Calculators & Conversions
Time to Square Foot per Hour Conversion
To calculate total square footage measurements per hour use the formula below.
60 / ISSA Min. = ___________x # square feet = per hour
First divide 60 (minutes) by the listed ISSA time per 1000 square feet. The total of this calculation multiplied by 1000 gives you the number of square feet per hour that may be accomplished by performing this task. Remember that many factors can affect this number in your particular facility.
Example:
Task #187 "Dust mop with a 24" Mop using Dust Treatment Chemical" @ 7.2 minutes per 1000 square feet.
Calculation:
60 / 7.2 = 8.333 x 1000 = 8333 square feet per hour
Work Time Conversion Chart
|
Seconds = Wkr Hrs
|
|
1
|
0.0003
|
|
2
|
0.0005
|
|
3
|
0.0008
|
|
4
|
0.0011
|
|
5
|
0.0014
|
|
6
|
0.0017
|
|
7
|
0.0019
|
|
8
|
0.0022
|
|
9
|
0.0025
|
|
10
|
0.0028
|
|
15
|
0.0042
|
|
20
|
0.0055
|
|
25
|
0.0069
|
|
30
|
0.0083
|
|
35
|
0.0097
|
|
40
|
0.0111
|
|
45
|
0.0125
|
|
50
|
0.0138
|
|
55
|
0.0153
|
|
60
|
0.0167
|
|
Mins = Wkr Hours
|
|
1
|
0.01670
|
|
2
|
0.03330
|
|
3
|
0.05000
|
|
4
|
0.06670
|
|
5
|
0.08333
|
|
6
|
0.10000
|
|
7
|
0.11670
|
|
8
|
0.13330
|
|
9
|
0.15000
|
|
10
|
0.16670
|
|
15
|
0.25000
|
|
20
|
0.33330
|
|
25
|
0.41670
|
|
30
|
0.50000
|
|
35
|
0.58330
|
|
40
|
0.66670
|
|
45
|
0.75000
|
|
50
|
0.83333
|
|
55
|
0.91670
|
|
60
|
1.00000
|
|
Hrs/Mins = Wkr Hrs
|
|
1 Hr 5 Min
|
1.0833
|
|
1 Hr 10 Min
|
1.0833
|
|
1 Hr 15 Min
|
1.2500
|
|
1 Hr 20 Min
|
1.3333
|
|
1 Hr 25 Min
|
1.4167
|
|
1 Hr 30 Min
|
1.5000
|
|
1 Hr 35 Min
|
1.5833
|
|
1 Hr 40 Min
|
1.6667
|
|
1 Hr 45 Min
|
1.7500
|
|
1 Hr 50 Min
|
1.8333
|
|
1 Hr 55 Min
|
1.9167
|
|
2 Hr
|
2.0000
|
|
2 Hr 5 Min
|
2.0833
|
|
2 Hr 10 Min
|
2.1667
|
|
2 Hr 15 Min
|
2.2500
|
|
2 Hr 20 Min
|
2.3333
|
|
2 Hr 25 Min
|
2.4167
|
|
2 Hr 30 Min
|
2.5000
|
|
2 Hr 35 Min
|
2.5833
|
|
2 Hr 40 Min
|
2.6667
|
Team Cleaning
|
Time No.
