Horizontal scale only. Every cut is assumed to be 96 inches tall.
Slat marks from the left boundary (in; inch fractions rounded to 1/16)
Slat
Start / left edge
Center
1
0.966 in (≈ 15/16″)
1.716 in (≈ 1 11/16″)
2
3.432 in (≈ 3 7/16″)
4.182 in (≈ 4 3/16″)
3
5.898 in (≈ 5 7/8″)
6.648 in (≈ 6 5/8″)
4
8.364 in (≈ 8 3/8″)
9.114 in (≈ 9 1/8″)
5
10.831 in (≈ 10 13/16″)
11.581 in (≈ 11 9/16″)
6
13.297 in (≈ 13 5/16″)
14.047 in (≈ 14 1/16″)
7
15.763 in (≈ 15 3/4″)
16.513 in (≈ 16 1/2″)
8
18.229 in (≈ 18 1/4″)
18.979 in (≈ 19″)
9
20.695 in (≈ 20 11/16″)
21.445 in (≈ 21 7/16″)
10
23.161 in (≈ 23 3/16″)
23.911 in (≈ 23 15/16″)
11
25.627 in (≈ 25 5/8″)
26.377 in (≈ 26 3/8″)
12
28.093 in (≈ 28 1/16″)
28.843 in (≈ 28 13/16″)
13
30.559 in (≈ 30 9/16″)
31.309 in (≈ 31 5/16″)
14
33.025 in (≈ 33″)
33.775 in (≈ 33 3/4″)
15
35.492 in (≈ 35 1/2″)
36.242 in (≈ 36 1/4″)
16
37.958 in (≈ 37 15/16″)
38.708 in (≈ 38 11/16″)
17
40.424 in (≈ 40 7/16″)
41.174 in (≈ 41 3/16″)
18
42.89 in (≈ 42 7/8″)
43.64 in (≈ 43 5/8″)
19
45.356 in (≈ 45 3/8″)
46.106 in (≈ 46 1/8″)
20
47.822 in (≈ 47 13/16″)
48.572 in (≈ 48 9/16″)
21
50.288 in (≈ 50 5/16″)
51.038 in (≈ 51 1/16″)
22
52.754 in (≈ 52 3/4″)
53.504 in (≈ 53 1/2″)
23
55.22 in (≈ 55 1/4″)
55.97 in (≈ 56″)
24
57.686 in (≈ 57 11/16″)
58.436 in (≈ 58 7/16″)
25
60.153 in (≈ 60 1/8″)
60.903 in (≈ 60 7/8″)
26
62.619 in (≈ 62 5/8″)
63.369 in (≈ 63 3/8″)
27
65.085 in (≈ 65 1/16″)
65.835 in (≈ 65 13/16″)
28
67.551 in (≈ 67 9/16″)
68.301 in (≈ 68 5/16″)
29
70.017 in (≈ 70″)
70.767 in (≈ 70 3/4″)
30
72.483 in (≈ 72 1/2″)
73.233 in (≈ 73 1/4″)
31
74.949 in (≈ 74 15/16″)
75.699 in (≈ 75 11/16″)
32
77.415 in (≈ 77 7/16″)
78.165 in (≈ 78 3/16″)
33
79.881 in (≈ 79 7/8″)
80.631 in (≈ 80 5/8″)
34
82.347 in (≈ 82 3/8″)
83.097 in (≈ 83 1/8″)
35
84.814 in (≈ 84 13/16″)
85.564 in (≈ 85 9/16″)
36
87.28 in (≈ 87 1/4″)
88.03 in (≈ 88″)
37
89.746 in (≈ 89 3/4″)
90.496 in (≈ 90 1/2″)
38
92.212 in (≈ 92 3/16″)
92.962 in (≈ 92 15/16″)
39
94.678 in (≈ 94 11/16″)
95.428 in (≈ 95 7/16″)
40
97.144 in (≈ 97 1/8″)
97.894 in (≈ 97 7/8″)
41
99.61 in (≈ 99 5/8″)
100.36 in (≈ 100 3/8″)
42
102.076 in (≈ 102 1/16″)
102.826 in (≈ 102 13/16″)
43
104.542 in (≈ 104 9/16″)
105.292 in (≈ 105 5/16″)
44
107.008 in (≈ 107″)
107.758 in (≈ 107 3/4″)
45
109.475 in (≈ 109 1/2″)
110.225 in (≈ 110 1/4″)
46
111.941 in (≈ 111 15/16″)
112.691 in (≈ 112 11/16″)
47
114.407 in (≈ 114 7/16″)
115.157 in (≈ 115 3/16″)
48
116.873 in (≈ 116 7/8″)
117.623 in (≈ 117 5/8″)
49
119.339 in (≈ 119 5/16″)
120.089 in (≈ 120 1/16″)
50
121.805 in (≈ 121 13/16″)
122.555 in (≈ 122 9/16″)
51
124.271 in (≈ 124 1/4″)
125.021 in (≈ 125″)
52
126.737 in (≈ 126 3/4″)
127.487 in (≈ 127 1/2″)
53
129.203 in (≈ 129 3/16″)
129.953 in (≈ 129 15/16″)
54
131.669 in (≈ 131 11/16″)
132.419 in (≈ 132 7/16″)
55
134.136 in (≈ 134 1/8″)
