Calculating the Cubic Feet of Rough Timber


Rough Timber Cubic Feet

I often buy off of the local Tree Surgeons Branches of various Woods and I have an agreed rate based on a Price per Cubic Foot.

To make Calculation easy I use the small Chart below to find the exact amount for each size that I am purchasing and therefore avoid any disagreement over Price, well almost.

Length  Ft. >12345678910
Diameter ins.<<<<CubicFeet>>>>
20.020.040.070.090.110.130.150.170.200.22
30.050.100.150.200.250.290.340.390.440.49
40.090.170.260.350.440.520.610.700.790.87
50.140.270.410.550.680.820.951.091.231.36
60.200.390.590.790.981.181.371.571.771.96
70.270.530.801.071.341.601.872.142.402.67
80.350.701.051.401.742.092.442.793.143.49
90.440.881.321.772.212.653.093.533.974.42
100.551.091.642.182.733.273.824.364.915.45
110.661.321.982.643.303.964.625.285.946.60
120.791.572.363.143.934.715.506.287.077.85

I simply sort the Branches by Diameter and then measure the total length and from the Chart I can quickly establish the Volume of Timber in Cubic Feet. i.e. I have 5 Logs approximately all 6″ diameter and with a total length of 18ft, from the Chart I get 1.77ft³(6″ by 9ft) x 2 (to get 18ft) therefore I have 3.54ft³ of Timber.

I carry this around with me, I always have one in my Wallet, one in the Car and yet another in the Workshop and House so I am never without my own little Ready Reckoner, plus a similar one converting Price per Cubic Foot into my Buying Price.

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