10 square feet = 0.1 square (roofing)

20 square feet = 0.2 square (roofing)

30 square feet = 0.3 square (roofing)

40 square feet = 0.4 square (roofing)

50 square feet = 0.5 square (roofing)

60 square feet = 0.6 square (roofing)

70 square feet = 0.7 square (roofing)

80 square feet = 0.8 square (roofing)

90 square feet = 1 square (roofing)

100 square feet = 1 square (roofing)

110 square feet = 1.1 squares (roofing)

120 square feet = 1.2 squares (roofing)

130 square feet = 1.3 squares (roofing)

140 square feet = 1.4 squares (roofing)

150 square feet = 1.5 squares (roofing)

160 square feet = 1.6 squares (roofing)

170 square feet = 1.7 squares (roofing)

180 square feet = 1.8 squares (roofing)

190 square feet = 2 squares (roofing)

200 square feet = 2 squares (roofing)

210 square feet = 2.1 squares (roofing)

220 square feet = 2.2 squares (roofing)

230 square feet = 2.3 squares (roofing)

240 square feet = 2.4 squares (roofing)

250 square feet = 2.5 squares (roofing)

260 square feet = 2.6 squares (roofing)

270 square feet = 2.7 squares (roofing)

280 square feet = 2.8 squares (roofing)

290 square feet = 3 squares (roofing)

300 square feet = 3 squares (roofing)

310 square feet = 3.1 squares (roofing)

320 square feet = 3.2 squares (roofing)

330 square feet = 3.3 squares (roofing)

340 square feet = 3.4 squares (roofing)

350 square feet = 3.5 squares (roofing)

360 square feet = 3.6 squares (roofing)

370 square feet = 3.7 squares (roofing)

380 square feet = 3.8 squares (roofing)

390 square feet = 4 squares (roofing)

400 square feet = 4 squares (roofing)