|
Team Cleaning Task
|
Size/Qty
|
Square Meters
|
Minutes
|
|
350
|
Light Duty
Specialist
Office Building
Cleaning
|
1000 Sq Ft
|
100
|
6
|
|
351
|
Vacuum Specialist
Office Building
Cleaning
|
1000 Sq Ft
|
100
|
6
|
|
352
|
Restroom Specialist
Office Building
Cleaning
|
Each Fixture
|
|
2
|
|
353
|
Light Duty
Specialist
School Cleaning w/o
Sink in Classrom
|
Each Room
|
|
4.5
|
|
354
|
Light Duty
Specialist
School Cleaning with
Sink in Classrom
|
Each Room
|
|
5.75
|
|
355
|
Vacuum Specialist
School Cleaning
|
Each Room
|
|
7.50
|
|
356
|
Restroom Specialist
School Cleaning
|
Each Fixture
|
|
3
|
|
357
|
Check-in and Travel to Area
Beginning of Shift
|
Each
|
|
2
|
|
358
|
Equipment Clean-up
and Restock
End of Shift
|
Each
|
|
5
|
Direct and Simple Metric Conversion
Direct Metric Conversion
|
|
Application
|
Square Meters
Per Gallon
|
|
Stripper Application
|
9.3 m2 per 3.785 liters
|
|
Wet Mop
|
18.60 m2 per 3.785 liters
|
|
Damp Mop
|
37.20 m2 per 3.785 liters
|
|
Auto Scrub with Gravity Feed Tank
|
46.50 m2 per 3.785 liters
|
|
Auto Scrub with Solution dosing
|
69.75 m2 per 3.785 liters
|
|
Floor Seal Application
|
139.50 m2 per 3.785 liters
|
|
Floor Finish Application
|
186.00 m2 per 3.785 liters
|
Simple Metric Conversion
|
|
Application
|
Square Meters
Per Gallon
|
|
Stripper Application
|
2.46 m2 per 3.785 liters
|
|
Wet Mop
|
4.91 m2 per 3.785 liters
|
|
Damp Mop
|
9.85 m2 per 3.785 liters
|
|
Auto Scrub with Gravity Feed Tank
|
12.2 m2 per 3.785 liters
|
|
Auto Scrub with Solution dosing
|
18.4 m2 per 3.785 liters
|
|
Floor Seal Application
|
36.9 m2 per 3.785 liters
|
|
Floor Finish Application
|
49.1 m2 per 3.785 liters
|
Coverage of Various Solutions
|
Solution
|
Sq Ft / Gal
|
|
Stripper Solution
|
100
|
|
Wet Moop Solution
|
200
|
|
Damp Mop Solution
|
400
|
|
Auto Scrub with Gravity Feed Tank
|
500
|
|
Auto Scrub with Solution Dosing
|
750
|
|
Floor Seal (water based) Application
|
1500
|
|
Floor Finish (water based) Application
|
2000
|
Weights and Measures
- 100 pounds
- =
- 45.35 kilograms
- 40 pounds
- =
- 18.14 kilograms
- 15 pounds
- =
- 6.79 kilograms
- 1 pound (16 oz.)
- =
- 0.45 kilograms
- 1 ounce
- =
- 28.35 grams
- 55 gallons
- =
- 208.18 liters
- 30 gallons
- =
- 113.55 liters
- 5 gallons
- =
- 18.93 liters
- 1 gallon (128 fl. oz.)
- =
- 3.79 liters
- 1 gallon water
- =
- 8.34 lbs.
- 1 quart (32 fl. oz.)
- =
- 0.95 liters
- 1 pint (16 fl. oz.)
- =
- 0.47 liters
- 1 cup (8 fl. oz.)
- =
- 0.24 liters
- 1 fl. oz. (8 fl. drams)
- =
- 29.57 milliliters
- 1 fluid dram
- =
- 3.70 milliliters
- 1 kilogram
- =
- 2.205 pounds
- 1 gram
- =
- 0.353 ounce
- 1 milliliter
- =
- 0.27 fl. dr. (0.034 fl. oz.)
- 1 centiliter
- =
- 0.34 fluid ounce
- 1 deciliter
- =
- 3.38 fluid ounces
- 3 liters
- =
- .792 gallons
- 1 liter
- =
- 33.81 fluid ounces
- 1 liter
- =
- 1.057 quarts
- 1 liter
- =
- .264 gallons
- 1 cubic centimeter
- =
- 0.061 cu. Inch
- 1 centimeter
- =
- 0.39 inch
- 1 meter
- =
- 39.37 inches
pH Scale
The pH scale measures the amount of acidity or basicity in a chemical solution. Each number is ten times larger than the next number. Thus a pH of 1 is 10 times more acidic than a pH of 2; a pH of 2 is 100 times more acidic than a pH of 4. pH is derived from the Greek word for "Potency" and H is the symbol for hydrogen - thus, pH stands for the potency of the hydrogen ion in an aqueous solution.
