Table of Contents

Volume Conversion Factors (Int. 1/4 and Standard Cords)

Int. 1/4" Rule (BAF-20)

Form Class 79
Ave. Number Logs per Average Tree
DBH 1 1 1/2 2 2 1/2 3 3 1/2 4
8 573 515 458 401 – – –
9 634 558 509 462 415 – –
10 697 611 559 477 470 – –
11 727 636 591 539 506 – –
12 738 653 611 560 536 480 449
13 759 679 634 585 553 508 477
14 767 685 645 598 567 524 493
15 774 695 652 609 581 543 513
16 773 696 655 612 587 550 523
17 786 710 672 632 604 567 539
18 792 717 679 638 613 575 549

Volume per acre = (Sum of # logs X Factor)/No. Sampling points

Factor of 600 for average timber, over estimates in tall timber, underestimates in short timber.

Pulpwood Volume Conversion Factors for Standard Cord

(Prism BAF-10)
Ave. Number 5-foot Bolts per Average Tree
DBH 1 2 3 4 5 6 7 8 9 10 11 12
4 .56 .46 .43 – – – – – – – – –
5 .69 .51 .45 .42 .40 – – – – – – –
6 – .51 .45 .42 .40 .38 .37 .37 – – – –
7 – – .44 .41 .39 .38 .37 .36 .35 – – –
8 – – .43 .40 .38 .37 .36 .35 .35 .35 .34 .34
9 – – – .39 .37 .36 .35 .35 .34 .34 .34 .33
10 – – – .39 .37 .36 .36 .35 .34 .34 .34 .34
11 – – – .38 .37 .36 .35 .35 .34 .34 .34 .33
12 – – – .38 .37 .36 .35 .34 .34 .34 .34 .33
13 – – – .35 .34 .33 .32 .32 .32 .31 .31 .31
14 – – – .37 .36 .35 .35 .34 .34 .34 .34 .33
15 – – – – – – .35 .34 .34 .34 .34 .33

Vol/Acre = (sum Number 5' Bolts X Factor)/No. of Points
Av. Factor for 5' Bolts .37
Vol. From VDF Pub. 58