Units of Measure and Conversions Factors
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UNITS OF MEASURE AND CONVERSIONS FACTORS Bert T. Swanson Abbreviations Abbreviation Definition Abbreviation Definition ppt Parts per Thousand ac Acre pt Pint(s) Bu Bushel(s) qt Quart(s) C or c Cup(s) S Siemen(s) cc Cubic Centimeter(s) rd Rod(s) cm Centimeter(s) Sec. Section(s) cm2 Square Centimeter(s) Tbsp Tablespoon(s) cm3 Cubic Centimeter(s) T Ton(s) C:N Carbon Nitrogen Ratio tsp Teaspoon(s) dm Decimeter(s) Twns Township dr Dram µl Microliter(s) dS/m DeciSiemens µgm Microgram(s) EC Electroconductivity (Salinity) µmho Micromho(s) ft Foot/Feet yd Yard(s) ft2 Square Foot/Feet yd2 Square Yard(s) ft3 Cubic Foot/Feet yd3 Cubic Yard(s) gal Gallon(s) gm Gram(s) gn Grain(s) Equivalent Measures ha Hectare(s) Area Measures: in Inch(es) 1 ac = 43,560 ft2 in2 Square Inch(es) 1 ac = 0.4 ha in3 Cubic Inch(es) 640 ac = 1 mi2 kg Kilogram(s) 1 cm2 = 0.16 in2 kl Kiloliter(s) 10,000 cm2 = 1 m2 km Kilometer(s) 1 ft2 = 0.111 yd2 l Liter(s) 1 ft2 = 144 in2 lb Pound 1 ft2 = 0.09 m2 lbs Pounds 9 ft2 = 1 yd2 m Meter(s) 43,560 ft2 = 1 ac m2 Square Meter(s) 1 ha = 2.47 ac m3 Cubic Meter(s) 1 in2 = 6.5 cm2 meg Milliequivalents 1 in2 = 0.0069 ft2 mg Milligrams(s) 144 in2 = 1 ft2 mi Mile(s) 1 m2 = 1.1 yd2 mi2 Square Mile(s) 1 m2 = 11.1 ft2 ml Milliliter(s) 1mi2 = 640 ac mm Millimeter(s) 1 km2 = 0.36 mi2 mmho Millimhos 1 mi2 = 2.8 km2 mS MilliSiemen(s) 1 mi2 = 1 Sec. nm Nanometer(s) 160 rd2 = 1 ac oz (F) Ounce(s) (Fluid) 36 Sec. = 1 twns oz (W)(D) Ounce(s) (Weight)(Dry) 1 yd2 = 9 ft2 pk Peck 1 yd2 = 0.8 m2 pph Parts per Hundred 1 yd2 = 1296 in2 ppm Parts per Million 30¼ yd2 = 1 rd2 49-1 1106 Linear Measures: Volume Measures continued: 1 cm = 0.4 in 1 gal = 16 C 1 cm = 0.033 ft 1 gal = 128 oz (F) 39.37 cm = 1 yd 1 gal = 3.785 l 10 cm = 1 dm 1 gal = 3,785 ml 100 cm = 1 m 1 gal = 231 in3 1 dm = 4 in 1 gal = 0.1337 ft3 10 dm = 1 m 1 gal water = 8.2 lbs 1 ft = 12 in 1 million gal/day = 1.57 ft3 per second 1 ft = 30.5 cm 1 million gal/day = 694.4 gal per minute 1 ft = 0.305 m 28 gm = 1 oz (W) 3 ft = 1 yd 1 l = 1.06 qt (F) 3.3 ft = 1 m 1 l = 0.9 qt (D) 16.5 ft = 1 rd 1 l = 0.26 gal 5,280 ft = 1 mi 1 l = 4.17 C 1 in = 2.5 cm 1 l = 2.1 pt 4 in = 1 dm 3.78 l = 1 gal 12 in = 1 ft 1 lb = 456 gm 36 in = 1 yd 1 m3 = 35 ft3 1 km = 0.625 mi 1 m3 = 1.3 yd3 1 km = 1,000 m 1 ml = 1 cc 1 m = 39.37 