Spike's Calculators

"Measuring of Roundwood" as recommended by the Timber Measurement Council

Measuring log volume using mid-point diameter measurement

*Mid-point measurement may be used on all tree species, regardless of diameter and length.
Diameter measurements are measured under the bark. *

V = π ÷ 4 * L * Dm²where:

V = the log volume in cubic metres

L = length of the log in metres

Dm = the mid-point diameter

- the log length in metres
- the diameter measured at the mid-length of the log

- volume of log in 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