Rafter Decimal Conversion Chart
3/12
4/12
5/12
6/12
7/12
8/12
10/12
12/12
14/12
16/12
18/12
1.035
1.055
1.085
1.120
1.160
1.205
1.31
1.42
1.53
1.67
1.80
Enter Key Measurements
Section #
Lateral Span
Ridge Length
Roof Pitch
(in decimal)
Roof Area
Squares of
Roofing
4 x 8
Sheathing
Number of
Rafters
Rafter
Length
Alternate
Width
Section 1
0
0
0
0
0
6"
8"
10"
Section 2
0
0
0
0
0
6"
8"
10"
Section 3
0
0
0
0
0
6"
8"
10"
Section 4
0
0
0
0
0
6"
8"
10"
Section 5
0
0
0
0
0
6"
8"
10"
Section 6
0
0
0
0
0
6"
8"
10"
Section 7
0
0
0
0
0
6"
8"
10"
Section 8
0
0
0
0
0
6"
8"
10"
Section 9
0
0
0
0
0
6"
8"
10"
Section 10
0
0
0
0
0
6"
8"
10"
Section 11
0
0
0
0
0
6"
8"
10"
Section 12
0
0
0
0
0
6"
8"
10"
Section 13
0
0
0
0
0
6"
8"
10"
Section 14
0
0
0
0
0
6"
8"
10"
Section 15
0
0
0
0
0
6"
8"
10"
Section 16
0
0
0
0
0
6"
8"
10"
Section 17
0
0
0
0
0
6"
8"
10"
Section 18
0
0
0
0
0
6"
8"
10"
Section 19
0
0
0
0
0
6"
8"
10"
Section 20
0
0
0
0
0
6"
8"
10"
Section 21
0
0
0
0
0
6"
8"
10"
Section 22
0
0
0
0
0
6"
8"
10"
Section 23
0
0
0
0
0
6"
8"
10"
Section 24
0
0
0
0
0
6"
8"
10"
Section 25
0
0
0
0
0
6"
8"
10"
Section 26
0
0
0
0
0
6"
8"
10"
Section 27
0
0
0
0
0
6"
8"
10"
Section 28
0
0
0
0
0
6"
8"
10"
Section 29
0
0
0
0
0
6"
8"
10"
Section 30
0
0
0
0
0
6"
8"
10"
Section 31
0
0
0
0
0
6"
8"
10"
Section 32
0
0
0
0
0
6"
8"
10"
Lft.
Width
Ridge lft.
Valley lft.
Totals
Sheathing
Area
Roofing
Squares
Total
OSB
15#
Felt
30#
Felt
0
0
0
0
0
Materials List
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0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x
0
0
pcs.
2 x
0
x 16 Ridge
0
pcs.
2 x
0
x 16 Valley
0
lft.
Ridge Vent
0
Sqrs.
Roofing
0
bxs.
Roofing Nails (Paslode)
0
lft.
Hip & Ridge
0
pcs.
4 x 8 x 7/16 OSB
0
rolls
15 # Felt
0
rolls
30 # Felt
0
bkts.
button caps
Notes
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