Sunday, February 9, 2020

HP 11C: Construction: Calculating the Number of Tiles

HP 11C:  Construction:  Calculating the Number of Tiles

Introduction



The 11C program presented will calculate the number of tiles needed for a rectangular room given:

*  room length and width, in feet
*  tile length and width, in feet
*  grout applied, if any, in inches
*  waste allowance %



For example, for a room of dimensions 12 feet 6 inches by 16 feet 8 inches, enter the room dimensions as 12.5 (12 + 6/12) and 16.66666667 (16 + 8/12), respectively.

Instructions:

Outside of User Mode:
Enter room length [ENTER] room width [ f ] [ A ]
Enter tile length [ENTER] tile width [ f ] [ B ]
Enter grout width [ f ] [ C ]
Enter waste allowance [ f ] [ D ]
Calculate the number of tiles, [ f ] [ E ]

In User Mode:
Enter room length [ENTER] room width [ √ ] (A)
Enter tile length [ENTER] tile width [ e^x ] (B)
Enter grout width [ 10^x ] (C)
Enter waste allowance [ y^x ] (D)
Calculate the number of tiles, [ 1/x ] (E)

Variables:
R1 = tile length (ft)
R2 = tile width (ft)
R3 = grout (in)
R4 = room length (ft)
R5 = room width (ft)
R6 = waste %

Number of tiles =

ceiling( (room length * room width) / ((tile length + grout) * (tile width + grout)) * (1 + waste%)

ceiling:  next highest integer

HP 11C Program: Number of Tiles

Step:  Key Code:  Key

001:  42,21,11:  LBL A
002:  44,5:  STO 5
003:  34:   X<>Y
004:  44, 4:  STO 4
005:  43, 32:  RTN

006:  42, 21, 12:  LBL B
007:  44, 1:  STO 1
008:  34:  X<>Y
009:  44, 2:  STO 2
010:  43, 32:  RTN

011:  42, 21, 13:  LBL C
012:  1:  1
013:  2:  2
014:  10:  ÷
015:  44, 3:  STO 3
016:  43, 32:  RTN

017:  42, 21, 14:  LBL D
018:  44, 6:  STO 6
019:  43, 32:  RTN

020:  42, 21, 15:  LBL E
021:  45, 5:  RCL 5
022:  45, 4:  RCL 4
023:  20:  *
024:  45, 1:  RCL 1
025:  45, 3:  RCL 3
026:  40:  +
027:  45, 2:  RCL 2
028:  45, 3:  RCL 3
029:  40:  +
030:  20:  *
031:  10:  ÷
032:  45, 6:  RCL 6
033:  43, 14:  %
034:  40:  +
035:  36:  ENTER
036:  42, 44:  X=0
037:  43, 40:  FRAC
038:  22, 0:  GTO 0
039:  33:  R↓
040: 1:  1
041: 40: +
042: 22,1:  GTO 1 
043: 42,21,0:  LBL 0
044: 33: R↓
045: 42,21,1:  LBL 1
046: 43, 44: INT
047: 43, 32: RTN

Example

Room Dimensions:  14 feet by 13.5 feet
Tile Dimensions:  1 foot by 1 foot
Grout: 1/8 inch (0.125 inch)
Waste Percentage:  5

Result:  Number of Tiles:  195

Eddie

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