تبدیل واحدهای علمی به یکدیگر

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

 

واحد مایعات 

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

 

 

واحد دما

 
 (Degree F - 32) x 5/9 = degrees Celsius 
 (Degree C x 9/5) + 32 = degrees Fahrenheit 

 

 

واحد طول
 centimeter 0.394 in.
 meter 3.28 ft
39.4 inches
 kilometer 0.621 statute mile
 inch 2.54 cm.
 foot 30.48 cm.
 yard 0.914 m.
 rod (16.5 feet) 5.029 m.
 statute mile (1,760 yards) 1.61 km.

 

 

واحد وزن

 
 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 10-3 grams
 microgram 10-6 grams
 nanogram 10-9 grams 
 picogram 10-12 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

 

 

واحدهای مفید

 
Multiply by To obtain
foot candle 10.764 lux
gal. (US) 3785 cu. cm.
gal. (US) 3.785 liters
gal. (US) 0.83 gal. (Imperial)
gal. 128 fl. oz.
gal./min. 2.228 x 10-3 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 qt. (US)
liters 0.2642 gal. (US)
liters/ha. 0.107 gal./acre
meters 3.281 feet
miles/hr 88 ft./min.
miles/hr 1.61 km./hr.
ounces (fluid) 29.573 ml.
ounces 28.35 grams
pounds 453.59 grams
lb./gal. 0.12 kg./L.
lb./sq. in. 0.07 kg./sq. cm.
lb./1000 sq. ft. 0.489 kg./acre
lb./acre 1.12 kg./ha
sq. in. 6.452 sq. cm.
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
per 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