Skip To Content
PMEP
Pesticide Safety Education Program (PSEP)
Part of the Pesticide Management Education Program
Skip Navigation LinksPSEP > Fact sheets > Conv-Table
Conversion Tables

CONVERSION FACTORS USEFUL IN FIELD PLOT WORK

AREA EQUIVALENTS
      One Acre = 43,560 square feet
               = 160 square rods (rd)
               = 0.405 hectares (ha)
               = 4840 square yards
      One are     = 100 square meters
      One hectare = 100 are = 2.471 acres
      LIQUID EQUIVALENTS
      One U.S. Gal. = 4 qt = 8 pt = 16 cups
                    = 3.785 liters = 128 fluid ounces
                    = 231 cu inch
                    = 8.3370 pounds of water
                    = 3785.4 cu cm
      One qt = 0.9463 liters = 2 pt = 32 fl oz = 4 cups = 64 Tbs.
      One tablespoon (Tbs) = 14.8 ml = 3 teaspoons = 0.5 fl oz.
      Ounce (U.S. fluid) = 29.57 ml = 2 Tbs.
      Ounce (British fluid) = 28.41 ml
      TEMPERATURE EQUIVALENTS
      (Degree F - 32) X 5/9 = degrees Centigrade
      (Degree C X 9/5) + 32 = degrees Fahrenheit
      LENGTH EQUIVALENTS
      centimeter = 0.394 inch
      meter      = 3.28 feet = 39.4 inches
      kilometer  = 0.621 statute mile
      inch       = 2.54 centimeters
      foot       = 30.48 centimeters
      yard       = 0.914 meters
      rod (16.5 feet) = 5.029 meters
      statute mile (1,760 yards) = 1.61 kilometers
      WEIGHT EQUIVALENTS
      pound (avdp)(16 ounces) = 453.6 grams
      ton, gross or long (2,240 lb) = 1.016 metric ton
      ton, short or net (2,000 lb) = 0.907 metric ton
      milligram = 10 to the minus 3 grams
      microgram = 10 to the minus 6 grams
      nanogram = 10 to the minus 9 grams
      picogram = 10 to the minus 12 grams
      1 mg/kg or 1 mg/L = 1 ppm
      1 ug/kg or 1 ug/L = 1 ppb
      1 mg/g = 1000 ppm
      1 ug/g = 1 ppm
      1 nanogram/g = 1 ppb
      1 picogram/g = 1 ppt
      USEFUL CONVERSIONS
      Multiply               by                      To obtain
      foot candle            10.764                  lux
      gal (US)               3785                    cubic centimeters
      gal (US)               3.785                   liters
      gal (US)               0.83                    gal (Imperial)
      gal                    128                     fluid ounces
      gal/min                2.228 X 10 minus 3      cu ft/sec
      gal/acre               9.354                   L/ha
      hectares               2.471                   acres (US)
      kilograms              2.205                   pounds (advp)
      kg/ha                  0.892                   lb/acre
      liters                 0.0353                  cu ft
      liters                 1.05                    quarts (US)
      liters                 0.2642                  gal (US)
      liters/ha              0.107                   gal/acre
      meters                 3.281                   feet
      miles/hr               88                      feet/min
      miles/hr               1.61                    km/hr
      ounces (fluid)         29.573                  milliliters
      ounces                 28.35                   grams
      pounds                 453.59                  grams
      lb/gal                 0.12                    kg/L
      lb/sq inch             0.070                   1 kg/cm square cm (atm)
      lb/1000 sq ft          0.489                   kg/acre
      lb/acre                1.12                    kg/ha
      square inch            6.452                   cm square
      yards                  0.9144                  meters
      parts per million      2.719                   lb ai/acre foot of water
              AMOUNT OF FORMULATED CHEMICAL (ACTIVE INGREDIENT BASIS)
                TO BE PUT IN ONE GALLON TO APPLY ONE POUND PER ACRE
                      AT THE DESIGNATED GALLONAGE PER ACRE (1)
                                 SOLID FORMULATIONS
                                           Grams in each gal for 1 lb/A
      Active                                 at designated gallonage/A
      ingredient                      _______________________________________
      content                         10 gal/A                      15 gal/A
      _______________________________________________________________________
        10.0%                          453.39                        302.39
        18.5%                          245.19                        163.46
        20.0%                          226.80                        151.20
        25.0%                          181.44                        120.96
        30.0%                          151.20                        100.80
        33.3%                          136.08                         90.72
        35.0%                          129.60                         86.40
        40.0%                          113.40                         75.60
        45.0%                          100.80                         67.20
        50.0%                           90.72                         60.48
        55.0%                           82.47                         54.98
        60.0%                           75.60                         50.40
        65.0%                           69.78                         46.52
        70.0%                           64.80                         43.20
        75.0%                           60.48                         40.32
        79.3%                           57.20                         38.13
        80.0%                           56.70                         37.80
        85.0%                           53.36                         35.58
        90.0%                           50.40                         33.60
        95.0%                           47.75                         31.83
       100.0%                           45.36                         30.24
      ____________________
      (1) Calibrate sprayer for gallonage output of spray per unit time or
          unit area and convert to gallons per acre (1 Acre = 43,560 square
          feet).  Amounts per gallon, for other gallonages than those shown,
          can be easily calculated using the 10 gallon per acre as a base,
          i.e., to mix a spray for 35 gallons per acre of a formulation
          having 3 pounds active per gallon, use 126.18 divided by 3.5 = 36
          ml of formulation per gallon of spray; or to mix a spray for 7
          gallons per acre from the same formulation, use 126.18 divided by
          0.7 = 180 ml of formulation per gallon of spray.
                                LIQUID FORMULATIONS
      _______________________________________________________________________
      Pounds Active     Milliliters      Milliliters in Each Gal for 1 lb/A
      ingredient/gal    needed for           at designated gallonage/A
       formulation        1 gram       ______________________________________
                                       10 gal/A                    15 gal/A
      _______________________________________________________________________
           1.00            8.35         378.53                       252.48
           1.50            5.56         252.36                       168.24
           2.00            4.17         189.27                       126.24
           2.50            3.34         151.41                       100.99
           3.00            2.78         126.18                        84.12
           3.33            2.51         113.33                        75.56
           4.00            2.09          94.63                        63.09
           4.50            1.85          84.12                        56.11
           5.00            1.67          75.71                        50.47
           6.00            1.39          63.09                        42.06

