Conversion Factors and Tables - USDA

1 1 Conversion Factors and Tables Nutrient Management Module 7 Length Unit of measure Symbol mm cm m km in ft mi millimeter mm 1 --- - centimeter cm 10 1 --- - meter m 1000 100 1 -- kilometer km -- -- 1000 1 3,281 inch in 1 - foot ft --- 12 1 -- mile mi --- -- 1609 --- 5280 1 Area Unit of measure Symbol m2 ha km2 ft2 acre mi2 square meter m2 1 --- --- --- --- hectare ha 10,000 1 107,640 square kilometer km2 1x106 100 1 ---- 247 acre acre 4,049 --- 43,560 1 square mile mi2 259 --- 640 1 Volume Unit of measure Symbol km3 m3 L Mgal acre-ft ft3 gal cubic kilometer km3 1 lxl09 -- -- 811,000 cubic meter m3 -- 1 1000 -- -- 264 liter L 1 million gallons Mgal -- -- -- 1 134.

2 000 1x106 acre-foot acre-ft -- 1,233 -- 1 43,560 325,848 cubic foot ft3 -- -- 1 gallon gal -- -- -- -- 1 FIELD ACREAGE 1 Acre = 43,560 sq. ft. Acres = area in square feet 43,560 Rectangular or Square Fields Acres = Length x Width (in feet) 43,560 Triangular Fields Acres = Base x Height (in feet) 2 x 43,560 Parallelogram Fields (opposite sides parallel) Acres = Base x Height (in feet) 43,560 Trapezoidal Fields (two sides parallel) Acres = (length of A + length of B) x Height (in feet) 2 x 43,560 Odd Shaped Fields Divide into triangles and/or rectangles; find area of each separately; then add areas.

3 2 DRY MEASURE 1 pint = cubic inches 1 quart = cubic inches 1 peck = cubic inches 1 bushel = 2, cubic inches = ft3 1 standard barrel = 7,056 cubic inches STANDARD CROP WEIGHTS 1 bushel wheat = 60 pounds ( Government) 1 bushel corn = 56 pounds ( Government) 1 bushel barley = 48 pounds ( Government) 1 bushel oats = 32 pounds ( Government) 1 bushel potatoes = 60 pounds (most states in ) 1 bushel rice = 45 pounds 1 bushel grain sorghum = 56 pounds 1 bushel of soybeans = 60 pounds 1 bushel of dry beans = 60 pounds 1 bushel of cereal rye = 56 pounds 1 bushel of rapeseed = 50 pounds 1 bushel of sunflower seed = 24 pounds 1 bushel of spelt = 40 pounds 1 bushel of triticale = 56 pounds RATES OF APPLICATION 1 ounce/square foot =2, pounds/acre 1 ounce/square yard = pounds/acre 1 ounce/100 square feet = pounds/acre 1 pound/100 square feet = pounds/acre 1 pound/1,000 square feet = pounds/acre 1 pint/acre =1 fluid ounce/242 square yards 1 gallon/acre =1/3 ounce/1000 square feet 5 gallons/acre =1 pint/1,000 square feet 100 gallons/acre = gallons/1,000 sq.

