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
0.493 in (≈ 1/2″)
1.243 in (≈ 1 1/4″)
2
2.486 in (≈ 2 1/2″)
3.236 in (≈ 3 1/4″)
3
4.479 in (≈ 4 1/2″)
5.229 in (≈ 5 1/4″)
4
6.473 in (≈ 6 1/2″)
7.223 in (≈ 7 1/4″)
5
8.466 in (≈ 8 7/16″)
9.216 in (≈ 9 3/16″)
6
10.459 in (≈ 10 7/16″)
11.209 in (≈ 11 3/16″)
7
12.452 in (≈ 12 7/16″)
13.202 in (≈ 13 3/16″)
8
14.445 in (≈ 14 7/16″)
15.195 in (≈ 15 3/16″)
9
16.438 in (≈ 16 7/16″)
17.188 in (≈ 17 3/16″)
10
18.432 in (≈ 18 7/16″)
19.182 in (≈ 19 3/16″)
11
20.425 in (≈ 20 7/16″)
21.175 in (≈ 21 3/16″)
12
22.418 in (≈ 22 7/16″)
23.168 in (≈ 23 3/16″)
13
24.411 in (≈ 24 7/16″)
25.161 in (≈ 25 3/16″)
14
26.404 in (≈ 26 3/8″)
27.154 in (≈ 27 1/8″)
15
28.397 in (≈ 28 3/8″)
29.147 in (≈ 29 1/8″)
16
30.39 in (≈ 30 3/8″)
31.14 in (≈ 31 1/8″)
17
32.384 in (≈ 32 3/8″)
33.134 in (≈ 33 1/8″)
18
34.377 in (≈ 34 3/8″)
35.127 in (≈ 35 1/8″)
19
36.37 in (≈ 36 3/8″)
37.12 in (≈ 37 1/8″)
20
38.363 in (≈ 38 3/8″)
39.113 in (≈ 39 1/8″)
21
40.356 in (≈ 40 3/8″)
41.106 in (≈ 41 1/8″)
22
42.349 in (≈ 42 3/8″)
43.099 in (≈ 43 1/8″)
23
44.342 in (≈ 44 5/16″)
45.092 in (≈ 45 1/16″)
24
46.336 in (≈ 46 5/16″)
47.086 in (≈ 47 1/16″)
25
48.329 in (≈ 48 5/16″)
49.079 in (≈ 49 1/16″)
26
50.322 in (≈ 50 5/16″)
51.072 in (≈ 51 1/16″)
27
52.315 in (≈ 52 5/16″)
53.065 in (≈ 53 1/16″)
28
54.308 in (≈ 54 5/16″)
55.058 in (≈ 55 1/16″)
29
56.301 in (≈ 56 5/16″)
57.051 in (≈ 57 1/16″)
30
58.295 in (≈ 58 5/16″)
59.045 in (≈ 59 1/16″)
31
60.288 in (≈ 60 5/16″)
61.038 in (≈ 61 1/16″)
32
62.281 in (≈ 62 1/4″)
63.031 in (≈ 63″)
33
64.274 in (≈ 64 1/4″)
65.024 in (≈ 65″)
34
66.267 in (≈ 66 1/4″)
67.017 in (≈ 67″)
35
68.26 in (≈ 68 1/4″)
69.01 in (≈ 69″)
36
70.253 in (≈ 70 1/4″)
71.003 in (≈ 71″)
37
72.247 in (≈ 72 1/4″)
72.997 in (≈ 73″)
38
74.24 in (≈ 74 1/4″)
74.99 in (≈ 75″)
39
76.233 in (≈ 76 1/4″)
76.983 in (≈ 77″)
40
78.226 in (≈ 78 1/4″)
78.976 in (≈ 79″)
41
80.219 in (≈ 80 1/4″)
80.969 in (≈ 81″)
42
82.212 in (≈ 82 3/16″)
82.962 in (≈ 82 15/16″)
43
84.205 in (≈ 84 3/16″)
84.955 in (≈ 84 15/16″)
44
86.199 in (≈ 86 3/16″)
86.949 in (≈ 86 15/16″)
45
88.192 in (≈ 88 3/16″)
88.942 in (≈ 88 15/16″)
46
90.185 in (≈ 90 3/16″)
90.935 in (≈ 90 15/16″)
47
92.178 in (≈ 92 3/16″)
92.928 in (≈ 92 15/16″)
48
94.171 in (≈ 94 3/16″)
94.921 in (≈ 94 15/16″)
49
96.164 in (≈ 96 3/16″)
96.914 in (≈ 96 15/16″)
50
98.158 in (≈ 98 3/16″)
98.908 in (≈ 98 15/16″)
51
100.151 in (≈ 100 1/8″)
100.901 in (≈ 100 7/8″)
52
102.144 in (≈ 102 1/8″)
102.894 in (≈ 102 7/8″)
53
104.137 in (≈ 104 1/8″)
104.887 in (≈ 104 7/8″)
54
106.13 in (≈ 106 1/8″)
106.88 in (≈ 106 7/8″)
55
108.123 in (≈ 108 1/8″)
108.873 in (≈ 108 7/8″)
56
110.116 in (≈ 110 1/8″)
110.866 in (≈ 110 7/8″)
57
112.11 in (≈ 112 1/8″)
112.86 in (≈ 112 7/8″)
58
114.103 in (≈ 114 1/8″)
114.853 in (≈ 114 7/8″)
59
116.096 in (≈ 116 1/8″)
116.846 in (≈ 116 7/8″)
60
118.089 in (≈ 118 1/16″)
118.839 in (≈ 118 13/16″)
61
120.082 in (≈ 120 1/16″)
120.832 in (≈ 120 13/16″)
62
122.075 in (≈ 122 1/16″)
122.825 in (≈ 122 13/16″)
63
124.068 in (≈ 124 1/16″)
124.818 in (≈ 124 13/16″)
64
126.062 in (≈ 126 1/16″)
126.812 in (≈ 126 13/16″)
65
128.055 in (≈ 128 1/16″)
128.805 in (≈ 128 13/16″)
66
130.048 in (≈ 130 1/16″)
130.798 in (≈ 130 13/16″)
67
132.041 in (≈ 132 1/16″)
132.791 in (≈ 132 13/16″)
68
134.034 in (≈ 134 1/16″)
134.784 in (≈ 134 13/16″)
69
136.027 in (≈ 136″)
136.777 in (≈ 136 3/4″)
70
138.021 in (≈ 138″)
138.771 in (≈ 138 3/4″)
71
140.014 in (≈ 140″)
140.764 in (≈ 140 3/4″)
72
142.007 in (≈ 142″)
142.757 in (≈ 142 3/4″)
1 full-height piece(s) per 96-inch board; 72 boards for 72 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 0.5-inch target is the maximum clear opening, so the selected count rounds upward to 72 whole strips. Those strips cover 108 inches of wall width. The remaining 36 inches are shared across 73 equal spaces: the interior openings and two outside margins.
Slat 1 starts at 0.493 in (≈ 1/2″); the final slat starts at 142.007 in (≈ 142″). Its right edge reaches 143.507 in (≈ 143 1/2″), leaving 0.493 in (≈ 1/2″) 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 73 strips. Interior openings then measure 0.479 in (≈ 1/2″), and the two outside margins become zero. The material total at the same cut height becomes 584 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, 72 strips need 6912 inches, or 576 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 72 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.