# Scribner Decimal C Rule Calculator

J. M. Scribner developed the Scribner log rule in 1846.

The Scribner Rule is called a diagram rule because the original numbers were derived by fitting boards into perfect circles representing the ends of logs.

*The Scribner rule was adapted by the Lufkin Rule Company and published as decimal A, B and C rules.*

A change was made to the basic Scribner rule to make it easier to apply. This new rule the "Scribner Decimal C Rule" is different from the standard Scribner rule in that all volumes are rounded to the nearest 10 board feet.

### Scribner Decimal C Log Rule

#### Calculation

- the length of the log in measured in feet
- small end diameter of the log measured in inches

#### Result

- the volume of the log in board feet