Calculated Industries Pocket Handyman IV User Manual page 25

Divide by on-
center spacing
Add first stud
Roof Covering — Shingles
You're going to use 12" wide by 36"
long asphalt (strip) shingles with 5"
weather exposure. How many shingles
are required for a 1745 sq. ft. roof?
(Shingle exposure area = exposure x
length, and number of shingles = roof
area ÷ shingle exposure area)
Steps
Clear calculator
Find shingle
exposure area
Store in memory
Enter surface area 1745 [Sq] [Feet] 1745
Divide by
shingle area
Add 10% waste
[÷] 16 [Inch]
[=]
[+] 1 [=]
14.96875 (round to 15)
Keystrokes
[On/C] [On/C]
5 [Inch] [x]
36 [Inch] [=]
[M+]
[÷] [Rcl] [Rcl] [=]
[+] 10 [%]
1535.6 (1536 shingles)
User's Guide – 25
13.96875 (studs)
Display
180
180
M
1396 (shingles)
0.
SQ INCH
SQ INCH
SQ FEET