|
Substance
|
pH
|
|
Battery Acid
|
0.5
|
|
Gastric Acid
|
1.5 - 2.0
|
|
Lemon Juice
|
2.4
|
|
Cola
|
2.5
|
|
Vinegar
|
2.9
|
|
Orange or apple juice
|
3.5
|
|
Beer
|
4.5
|
|
Acid Rain
|
5.0
|
|
Coffee
|
5.0
|
|
Tea or Healthy Skin
|
5.5
|
|
Milk
|
6.5
|
|
Pure Water
|
7.0
|
|
Healthy Human Saliva
|
6.5 - 7.4
|
|
Blood
|
7.34 - 7.45
|
|
Sea water
|
8.0
|
|
Hand Soap
|
9.0 - 10.0
|
|
Household Ammonia
|
11.5
|
Note the following:
- Urine fluctuates from 5.5 to 8.0 depending on age, sex, food consumption, etc.
- Never mix cleaning chemicals, especially those found on opposite sides of the pH scale because adverse reactions or neutralization of the mixture may occur.
- All pH values are approximates.
- Solvents do not have a pH because they do not ionize in aqueous solution.
- pH does not measure the corrosiveness of an acid (i.e., HCL with a pH of 1 is stronger than Phosphoric with a pH of 1).
Dilution Talbe: Cost Per Gallon RTU
|
Cost
|
.5 oz/gl
1:256
|
1 oz/gl
1:128
|
2 oz/gl
1:64
|
4 oz/gl
1:32
|
6.4 oz/gl
1:20
|
12.8 oz/gl
1:10
|
32 oz/gl
1:4
|
|
$3.00
|
$0.01
|
$0.02
|
$0.05
|
$0.09
|
$0.14
|
$0.27
|
$0.60
|
|
$3.50
|
$0.01
|
$0.03
|
$0.05
|
$0.11
|
$0.17
|
$0.32
|
$0.70
|
|
$4.00
|
$0.02
|
$0.03
|
$0.06
|
$0.12
|
$0.19
|
$0.36
|
$0.80
|
|
$4.50
|
$0.02
|
$0.03
|
$0.07
|
$0.14
|
$0.21
|
$0.41
|
$0.90
|
|
$5.00
|
$0.02
|
$0.04
|
$0.08
|
$0.15
|
$0.24
|
$0.45
|
$1.00
|
|
$5.50
|
$0.02
|
$0.04
|
$0.08
|
$0.17
|
$0.26
|
$0.50
|
$1.10
|
|
$6.00
|
$0.02
|
$0.05
|
$0.09
|
$0.18
|
$0.29
|
$0.55
|
$1.20
|
|
$6.50
|
$0.03
|
$0.05
|
$0.10
|
$0.20
|
$0.31
|
$0.59
|
$1.30
|
|
$7.00
|
$0.03
|
$0.05
|
$0.11
|
$0.21
|
$0.33
|
$0.64
|
$1.40
|
|
$7.50
|
$0.03
|
$0.06
|
$0.12
|
$0.23
|
$0.36
|
$0.68
|
$1.50
|
|
$8.00
|
$0.03
|
$0.06
|
$0.12
|
$0.24
|
$0.38
|
$0.73
|
$1.60
|
|
$8.50
|
$0.03
|
$0.07
|
$0.13
|
$0.26
|
$0.40
|
$0.77
|
$1.70
|
|
$9.00
|
$0.04
|
$0.07
|
$0.14
|
$0.27
|
$0.43
|
$0.82
|
$1.80
|
|
$9.50
|
$0.04
|
$0.07
|
$0.15
|
$0.29
|
$0.45
|
$0.86
|
$1.90
|
|
$10.00
|
$0.04
|
$0.08
|
$0.15
|
$0.30
|
$0.48
|
$0.91
|
$2.00
|
|
$10.50
|
$0.04
|
$0.08
|
$0.16
|
$0.32
|
$0.50
|
$0.95
|
$2.10
|
|
$11.00
|
$0.04
|
$0.09
|
$0.17
|
$0.33
|
$0.52
|
$1.00
|
$2.20
|
|
$11.50
|
$0.04
|
$0.09
|
$0.18
