# Cubic Method, Manitoba

"Cubic method" log volume formula for estimating the volume of a log using one diameter small end measurement. This is one of the methods of log scaling used in Manitoba, Canada, the other one is the Smalian formula.

Cube Method: Log Volume in Cubic Metres of Tapering CylindersV = volume in cubic metres (m³)

π = 3.14159

L = length of log in metres

D = small end diameter of log in centimetres

##### Log Length

Lengths are entered in the odd centimetre class with the class boundary occurring on the even centimetre.**example:**

*Logs greater than 3.4 m in length and up to and including 3.6 m in*

length, are entered as 3.5 m logs.

a log 3.4 m in length is entered as 3.3m

a log 3.61 is entered as 3.7m

length, are entered as 3.5 m logs.

a log 3.4 m in length is entered as 3.3m

a log 3.61 is entered as 3.7m

##### Log Diameter

Diameters are measured inside the bark in 2 centimetre size class intervals, with the class boundary occurring on the odd centimetre,

33 cm to 35 cm diameter is entered as 34cm

35.1 cm diameter is entered as 36 cm

**example**33 cm to 35 cm diameter is entered as 34cm

35.1 cm diameter is entered as 36 cm

### Cube Method

#### Calculation

- log length in metres
- diameter small end in centimetres

#### Result

- volume in cubic metres

##### Logging Calculators

#### Cubic Volume Log Rule Calculators

- Nova Scotia Cubic Metre Log Scale
- Pressler's Cubic Foot Formula
- Smalian's Formula - Metric
- Smalian's Formula - Imperial
- 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