Spike's Calculators

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

Measuring log volume using top (small) end diameter measurement.
*Top measurement may be used on all tree species, regardless of diameter and length.*

The top diameter is measured 10 cm from the top end of the log.

All diameter measurements are measured under the bark.

V = π ÷ 4 * L * Dt²where:

V = the log volume in cubic metres

L = length of the log in metres

Dt = the small end diameter measured 10 cm from the top end of the log

- enter the log length in metres
- top end diameter measured 10 cm in from the top end of the log

- the 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