|
$0.35
|
$0.55
|
$1.05
|
$2.30
|
|
$12.00
|
$0.05
|
$0.09
|
$0.18
|
$0.36
|
$0.57
|
$1.09
|
$2.40
|
|
$12.50
|
$0.05
|
$0.10
|
$0.19
|
$0.38
|
$0.60
|
$1.14
|
$2.50
|
|
$13.00
|
$0.05
|
$0.10
|
$0.20
|
$0.39
|
$0.62
|
$1.18
|
$2.60
|
|
$13.50
|
$0.05
|
$0.10
|
$0.21
|
$0.41
|
$0.64
|
$1.23
|
$2.70
|
|
$14.00
|
$0.05
|
$0.11
|
$0.22
|
$0.42
|
$0.67
|
$1.27
|
$2.80
|
|
$14.50
|
$0.06
|
$0.11
|
$0.22
|
$0.44
|
$0.69
|
$1.32
|
$2.90
|
|
$15.00
|
$0.06
|
$0.12
|
$0.23
|
$0.45
|
$0.71
|
$1.36
|
$3.00
|
|
$15.50
|
$0.06
|
$0.12
|
$0.24
|
$0.47
|
$0.74
|
$1.41
|
$3.10
|
|
$16.00
|
$0.06
|
$0.12
|
$0.25
|
$0.48
|
$0.76
|
$1.45
|
$3.20
|
|
$16.50
|
$0.06
|
$0.13
|
$0.25
|
$0.50
|
$0.79
|
$1.50
|
$3.30
|
|
$17.00
|
$0.07
|
$0.13
|
$0.26
|
$0.52
|
$0.81
|
$1.55
|
$3.40
|
|
$17.50
|
$0.07
|
$0.14
|
$0.27
|
$0.53
|
$0.83
|
$1.59
|
$3.50
|
|
$18.00
|
$0.07
|
$0.14
|
$0.28
|
$0.55
|
$0.86
|
$1.64
|
$3.60
|
|
$18.50
|
$0.07
|
$0.14
|
$0.28
|
$0.56
|
$0.88
|
$1.68
|
$3.70
|
|
$19.00
|
$0.07
|
$0.15
|
$0.29
|
$0.58
|
$0.90
|
$1.73
|
$3.80
|
|
$19.50
|
$0.08
|
$0.15
|
$0.30
|
$0.59
|
$0.93
|
$1.77
|
$3.90
|
|
$20.00
|
$0.08
|
$0.16
|
$0.31
|
$0.61
|
$0.95
|
$1.82
|
$4.00
|
|
$20.50
|
$0.08
|
$0.16
|
$0.32
|
$0.62
|
$0.98
|
$1.86
|
$4.10
|
|
$21.00
|
$0.08
|
$0.16
|
$0.32
|
$0.64
|
$1.00
|
$1.91
|
$4.20
|
|
$21.50
|
$0.08
|
$0.17
|
$0.33
|
$0.65
|
$1.02
|
$1.95
|
$4.30
|
|
$22.00
|
$0.09
|
$0.17
|
$0.34
|
$0.67
|
$1.05
|
$2.00
|
$4.40
|
|
$22.50
|
$0.09
|
$0.17
|
$0.35
|
$0.68
|
$1.07
|
$2.05
|
$4.50
|
|
$23.00
|
$0.09
|
$0.18
|
$0.35
|
$0.70
|
$1.10
|
$2.09
|
$4.60
|
|
$23.50
|
$0.09
|
$0.18
|
$0.36
|
$0.71
|
$1.12
|
$2.14
|
$4.70
|
|
$24.00
|
$0.09
|
$0.19
|
$0.37
|
$0.73
|
$1.14
|
$2.18
|
$4.80
|
|
$24.50
|
$0.10
|
$0.19
|
$0.38
|
$0.74
|
$1.17
|
$2.23
|
$4.90
|
|
$25.00
|
$0.10
|
$0.19
|
$0.38
|
$0.76
|
$1.19
|
$2.27
|
$5.00
|
To determine cost per quart, divide about RTU cost by 4
Formula: Cost ÷ RTU gallons produced
Ex: Dilution = 1.64 (1 gallon produces 65 gallons of RTU)
Cost of Concentrate = $12.00 per gallon
Calculation: $12.00 ÷ 65 gallons = .185 = 19 cents per RTU gallon
Dilution Ratios: Concentrate Needed to Fill Spedified Container Sizes
|
Dilution Ratio
|
Spray Bottle 24 oz
|
Quart
32 oz.
