Metres per Hectare

Calculators that will let you calculate basal area, plot area size and conversions between girth and diameter measurements.

- Area of a Circle from Diameter in Metres
- Area of a Circle from Foot and Inch Diameter
- Basal Area from Diameter in Centimetres
- Basal Area from Diameter in Inches
- Basal Area from Girth Measured @ Breast Height in Centimetres
- Basal Area from Girth Measured @ Breast Height in Inches
- Circumference (Girth) of a Log from Diameter, Foot and Inch
- Convert Diameter in Centimetres to Girth in Inches
- Circumference (Girth) of a Log from Diameter, Inch and Fraction
- Diameter of Tree from Circumference Measurement
- Diameter/Centimetres to Inches/Quarter Girth
- Fixed Area Plot, Acres
- Fixed Area Plots, Hectares
- Number of Trees and Tree Spacing Calculated from Basal Area
- Square Feet (Quarter Girth) to Square Centimetres
- Square Feet (Quarter Girth) to Square Metres
- Trees per Hectare to Trees per Acre
- Trees per Acre to Trees per Hectare

Approximate the volume of trees in board feet and cubic metres.

- Doyle Log Rule for Standing Trees
- Doyle Log Rule for Standing Trees using Metric Measurements
- International ¼ Inch Log Rule for Standing Trees
- International ¼ Inch Log Rule for Standing Trees - Metric
- Scribner Log Rule for Standing Trees
- Scribner Log Rule for Standing Trees - Metric
- Standing Tree Cubic Volume Calculator
- Standing Tree Board Foot Volume Based on the Doyle Log Rule
- Standing Tree Board Foot Volume Based on the International 1/4 Log Rule