134.886 in (≈ 134 7/8″)
56
136.602 in (≈ 136 5/8″)
137.352 in (≈ 137 3/8″)
57
139.068 in (≈ 139 1/16″)
139.818 in (≈ 139 13/16″)
58
141.534 in (≈ 141 9/16″)
142.284 in (≈ 142 5/16″)
1 full-height piece(s) per 96-inch board; 58 boards for 58 slats. Kerf 0 in between pieces only. No end trimming, defects, spare stock, or ripping from wide boards included.
How the 12-foot pattern fits
The measured wall is 144 inches wide. Each slat occupies 1.5 inches across that span. The 1-inch target is the maximum clear opening, so the selected count rounds upward to 58 whole strips. Those strips cover 87 inches of wall width. The remaining 57 inches are shared across 59 equal spaces: the interior openings and two outside margins.
Slat 1 starts at 0.966 in (≈ 15/16″); the final slat starts at 141.534 in (≈ 141 9/16″). Its right edge reaches 143.034 in (≈ 143 1/16″), leaving 0.966 in (≈ 15/16″) before the right boundary. Every start uses the same origin. The center of the wall at 72 in (≈ 72″) falls in the central opening. Use the table to check that relationship against the furniture or object you want to center.
Compare flush ends before choosing
Switching this span to flush end slats selects 58 strips. Interior openings then measure 1 in (≈ 1″), and the two outside margins become zero. The material total at the same cut height becomes 464 feet. This alternative changes the boundary rule and the position marks, so use a newly calculated table if you adopt it. If you already have a specific count, open the calculator and switch to count mode rather than treating the target as exact spacing.
Cut length and stock capacity
At 96 inches per strip, 58 strips need 5568 inches, or 464 linear feet. With zero kerf and no end trimming, a 96-inch stock board supplies 1 complete pieces at this height. The resulting estimate is 58 boards already matching the specified 1.5-inch face width. This excludes ripping from a wider plank, damaged stock, spare boards, backing, and rails.
Enter a real saw kerf before ordering. If two or more pieces appear to fit exactly, even a small cutting loss can reduce the capacity by one. Measure the usable ends and plan individual cuts. Short leftover pieces are not counted as full-height strips. If your wall has a sill or slope, use separate cut-length groups instead of assuming the height here applies everywhere.
Check the actual wall
Put tape at several of the listed starts, including the first and last, and compare the visible margins. Fractions round independently to 1/16 inch; do not repeatedly add a rounded gap. Check the span at multiple heights and inspect outlet cover plates and casing against both edges of each strip. The calculator does not move individual slats around obstacles or establish installation requirements.