in 1 ml = 0.2 tsp 1 m = 100 cm 1 ml = 0.007 Tbsp 1 m = 1,000 mm 30 ml or cc = 1 oz (F) 1 m = 3.3 ft 1000 ml = 1 l 1 m = 1.1 yd 1 ml = 0.33 oz (F) 1 mi = 5,280 ft 1 oz (F) = 1/8 C 1 mi = 1.6 km 1 oz (F) = 2 Tbsp 1,000 m = 1 km 1 oz (F) = 6 tsp 10 mm = 1 cm 1 oz (F) = 30 cc or ml 1,000 mm = 1 m 1 oz (W) = 28 gm 1 yd = 36 in 8 oz (F) = 1 C 1 yd = 3 ft 16 oz (F) = 2 C 1 yd = 0.914 m 16 oz (F) = 1 pt 32 oz (F) = 1 qt Volume Measures: 32 oz (F) = 2 pt 3 BU = 1 wheelbarrow 32 oz (F) = 4 C 1 C = 8 oz 128 oz (F) = 1 gal 1 C = 0.5 pt 128 oz (F) = 4 qt 1 C = 16 Tbsp 128 oz (F) = 8 pt 1 C = 48 tsp 128 oz (F) = 16 C 1 C = 240 cc or ml 1 ppm = 0.001 gm per l 1 C = 0.25 l 1 ppm = 1 mg per l 2 C = 1 pt 1 ppm = 1 mg per kg 4 C = 1 qt 1 ppm = 1 mg per 0.9 qt 16 C = 1 gal 1 ppm = 0.0001 % 1 cc = 1 ml 1 ppm = 1 ul per l 946 cc or ml = 1 qt 1 ppm = 1 oz per 7,500 gal 1 ft3 = 1728 in3 1 ppm = 1 lb per 120,000 gal 1 ft3 = 7.48 gal 10 ppm = 0.01 gm per l 1 ft3 = 0.30 m3 100 ppm = 0.1 gm per l 27 ft3 = 1 yd3 1,000 ppm = 1 gm per l 1 ft3 water = 62.4 lbs 10,000 ppm = 10 gm per l 1 gal = 4 qt 10,000 ppm = 0.35 oz per gal 1 gal = 8 pt 1 pt = 16 oz 49-2 1106 Volume Measures continued: Weight Measures continued: 1 pt = 2 C 456 gm = 1 lb 1 pt = 32 Tbsp 27⅓ gn = 1dr 1 pt = 96 tsp 20 hundredweight= 1 T 1 pt = 473 cc or ml 1 kg = 2 1.5 lbs 1 pt = 0.473 l 1 lb = 16 oz 2 pt = 1 qt 1 lb = 456 gm 8 pt = 1 gal 1 lb = 0.456 kg 1 pt/100 gal = 1 tsp/gal 100 lbs = 1 hundredweight 1 qt = 64 Tbsp 2000 lbs = 1 T 1 qt = 32 oz (F) 1 metric T = 2,200 lbs 1 qt = 4 C 1 mg = 0.001 g, 1 qt = 2 pt 1 oz (W) = 28 gm 1 qt = 964 cc or ml 16 oz = l lb 1 qt = 0.964 l 1 ppm = 1 mg per l 4 qt = 1 gal 1 ppm = 1 mg per kg 1 qt/100 gal = 2 tsp/gal 1 ppm = 1 mg per 0.9 qt 1 Tbsp = 3 tsp 1 ppm = 0.0001 % 1 Tbsp = 0.5 oz 1 % = 10,000 ppm 1 Tbsp = 15 cc or ml 1 % = 10 gm per l 2 Tbsp = 6 tsp 1 % = 1.28 oz per gal 2 Tbsp = 1 oz (F) 0.1 % = 1,000 ppm = 1,000 mg/l 4 Tbsp = ¼ C 0.01% = 100 ppm = 100 mg per l 5 1/3 Tbsp = 1/3 C 0.001 % = 10 ppm = 10 mg per l 16 Tbsp = 8 oz (F) 0.0001 % = 1 ppm = 1 mg per l 16 Tbsp = 1 C 1 tsp = 1/3 Tbsp Unit of Measure Conversions 1 tsp = 1/6 oz To Convert: Into: Multiply By: 1 tsp = 0.17 oz Bu ft³ 0.8 1 tsp = 5.5 cc or ml Bu pk 4.0 3 tsp = 1 Tbsp Bu yd³ 0.454 6 tsp = 2 Tbsp cc or ml ft3 0.000035 6 tsp = 1 oz cc or ml in3 0.061 1 wheelbarrow = 3 Bu cc or ml m3 0.00001 1 yd3 = 