1. Hubber’s Formula (for Paraboloid logs):  V = S_m * l
2. Smalian’s Formula (for Paraboloid logs): V = (S₁ +S2)*l/2
3. Newton’s Formula (for Neiloid logs): V = (S₁ +4S_m+S₂)*l/6
4. Quarter girth Formula: V = G*G*l/16

Where,

V = Volume of log
L = Length of log
S_m = Mid cross-sectional area of log
S₁  = Cross-sectional area at the smaller end
S₂  = Cross-sectional area at the larger end
G   = Girth of log

Volume Calculation of Sawn Timber:

V = L x B x H cft.

Volume Calculation of Firewood/Stacked Wood: Firewood is stacked in the form of rectangular parallelepipeds and the volume of the stacked firewood is calculated by: Volume = Length (ft) x Height (ft) x Breadth (ft) of the stack. In Nepal, generally stacks are made of the dimensions 20ft. x 5ft. x 5ft. (500 cft.).