|
Gallon 128 oz.
|
5 Gallon
640 oz.
|
|
1:04
|
4-3/4 oz
|
6-1/2 oz
|
25-1/2 oz
|
128 oz (1 gal)
|
|
1:06
|
3-12 oz
|
4-1/2 oz
|
18-1/4 oz
|
91-1/2 oz
|
|
1:08
|
2-12 oz
|
3-1/2 oz
|
14-1/2 oz
|
71 oz
|
|
1:10
|
2-1/4 oz
|
2-1/2 oz
|
11-1/2 oz
|
59 oz
|
|
1:12
|
1-3/4 oz
|
2-1/2 oz
|
9-3/4 oz
|
49-1/4 oz
|
|
1:14
|
1-1/2 oz
|
2-1/4 oz
|
8-1/2 oz
|
42-1/2 oz
|
|
1:16
|
1-1/2 oz
|
1-3/4 oz
|
7-1/2 oz
|
37-1/2 oz
|
|
1:18
|
1-1/4 oz
|
1-1/2 oz
|
6-3/4 oz
|
33-1/2 oz
|
|
1:20
|
1 oz
|
1-1/2 oz
|
6 oz
|
31 oz
|
|
1:32
|
3/4 oz
|
1 oz
|
4 oz
|
20 oz
|
|
1:48
|
3/8 oz
|
3/4 oz
|
3 oz
|
15 oz
|
|
1:64
|
1/3 oz
|
1/2 oz
|
2 oz
|
10 oz
|
|
1:128
|
1/5 oz
|
1/4 oz
|
1 oz
|
5 oz
|
|
1:256
|
1/10 oz
|
1/8 oz
|
1/2 oz
|
3 oz
|
|
1:512
|
1/20 oz
|
1/16 oz
|
1/4 oz
|
1-1/2 oz
|
FORMULA: Divide container size in ounces by sum of the dilution ratio
EX: To fill a 32 oz bottle at a 1:64 dilution
32 oz ÷(1+64) = .49 oz or approximately ½ oz.