4 Ft = 1 qt/100 sq. ft grams/square foot x 96 =pounds/acre kilograms/48 square feet =tons per acre pounds/square feet x =tons per acre 100 pounds/acre =3-1/2 oz/100 sq. ft = pounds/1,000 sq. ft 200 pounds/acre =7-1/2 oz/100 sq. ft 300 pounds/acre =11 oz/100 sq. ft 400 pounds/acre =14-3/4 oz/100 sq. ft 500 pounds/acre =1 lb 2-1/2 oz/100 sq. ft 600 pounds/acre =1 lb 6 oz/100 sq. ft 700 pounds/acre =1 lb 10 oz/100 sq. ft 800 pounds/acre =1 lb 13 oz/100 sq. ft 900 pounds/acre =2 lb 1 oz/100 sq. ft 1,000 pounds/acre =2 lb 5 oz/100 sq. ft 2,000 pounds/acre =4 Ib 10 oz/100 sq. ft CONVERSIONS 1 oz = ml = 2 tablespoons 1 tablespoon = ml 3 teaspoons = 1 tablespoon 4 tablespoons = 1/4 cup 5 1/3 tablespoons = 1/3 cup 8 tablespoons = 1/2 cup 10 2/3 tablespoons = 2/3 cup 16 tablespoons = 1 cup 1 ounce = grams 1 gram = ounces 1 cup = 8 fluid ounces 1 cup = 1/2 pint 2 cups = 1 pint 4 cups = 1 quart 4 quarts = 1 gallon 8 quarts = 1 peck 4 pecks = 1 bushel 1 quart = milliliters 1 liter = quarts 3 To convert Column 1 to Column 2, multiply by: Column 1 Column 2 To convert Column 2 to Column 1, multiply by.

5 Mile, mi kilometer, km yard, yd meter, m inch, in centimeter, cm mile2, mi2 kilometer2, km2 acre, A kilometer2, km2 acre, A hectare, ha ( km2) acre-inch, ac-in meter3, m3 cubic foot, ft3 hectoliter, hl bushel, bu hectoliter, hl quart (liquid), qt liter, L ton (English), T ton (metric)

6 , T pound, lb quintal, q pound, lb kilogram, kg ton (English)/acre ton (metric)/hectare lb/acre kg/ha hundredweight/acre quintal/hectare lb/inch2, psi kg/cm2 lb/in2, psi bar atmosphere, atm* bar atmosphere, atm* kg/cm2 lb/in2, psi atmosphere, atm* (F-32)

7 Fahrenheit, F Celsius, C + 32 foot-candle, ft-c lux * An "atmosphere" may be specified in metric or English units. USEFUL MEASUREMENTS Capacities Cylinder - diameter2 x depth x = cubic feet Rectangle - breadth x depth x length = cubic feet Cubic Feet x = gallons Quick Conversions 1 pint/acre = 1 fluid sq. yards 1 gal/acre = 1 pint/605 sq. yards 1 lb/acre = 1 sq. yards 1 cwt/acre = yard 1 mph = 88 3 mph = 1 chain/15 sec. A strip 3 ft. wide x 220 chains = 1 acre A strip 4 ft. wide x 165 chains = 1 acre A strip 5 ft. wide x 132 chains = 1 acre 4 Conversion Factors 1 gal = 231 1 ac-in. = 3630.

8 005 27,154 gal. lbs. H2O 226,192 lbs. H2O 335,312 lbs. soil 1 = 1728 1 ac-ft = 43,560 gal lbs. H20 325,848 gal. 2,722,000 lbs. H2O 1 = 46,656 4,000,000 lbs.

9 Soil 27 202 gal 1 = gpm 2480 lb soil ac-in ac-in/day ac-ft 3600 ft3/hr gal/sec 1 acre = 43,560 ft2 1 part per million (ppm) = ton/ac- ft. 4,840 yd2 227 160 rod2 1 ml /liter 2 lb/ac.

10 Per acre-furrow-slice ( ) hectares An acre-furrow-slice = one acre to a depth of 6 2/3 in. 1 gpm = ft3/sec. 2,000,000 lb of soil ac-in/hr. 1440 gal/24 hr. 1 (1 psi) = ft. H2O ac-in/24 hr. WEIGHTS AND MEASURES 1 acre = hectare 1 hectare = acres 1 acre = 43,560 square feet 1 acre = 4840 square yards 1 acre = 10 square chains 1 bushel (dry) = cubic feet 1 bushel (dry) = 2150 cubic inches 1 bushel (dry) = liters 1 bushel (dry) = 4 pecks 1 bushel (dry) = 32 quarts 1 cubic foot = bushel 1 cubic foot = quarts (dry) 1 cubic foot = quarts (liquid) 1 cubic foot = 1728 cubic inches 1 cubic foot = gallons 1 cubic inch = cubic centimeters 1 cubic inch = ounces (fluid)