Useful Calculations Chart
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1Useful Calculations
Dilution Ratio
Cost To Use
Divide ounces per gallon into 128
Divide dilution into cost per gallon
Example: 1-1/2oz., per gallon dilution
Example One:
128 ÷ 1.5 = 85
1:256 dilution selling at $12.30 per gallon
Answer: 1:85 dilution
$12.30 ÷ 257 =0.48 or 4.8¢ per diluted gallon
Note:
Example two:
It is necessary to first convert dilution to ounces for one gallon.
1:10 dilution selling at $4.00 per gallon
Example: Dilution is 10 ounces per 5 gallons.
$4.00 ÷ 11 = 0.36 or 36¢ per diluted gallon
Divide 10 by 5 (10 ÷ 5 = 2)
Ounces Per Gallon
Answer: two ounces per gallon.
Divide dilution ratio into 128
Now divide the ounces per gallon into 128 (128 ÷ 2 = 64).
Examples:
Answer: Use dilution is 1:64
1:85 dilution
Metric Volume Equivalents
3 teaspoons =
1 tablespoon =
15 ml
128 ÷ 85 = 1.5
8 tablespoons =
1/2 cup =
118 ml
16 tablespoons =
1 cup =
237 ml
Answer: 1.5 ounces per gallon
1 fluid ounce =
2 tablespoons =
30 ml
Temperature Conversions
8 fluid ounces =
1 cup =
237 ml
16 fluid ounces =
2 cups or 1 pint =
473 ml
°F = 9/5 (°C) + 32
32 fluid ounces =
4 cups or 1 quart =
946 ml
°C = 5/9 (°F - 32)
128 fluid ounces =
1 gallon =
3.8 liters
U.S. Volume Equivalents
Dilution Chart
Teaspoon
Tablespoon
Ounce
Cup
Pint
Quart
Dilution
Ounces Per
Ration
Gallon
One Tbs. =
3
1
1/2
1/16
1/32
-
1 to 4
32
One Oz. =
6
2
1
1/8
1/16
1/32
1 to 5
26
One Cup =
48
16
8
1
1/2
1/4
1 to 10
12
One Pint =
96
32
16
2
1
1/2
1 to 12
10
One Qt. =
192
64
32
4
2
1
1 to 15
8
One Gal. =
768
256
128
16
8
4
1 to 20
6
Parts Per Million (P.P.M.) of Active Disinfectant in Various Use-Dilution Ratios:
1 to 32
4
Multiply percentage of active disinfectant times 10,000 and divide by use-dilution rate:
1 to 40
3
Example 1:
Example 2:
1 to 50
2-1/2
1 to 60
2
Given active percentage is 4.5%
At 1:128 (1oz. per gallon)
1 to 64
2
1 to 100
1
At 1:256 (1/2oz. per gallon)
(4.5 x 10,000) ÷ 128 = 352 ppm active
1 to 128
1
(4.5 x 10,000) ÷ 256 = 176ppm active
1 to 256
1/2
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