22 Bu cc or ml yd3 0.0000013 1 yd3 = 202.5 gal cc or ml gal 0.000264 1 yd3 = 0.76 m3 cc or ml l 0.001 1 yd3 = 27 ft3 cc or ml oz (F) 0.033 1 % = 10,000 ppm cc or ml pt 0.00211 1 % = 10 gm per l cc or ml qt 0.00106 1 % = 1.28 oz per gal cm in 0.394 0.1 % = 1,000 ppm = 1,000 mg/l cm ft 0.033 0.01 % = 100 ppm = 100 mg per l cm m 0.01 0.001 % = 10 ppm = 10 mg per l cm mm 10.0 0.0001 % = 1 ppm = 1 mg per l cm yd 0.011 cm2 in2 0.155 Weight Measures: ft cm 30.48 16 dr = 1 oz ft in 12.0 1 gal = 4 qt ft m 0.305 1 gal = 8 pt ft yd 0.333 1 gal = 128 oz ft mi 0.000189 1 gm = 0.0357 oz (W)(D) ft km 0.000305 1 gm = 1000 mg ft3 cc or ml 0.000283 28 gm = 1 oz (W)(D) ft3 in3 1728.0 30 gm = 1 oz (F) 49-3 1106 To Convert: Into: Multiply By: To Convert: Into: Multiply By: ft3 m3 0.0283 lbs of water in3 27.68 ft3 yd3 0.037 lbs of water gal 0.1198 ft3 gal 7.481 m ft 3.281 ft3 l 28.32 m in 39.37 ft3 pt 59.84 m yd 1.094 ft3 qt 29.92 m mi 0.00062 ft3 Bu 1.25 m cm 100.0 gal cc or ml 3,785.0 m mm 1000.0 gal ft3 0.134 m km 0.001 gal in3 231.0 m2 yd2 1.196 gal m3 0.00379 m3 cc or ml 10,000.0 gal yd3 0.00495 m3 ft3 35.31 gal l 3.785 m3 in3 61.02 gal pt 8.0 m3 yd3 1.31 gal qt 4.0 m3 gal 264.2 gal of water lbs of water 8.35 m3 l 1,000.0 gm oz 0.0353 m3 pt 2,113.0 gm lbs 0.00220 m3 qt 1,057.0 gm kg 0.001 mg gm 1,000.0 in cm 2.540 mi ft 5,280.0 in ft 0.083 mi m 1,609.3 in yd 0.278 mi km 1.609 in m 0.0254 mi yd 1,760.0 in2 cm2 6.452 ml or cc oz (F) 0.333 in3 cc or ml 16.39 ml or cc l 0.001 in3 ft3 0.000579 mm in 0.0394 in3 m3 0.000164 oz (W) lbs 0.0625 in3 yd3 0.0000214 oz (F) Tbsp 2.0 in3 gal 0.004433 oz (F) tsp 6.0 in3 l 0.0164 oz (W) Tbsp 3.0 in3 pt 0.0346 oz (W) tsp 9.0 in3 qt 0.0173 oz (W) gm 28.3 kg gm 1,000.0 oz (F) in3 1.805 kg oz 45.27 oz (F) l 0.03 kg lbs 2.205 oz (F) cc or ml 30.0 km ft 3,281.0 oz kg 0.028 km m 1,000.0 pk Bu 0.25 km mi 0.6214 pt l 0.473 km yd 1,094.0 pt qt 0.5 l C 4.226 pt gal 0.125 l cc or ml 1,000.0 pt cc or ml 473.18 l ft3 0.0353 qt pt 2.0 l in3 61.02 qt l 0.946 l m3 0.01 qt gal 0.25 l ml 1000.0 qt (D) in3 67.20 l yd3 0.00131 qt (F) in3 47.74 l oz (F) 33.8 qt cc or ml 946.36 l gal 0.264 T lbs 2000.00 l pt 2.113 Tbsp (D) oz 0.33 l qt 1.057 Tbsp (F) oz 0.55 lbs oz 16.0 Tbsp tsp 3.0 lbs gm 453.6 tsp (D) oz 0.111 lbs kg 0.454 tsp (F) oz 0.166 lbs of water ft3 0.016 tsp Tbsp 0.333 49-4 1106 To Convert: Into: Multiply By: yd in 36.0 yd ft 3.0 Table 2.