Spike's Calculators

This is the Hoppus foot rule in metric format with results in Francon cubic metres (fr. M³).

To avoid confusion, the cubic metre result from Hoppus is referred to as a Francon cubic metre.

V = (G ÷ 4)² * L ÷ 10000V = volume in Francon cubic metres

G = girth measured mid point of the log in centimetres

L = length of log in metres

one Francon cubic metre (fr. M³) = 1.27324 cubic metres (m³) one Francon cubic metre (fr. M³) = 44.964 cubic feet (ft³) one Francon cubic metre (fr. M³) = 35.315 Hoppus feet (h ft)

- 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