AREA EQUIVALENTS
 One Acre 43,560 square feet
160 square rods (rd)
0.405 hectares (ha)
4840 square yards
 One are 100 square meters
 One hectare 100 are
2.471 acres

 


 

LIQUID EQUIVALENTS
One U.S. Gal.  4 qt = 8 pt = 16 cups
3.785 liters = 128 fluid ounces
231 cu inch
8.3370 pounds of water
3785.4 cu cm
 One qt. 0.9463 liters
2 pt
32 fl oz
4 cups
64 Tbs.
 One tablespoon (Tbs) 14.8 ml
3 teaspoons
0.5 fl oz.
 Ounce (U.S. fluid) 29.57 ml
2 Tbs.
 Ounce (British fluid) 28.41 ml

 


 

TEMPERATURE EQUIVALENTS
 (Degree F - 32) X 5/9 = degrees Centigrade
 (Degree C X 9/5) + 32 = degrees Fahrenheit

 


 

LENGTH EQUIVALENTS
 centimeter 0.394 inch
 meter 3.28 feet
39.4 inches
 kilometer 0.621 statute mile
 inch 2.54 centimeters
 foot 30.48 centimeters
 yard 0.914 meters
 rod (16.5 feet) 5.029 meters
 statute mile (1,760 yards) 1.61 kilometers

 


 

