Conversion Charts

To ConvertIntoMultiply By
acres rods 160
acres hectare 0.4047
acres sq feet 43,560
acres sq meters 4,047
acres sq miles 1.562 x 10-3
acre-feet cu feet 43,560
acre-feet gallons 3.259 x 105
atmospheres ton/sq inch 0.007348
atmospheres kgs/sq meter 10,332
atmospheres pounds/sq inch 14.7
bars atmospheres 0.9869
bars kgs/sq meter 1.020 x 104
bars pounds/sq ft 2,089
bushels cu ft 1.2445
bushels cu meters 0.03524
bushels liters 35.24
bushels pecks 4
bushels (60 lbs)/acre kilograms/hectare 67.26
centigrade fahrenheit (Cº x 9/5) + 32
centimeters inches 0.3937
centimeters meters 0.01
centimeters miles 393.7
centimeters of mercury atmospheres 0.01316
circumference radians 6.283
cubic feet cu meters 0.02832
cubic feet gallons 7.48052
cubic feet liters 28.32
cubic feet/min gallons/sec 0.1247
cubic feet/min liters/sec 0.472
cubic meters gallons 264.2
cubic meters liters 1,000
cubic meters/hectare cubic ft/acre 14.2916
fathom meter 1.828804
fathom feet 6
feet meter 0.3048
feet/sec kms/hr 1.097
feet/sec miles/hr 0.6818
footcandle lumen/sq meter 10.764
furlongs miles 0.125
gallons liters 3.785
gallons/acre liters/hectare 9.354
gallons pounds of water 8.3453.
gallons/min cu ft/sec 2,228 x 10-3
gallons/min liters/sec 0.06308
grams ounces (avdp) 0.03527
grain grams 0.648
grams pounds 2.205 x 10-3
grams/hectare ounces/acre 0.01428
grams ai/hectare pounds ai/acre 0.00089
grams/liter pounds/1000 gal 8.345
grams/liter parts/million 1,000
grams/liter pounds/gallon 0.008
hectares acres 2.471
hundredweight/acre kilograms/hectare 125.6
inches centimeters 2.54
inches of mercury atmospheres 0.03342
kilograms pounds 2.205
kilograms/hectare pounds/acre 0.8922
kilometer miles 0.6214
knots kilometer/hr 1.8532
knots miles/hr 1.151
litre/hectare fluid ounces/acre 13.68
liter/hectare gallons/acre 0.1069
liters gallons 0.2642
meter inches 39.37
meters feet 3.281
meters/sec kilometers/hr 3.6
meters/sec miles/hr 2.237
miles feet 5,280
miles kilometers 1.609
ounces grams 28.349527
ounces pounds 0.0625
ounces (fluid) liters 0.02957
ounces (fluid) milliliters 29.573
quarts liters 0.9463
peck (U.S.) bushels 0.25
pint liter 0.4732
pounds grams 453.5924
pounds kilograms 0.4536
pounds of water gallons 0.1198
pounds/acre kilograms/hectare 1.121
pound/gallon gram/liter 119.8
rods feet 16.5
sq centimeters sq inches 0.155
sq feet sq meters 0.093
sq feet sq yards 0.1111
sq kilometers acres 247.1
sq kilometers sq miles 0.3861
sq meters sq feet 10.76
sq miles acres 640
sq miles sq kilometers 2.59
sq yards sq feet 9
sq yards sq meters 0.8361
temperature (Cº) + 17.78 temperature (Fº) 1.8
temperature (Fº) - 32 temperature (Cº) 0.56
tons (metric) kilograms 1,000
tons (metric) pounds 2,205
tons tons (metric) 0.9078
ton (2,000 lbs)/acre metric tons/hectare 2.242
yards meters 0.9144

Metrics in Weed Control

Conversion Factors Common to Weed Control
(ha) Hectares = Acres X 0.405
(kPa) Kilo Pascals = Pounds per square inch x 6.9
(km/h) Kilometers per hour = Miles per hour x 1.61
Bench Marks
16 hectares = 40 acres
64 hectares = 160 acres
200 kilo Pascals = 29 pounds per square inch
250 kilo Pascals = 36 pounds per square inch
275 kilo Pascals = 40 pounds per square inch
300 kilo Pascals = 43 pounds per square inch
4.8 km/h = 3 mph
6.4 km/h = 4 mph
8.0 km/h = 5 mph
9.5 km/h = 6 mph
1 gallon per acre = 9.35 liters per hectare
1 mile = 5,280 feet = 1,610 meters = 1.61 kilometers

Pressure

1 foot lift of water = 0.433 pound pressure per square inch (psi)
1 pound pressure per square inch will lift water 2.31 feet
1 atmosphere = 760 millimeters of mercury; 14.7 pounds; 33.9 feet of water
1 pound per square inch (psi) = 0.070 kg/cm² or 6.895 kPa (kilopascal)

Length of Row Required for One Acre

To ConvertInto
24 in. 7,260 yards = 21,780 ft.
30 in. 5,808 yards = 17,424 ft.
36 in. 4,840 yards = 14,520 ft.
42 in. 4,149 yards = 12,445 ft.
48 in. 3,630 yards = 10,890 ft.

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