• Topics: Environmental Horticulture | Nursery Pest Management | Weights and Measures | Miscellaneous Weed Management Topics | Unruh, Joseph Bryan | Brecke, Barry J

Metric System Conversion Factors¹

Area Equivalents

1 Acre (A)

= 43,560 square feet (ft²)

= 4,840 square yards (yd²)

= 0.405 hectares (ha)

= 160 square rods (rd²)

= 4,047 square meters (m²)

1 Acre-inch (ac-in)

= 102.8 cubic meters (m³)

= 27,154 gallons, US (gal)

= 3,630 cubic feet (ft³)

1 Are (a)

= 100 square meters (m²)

= 119.6 square yards (yd²)

= 0.025 acre (A)

1 Cubic Foot (ft³)

= 1,728 cubic inches (in³)

= 0.037 cubic yards (yds³)

= 0.02832 cubic meters (cm³)

= 28,320 cubic centimeters (cm³)

1 Cubic Yard (yd³)

= 27 cubic feet (ft³)

= 0.764 cubic meters (m³)

1 Hectare (ha)

= 10,000 square meters (m²)

= 100 are (a)

= 2.471 acres (A)

1 Square Foot (ft²)

= 144 square inches (in²)

= 929.03 square centimeters (cm²)

= 0.0929 square meters (m²)

1 Square Mile (mi²)

= 27,878,400 square feet (ft²)

= 3,097,600 square yards (yd²)

= 640 square acres (A²)

= 2,589,988.11 square meters (m²)

1 Square Rod (rd²)

= 39,204 square inches (in²)

= 272.25 square feet (ft²)

= 30.25 square yards (yds²)

= 25.3 square meters (m²)

1 Square Yard (yd²)

= 9 square feet (ft²)

= 0.836 square meters (m²)

Flow Equivalents

1 Gallon Per Minute (GPM, gal/min)

= 0.134 cubic feet/minute (CFMft³/min)

1 Cubic Foot Per Minute (CFM, ft³/min)

= 449 gallons per hour (GPH)

= 7.481 gallons per minute (GPM)

Length Equivalents

1 Centimeter (cm)

= 0.3937 inch (in)

= 0.01 meter (m)

= 0.03281 foot (ft)

1 Chain, Gunter's or Surveyor's (ch)

= 792 inches (in)

= 66 feet (ft)

= 22 yards (yd)

= 4 rods (rd)

= 0.0125 miles (mi)

= 2011.68 centimeters (cm)

= 20.116 meters (m)

1 Foot (ft)

= 12 inches (in)

= 30.48 centimeters (cm)

= 0.3048 meters (m)

1 Inch (in)

= 0.08333 foot (ft)

= 25.4 millimeters (mm)

= 2.54 centimeters (cm)

= 0.0254 meters (m)

1 Kilometer (km)

= 39,370 inches (in)

= 3,281 feet (ft)

= 0.621 U.S. statute mile (mi)

= 100,000 centimeters (cm)

= 1,000 meters (m)

1 Meter (m)

= 39.4 inches (in)

= 3.28 feet (ft)

= 1.094 yards (yd)

= 1000 millimeters (mm)

= 100 centimeters (cm)

1 Micrometer (micron, µm)

= 0.001 millimeters (mm)

= 1 x 10^-3 millimeters (mm)

1 Rod (rd)

= 198 inches (in)

= 16½ feet (ft)

= 5½ yards (yd)

= ¼ chain (ch)

= 502.92 centimeters (cm)

= 5.03 meters (m)

1 Statute Mile (mi)

= 5,280 feet (ft)

= 1,760 yards (yd)

= 1,609 meters (m)

= 1.61 kilometers (km)

1 Yard (yd)

= 36 inches (in)

= 3 feet (ft)

= 0.9144 meters (m)

Liquid Equivalents

1 Acre-inch of Water (ac in)

= 27,154 gallons (gal)

= 3,630 cubic feet (ft³)

1 Cubic Foot of Water (ft³)

= 7.48 gallons, US (gal)

= 62.4 pounds, US (lb, #)

= 28.3 liters (L)

1 Cup, measuring (c)

= 8 fluid ounces (fl. oz.)

= ½ pint (pt)

= 16 tablespoons (tbsp)

= 236.6 milliliters (ml)

1 Fluid Ounce, US (fl. oz.)

= 6 teaspoons (tsp)

= 2 tablespoons (tbsp)

= 29.57 milliliters (ml)

1 Gallon, US (gal)

= 4 quarts (qt)

= 8 liquid pints (pt)

= 16 cups (c)

= 256 tablespoons (tbsp)

= 128 fluid ounces, US (fl. oz.)