Micron, Mil, Gauge Conversion Chart
|
Microns
|
Mils
|
Gauge
|
Inch
|
|
|
|
7.00
|
0.276
|
27.6
|
0.000276
|
|
1 in = 1,000 Mils
|
|
7.50
|
0.295
|
29.5
|
0.000295
|
|
1 in = 100,000 Gauge
|
|
7.62
|
0.300
|
30.0
|
0.000300
|
|
1 in = 25,400 Microns
|
|
8.00
|
0.315
|
31.5
|
0.000315
|
|
|
|
8.50
|
0.335
|
33.5
|
0.000335
|
|
1 Micron = 0.03937 Mils
|
|
8.89
|
0.350
|
35.0
|
0.000350
|
|
|
|
9.00
|
0.354
|
35.4
|
0.000354
|
|
1 Micron = 3.937 Gauge
|
|
9.50
|
0.374
|
37.4
|
0.000374
|
|
1 Mils = 100 Gauge
|
|
10.00
|
0.394
|
39.4
|
0.000394
|
|
|
|
10.16
|
0.400
|
40.0
|
0.000400
|
|
|
|
10.50
|
0.413
|
41.3
|
0.000413
|
|
|
|
11.00
|
0.433
|
43.3
|
0.000433
|
|
|
|
11.43
|
0.450
|
45.0
|
0.000450
|
|
|
|
11.50
|
0.453
|
45.3
|
0.000453
|
|
|
|
12.00
|
0.472
|
47.2
|
0.000472
|
|
|
|
12.50
|
0.492
|
49.2
|
0.000492
|
|
|
|
12.70
|
0.500
|
50.0
|
0.000500
|
|
|
|
13.00
|
0.512
|
51.2
|
0.000512
|
|
|
|
13.50
|
0.531
|
53.1
|
0.000531
|
|
|
|
13.97
|
0.550
|
55.0
|
0.000550
|
|
|
|
14.00
|
0.551
|
55.1
|
0.000551
|
|
|
|
14.50
|
0.571
|
57.1
|
0.000571
|
|
|
|
15.00
|
0.591
|
59.1
|
0.000591
|
|
|
|
15.24
|
0.600
|
60.0
|
0.000600
|
|
|
|
15.50
|
0.610
|
61.0
|
0.000610
|
|
|
|
16.00
|
0.630
|
63.0
|
0.000630
|
|
|
|
16.50
|
0.650
|
65.0
|
0.000650
|
|
|
|
17.00
|
0.669
|
66.9
|
0.000669
|
|
|
|
17.50
|
0.689
|
68.9
|
0.000689
|
|
|
|
17.78
|
0.700
|
70.0
|
0.000700
|
|
|
|
18.00
|
0.709
|
70.9
|
0.000709
|
|
|
|
18.50
|
0.728
|
72.8
|
0.000728
|
|
|
|
19.00
|
0.748
|
74.8
|
0.000748
|
|
|
|
19.05
|
0.750
|
75.0
|
0.000750
|
|
|
|
19.50
|
0.768
|
76.8
|
0.000768
|
|
|
|
20.00
|
0.787
|
78.7
|
0.000787
|
|
|
|
20.32
|
0.800
|
80.0
|
0.000800
|
|
|
|
20.50
|
0.807
|
80.7
|
0.000807
|
|
|
|
21.00
|
0.827
|
82.7
|
0.000827
|
|
|
|
21.50
|
0.846
|
84.6
|
0.000846
|
|
|
|
21.59
|
0.850
|
85.0
|
0.000850
|
|
|
|
22.00
|
0.866
|
86.6
|
0.000866
|
|
|
|
22.50
|
0.886
|
88.6
|
0.000886
|
|
|
|
22.86
|
0.900
|
90.0
|
0.000900
|
|
|
|
23.00
|
0.906
|
90.6
|
0.000906
|
|
|
|
24.13
|
0.950
|
95.0
|
0.000950
|
|
|
|
25.40
|
1.000
|
100.0
|
0.001000
|
|
|
|
27.94
|
1.100
|
110.0
|
0.001100
|
|
|
|
30.48
|
1.200
|
120.0
|
0.001200
|
|
|
|
33.02
|
1.300
|
130.0
|
0.001300
|
|
|
|
35.56
|
1.400
|
140.0
|
0.001400
|
|
|
|
38.10
|
1.500
|
150.0
|
0.001500
|
|
|
|
40.64
|
1.600
|
160.0
|
0.001600
|
|
|
|
43.18
|
1.700
|
170.0
|
0.001700
|
|
|
|
45.72
|
1.800
|
180.0
|
0.001800
|
|
|
|
48.26
|
1.900
|
190.0
|
0.001900
|
|
|
|
50.80
|
2.000
|
200.0
|
0.002000
|
|
|
|
63.50
|
2.500
|
250.0
|
0.002500
|
|
|
|
76.20
|
3.000
|
300.0
|
0.003000
|
|
|