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Roofing Slate Calculator

This calculator will estimate the following -

  • number of slates required per square metre
  • tile batten gauge for slate
  • total linear run of tile batten in metres
  • holing gauge for holing slates

Please enter the dimensions in the white fields below and click calculate to show the results.




Dimensions  
Length of Slate
Width of Slate
Headlap
Number of slates required per sq m
Battening gauge in mm
Metres of tile batten per sq m
Slate holing gauge in mm
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You can also use the following tables for calculating your slate roofing & batten requirements:


Roof Slate Sizes Headlap required in mm.
50 55 60 65 70 80 85 90 95 100 105 110 115 120 125 130 150
600 x 350 10.2 10.3 10.4 10.5 10.7 10.9 11.0 11.1 11.2 11.3 11.4 11.6 11.7 11.8 11.9 12.0 12.5
600 x 300 11.9 12.0 12.2 12.3 12.4 12.7 12.8 13.0 13.1 13.2 13.3 13.5 13.6 13.7 13.9 14.0 14.6
550 x 300 13.1 13.3 13.4 13.6 13.7 14.0 14.2 14.4 14.5 14.7 14.8 15.0 15.1 15.3 15.4 15.6 16.4
500 x 300 14.6 14.8 15.0 15.2 15.4 15.8 16.0 16.2 16.3 16.5 16.7 16.9 17.1 17.3 17.5 17.7 18.7
500 x 250 17.4 17.6 17.9 18.1 18.4 18.8 19.1 19.3 19.5 19.8 20.0 20.3 20.5 20.7 21.0 21.2 22.4
540 x 300 16.4 16.7 16.9 17.2 17.4 17.9 18.2 18.5 18.7 19.0 19.2 19.5 19.7 20.0 20.2 20.5 21.9
450 x 250 19.6 19.9 20.2 20.5 20.8 21.4 21.7 22.1 22.4 22.7 23.0 23.3 23.6 23.9 24.2 24.5 26.1
450 x 300 18.7 19.1 19.4 19.8 20.1 20.8 21.2 21.5 21.9 22.1 22.6 22.9 23.3 23.6 24.0 24.3  
450 x 250 22.4 22.8 23.2 23.6 24.1 24.9 25.3 25.7 26.1 26.5 26.9 27.4 27.8 28.2 28.6 29.0  
450 x 200 27.9 28.4 28.9 29.4 30.0 31.0 31.5 32.0 32.5 33.0 33.5 34.1 34.6 35.1 35.6 36.1  
350 x 300 21.9 22.4 22.8 23.3 23.7 24.7 25.1 25.6 26.1 26.5 27.0 27.4 27.9        
350 x 250 26.1 26.7 27.2 27.8 28.3 29.5 30.0 30.6 31.2 31.7 32.3 32.8 33.4        
350 x 200 32.5 33.2 33.9 34.6 35.3 36.7 37.3 38.0 38.7 39.4 40.1 40.8 41.5        
300 x 300 26.2 26.9 27.5 28.2 28.8 30.2 30.8 31.5 32.1 32.8              
300 x 250 31.4 32.2 33.0 33.7 34.5 36.1 36.9 37.6 38.4 39.2              
300 x 200 39.0 40.0 41.0 41.9 42.9 44.9 45.9 46.8 47.8 48.8              



Slate Length in mm 50 55 60 65 75 80 85 90 95 100 105 110 115 120 125 130 150
600 batten gauge 275 273 270 268 263 260 258 255 253 250 248 245 243 240 238 235 225
m batten 3.64 3.68 3.72 3.75 3.83 3.87 3.90 3.94 3.98 4.01 4.05 4.09 4.13 4.17 4.20 4.24 4.44
holing gauge 335 338 340 343 348 350 353 355 358 360 363 365 368 370 373 375 385
550 batten gauge 250 248 245 243 238 235 233 230 228 225 223 220 218 215 213 210 200
m batten 4.00 4.05 4.10 4.14 4.24 4.39 4.33 4.38 4.43 4.47 4.52 4.57 4.62 4.67 4.71 4.76 5.00
holing gauge 310 313 315 318 323 325 328 330 333 335 338 340 343 345 348 350 360
500 batten gauge 225 223 220 218 213 210 208 205 203 200 198 195 193 190 188 185 175
m batten 4.44 4.50 4.56 4.61 4.73 4.79 4.85 4.90 4.96 5.02 5.08 5.14 5.19 5.25 5.31 5.37 5.71
holing gauge 285 288 290 293 298 300 303 305 308 310 313 315 318 320 323 325 335
450 batten gauge 200 198 195 193 188 185 183 180 178 175 173 170 168 165 163 160 150
m batten 5.00 5.08 5.16 5.23 5.39 5.47 5.54 5.62 5.70 5.78 5.85 5.93 6.01 6.09 6.16 6.24 6.67
holing gauge 260 263 265 268 273 275 278 280 283 285 288 290 293 295 298 300 310
400 batten gauge 175 173 170 168 163 160 158 155 153 150 148 145 143 140 138 135  
m batten 5.71 5.83 5.94 6.06 6.29 6.40 6.52 6.63 6.75 6.86 6.98 7.09 7.21 7.32 7.44 7.55  
holing gauge 235 238 240 243 248 250 253 255 258 260 263 265 268 270 273 275  
350 batten gauge 150 148 145 143 138 135 133 130 128 125 123 120 118        
m batten 6.67 6.79 6.91 7.03 7.27 7.39 7.51 7.63 7.75 7.87 7.99 8.11 8.23        
holing gauge 210 213 215 218 223 225 228 230 233 235 238 240 253        
300 batten gauge 125 123 120 118 113 110 108 105 103 100              
m batten 8.00 8.19 8.38 8.57 8.95 9.14 9.33 9.52 9.71 9.90              
holing gauge 185 188 190 193 198 200 203 205 208 210              





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