= 8.337 pounds, US (lb, #) of water

= 3.785 liters (L)

= 3,785 milliliters (ml)

= 0.1337 cubic foot (ft³)

= 231 cubic inches (in³)

= 0.8333 Imperial gallon

1 Liquid Pint, US (pt)

= 2 cups (c)

= 32 tablespoons (tbsp)

= 16 fluid ounces, US (fl. oz.)

= 473.2 milliliters (ml)

1 Liquid Quart, US (qt)

= 2 liquid pints, US (pt)

= 4 cups (c)

= 64 tablespoons (tbsp)

= 32 fluid ounces, US (fl. oz.)

= 57.75 cubic inches (in³)

= 0.9463 liters (L)

1 Liter (L)

= 1,000 milliliters (ml)

= 33.8 fluid ounces, US (fl. oz.)

= 2.1 liquid pints, US (pt)

= 1.057 liquid quarts, US (qt)

= 0.26 gallons, US (gal)

1 Milliliter (mL)

= 1 cubic centimeter (cm3)

= 0.34 fluid ounces, US (fl. oz.)

= 0.002 liquid pint, US (pt)

1 Tablespoon (tbsp)

= 3 teaspoons (tsp)

= 14.8 milliliters (ml)

= ½ fluid ounces, US (fl. oz.)

1 Teaspoon (tsp)

= 80 drops

= 0.1667 fluid ounces, US (fl.oz.)

= 4.93 milliliters (ml)

Mixture Proportions

1 pint/100 gallons = 1 teaspoon/1 gallon

1 quart/100 gallons = 2 tablespoons/1 gallon

Pressure Equivalents

1 pound per square inch (PSI) = 6.9 kilopascal (kPa)

Temperature Equivalents

Convert degrees Centigrade (°C) to degrees Fahrenheit (°F)

degrees Centigrade (°C) = (°F - 32) x 5/9

Convert degrees Fahrenheit (°F) to degrees Centigrade (°C)

degrees Fahrenheit (°F) = (°C x 9/5) + 32

Weight Equivalents

1 Ton, US, short or net

= 2,000 pounds, US (lb, #)

= 0.907 metric tons

= 907.2 kilograms (kg)

1 Metric Ton

= 1,000 kilograms (kg)

= 10⁶ (1 million) grams (g)

= 2,205 pounds, US (lb, #)

1 Pound, US (lb, #)

= 16 ounces, weight (oz.)

= 7,000 grains

about 1 liquid pint (pt)

= 453.6 grams (g)

= 0.4536 kilograms (kg)

1 Ounce, weight (oz.)

= 28.35 grams (g)

1 Kilogram (kg)

= 1,000 grams (g)

= 35.3 ounces, weight (oz.)

= 2.205 pounds, US (lb, #)

1 Gram (g)

= 1,000 milligrams (mg)

= 0.001 kilograms (kg)

= 0.035 ounces, weight (oz.)

= 0.0022 pounds, US (lb, #)

1 Milligram (mg)

= 0.001 grams (g)

= 10^-3 grams (thousandth)

1 Microgram (µg)

= 0.001 milligrams (mg)

= 10^-6 grams (millionth)

1 Nanogram (ng)

= 0.001 micrograms (µg)

= 10^-9 grams (billionth)

1 Picogram (pg)

= 10^-12 grams (trillionth)

1 Part Per Billion (ppb)

= 1 nanogram per gram (ng/g)

= 1 microgram per kilogram (µg)/kg)

= 1 microgram per liter (µg/L)

1 Part Per Million (ppm)

= 1 milligram per liter (mg/L)

= 1 milligram per kilogram (mg/kg)

= 1 microgram per gram (µg/g)

= 0.0001 percent (%)

= 0.013 fluid ounces per 100 gallon water

1 Part Per Trillion (ppt)

= 1 picogram per gram (pg/g)

1 Percent (%)

= 10,000 parts per million (ppm)

= 10 grams per liter (g/L)

= 1.33 ounces (oz.) by weight per 1 gallon water

= 8.34 pounds (lb, #) per 100 gallons water

MIXTURE RATIOS

1 milligram per gram (mg/g) = 1,000 parts per million (ppm)

1 fluid ounce, US per 1 gallon, US (1 fl. oz./1 gal) = 7,490 parts per million (ppm)

1 fluid ounce, US per 100 gallons, US (1 fl. oz./100 gal) = 75 parts per million (ppm)

SLOPES

10% = 6° = 10:1

18% = 10° = 6:1

25% = 14° = 4:1

33% = 18° = 3:1

50% = 26° = 2:1

100% = 45° = 1:1

Tables

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U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, Dean.

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