WEIGHT EQUIVALENTS
 pound (avdp)(16 ounces) 453.6 grams
 ton, gross or long (2,240 lb) 1.016 metric ton
 ton, short or net (2,000 lb) 0.907 metric ton
 milligram 10 to the minus 3 grams
 microgram 10 to the minus 6 grams
 nanogram 10 to the minus 9 grams 
 picogram 10 to the minus 12 grams
 1 mg/kg or 1 mg/L 1 ppm
 1 ug/kg or 1 ug/L 1 ppb
 1 mg/g 1000 ppm
 1 ug/g 1 ppm
 1 nanogram/g 1 ppb
 1 picogram/g 1 ppt

 


 

USEFUL CONVERSIONS
Multiply by To obtain
foot candle 10.764 lux
gal (US) 3785 cubic centimeters
gal (US) 3.785 liters
gal (US) 0.83 gal (Imperial)
gal 128 fluid ounces
gal/min 2.228 X 10 minus 3 cu ft/sec
gal/acre 9.354 L/ha
hectares 2.471 acres (US)
kilograms 2.205 pounds (advp)
kg/ha 0.892 lb/acre
liters 0.0353 cu ft
liters 1.05 quarts (US)
liters 0.2642 gal (US)
liters/ha 0.107 gal/acre
meters 3.281 feet
miles/hr 88 feet/min
miles/hr 1.61 km/hr
ounces (fluid) 29.573 milliliters
ounces 28.35 grams
pounds 453.59 grams
lb/gal 0.12 kg/L
lb/sq inch 0.07 1 kg/cm square cm (atm)
lb/1000 sq ft 0.489 kg/acre
lb/acre 1.12 kg/ha
square inch 6.452 cm square
yards 0.9144 meters
parts per million 2.719 lb ai/acre foot of water

 


 

Amount Of Formulated Chemical (Active Ingredient Basis) To Be Put In One Gallon To Apply One Pound Per Acre At The Designated Gallonage Per Acre (1)
SOLID FORMULATIONS
Active
Ingredient
Content
Grams in each gal for 1 lb/A
at designated gallonage/A
 10 gal/A 15 gal/A 
10% 453.39 302.39
18.5% 245.19 163.46
20% 226.8 151.2
25% 181.44 120.96
30% 151.2 100.8
33.3% 136.08 90.72
35% 129.6 86.4
40% 113.4 75.6
45% 100.8 67.2
50% 90.72 60.48
55% 82.47 54.98
60% 75.6 50.4
65% 69.78 46.52
70% 64.8 43.2
75% 60.48 40.32
79.3% 57.2 38.13
80% 56.7 37.8
85% 53.36 35.58
90% 50.4 33.6
95% 47.75 31.83
100% 45.36 30.24
(1) Calibrate sprayer for gallonage output of spray per unit time or unit area and convert to gallons per acre (1 Acre = 43,560 square feet). Amounts per gallon, for other gallonages than those shown, can be easily calculated using the 10 gallon per acre as a base, i.e., to mix a spray for 35 gallons per acre of a formulation having 3 pounds active per gallon, use 126.18 divided by 3.5 = 36 ml of formulation per gallon of spray; or to mix a spray for 7 gallons per acre from the same formulation, use 126.18 divided by 0.7 = 180 ml of formulation per gallon of spray.

 


 

LIQUID FORMULATIONS
Pounds Active ingredient/gal formulation Milliliters needed for 1 gram Milliliters in Each Gal for 1 lb/A at designated gallonage/A
10 gal/A 15 gal/A
1 8.35 378.53 252.48
1.5 5.56 252.36 168.24
2 4.17 189.27 126.24
2.5 3.34 151.41 100.99
3 2.78 126.18 84.12
3.33 2.51 113.33 75.56
4 2.09 94.63 63.09
4.5 1.85 84.12 56.11
5 1.67 75.71 50.47
6 1.39 63.09 42.06