International Common Conversion Table
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Length
1 inch = 2.540 centimeters
1 inch = 25.4 millimeter
1 meter = 100 centimeters
1 meter = 1000 millimeters
1 centimeter = 10 millimeters
1 millimeter = 0.03937 inches
1 meter = 10 decimeters
1 decimeters = 10 centimeters
1 foot = 30.4878 centimeters
1 centimeters = 0.3937 inches
1 yard = 0.9144028 meters
1 meter = 3.281 feet
1 mile = 1.6093419 kilometer
1 kilometer = 0.621372 miles
Area
1 sq. meter = 100 sq. decimeters
1 sq.decimeter = 100 sq. centimeters
1 sq.centimeter = 100 sq.millimeters
1 sq. meter = 1550.00310001 sq. inches
1 sq. inch = 6.4516 sq. centimeters
1 sq. centimeter = 0.1550 sq. inches
1 sq. foot = 0.0929 sq. meters
1 sq. meter = 1.195986 sq. yards
1 sq. yard = 0.83613 sq. meters
1 sq. kilometer = 0.386101 sq. miles
1 sq. mile = 2.589999 sq. kilometers
1 hectare = 2.471044 acres
1 acre = 0.404687 hectares
Mass (Weight)
1 grain = 0.05 scruples = 0.016667 drams = 0.00208 ounces
1 ounce = 28.3495 grams
1 gram = 0.03527396 ounces
1 pound = 16 oz = 0.4535924 kilograms
1 kilogram = 2.2046223 pounds
1 short ton = 0.892857 metric ton
1 metric ton = 1.1200 short tons
1 long ton = 1.01605 metric tons
1 kilometer = 0.621372 miles
Volume
1 liter（L）=1000 milliliters（ML）
1 liter（L）=10 deciliters（DL）
1 teaspoon = 5 milliliters
1 liter（L）=0.001 cubic meters (m³)
1 milliliter = 0.0338147 fluid ounces
1 tablespoon = 15 milliliters
1 liter = 2.11342 pints = 1000 cubic centimeters
1 fluid ounce = 30 milliliters
1 liter = 1.05671 quarts = 0.264178 gallons
1 gallon = 3.785332 liters = 231 cubic inches
1 cup = 0.23658 liters
1 pint = 0.473167 liters
1 cubic meter = 35.3144 cubic feet = 1.30794 cubic yards
1 cubic foot = 0.0283170 cubic meters
1 cubic yard = 0.764559 cubic meters
Temperature
Fahrenheit Subtract 32, then multiply by 5/9ths Celsius
Celsius Multiply by 9/5ths, then add 32 Fahrenheit
Formula for calculating the weight of steel pipes per meter
Formula for calculating the weight of square tubes:
4 × wall thickness × (Side length wall thickness) × 7.85/1000 kg/m
For example, 50 × 50 × 4mm square tube weight is: 4 × 4 × (50-4) × 7.85/1000 kg/m=5.77 kg/m
Formula for calculating the weight of rectangular tubes:
2 × (Side length 1+Side length 2- Wall thickness) × wall thickness × length × Density kg/m/1000
For example, 60 × 40 × 4mm rectangular tube weight is:
2 × (60+40-4) × 4 × 1 × 7.85 kg/m/1000=6.0288 kg/m
Usually, this calculation company calculates a weight that is greater than the actual weight.
There is also a calculation formula for square and rectangular steel pipes:
There is also a formula for calculating the weight per meter for square and rectangular steel pipes:
（2 × (Side length 1+Side length 2)/3.14- Wall thickness) × Wall thickness × 0.0246615 × Length/1000
Formula for calculating the weight of circular pipes:
(Outer diameter - wall thickness) × Wall thickness × 0.0246615 × Length/1000
For example, 2032 × 40mm round tube weight is:
(2032-40)×40×0.0246615×1/1000=1.96502832 Ton/M
Density
Grey cast iron (≤ HT200) 7.2 （g/cm ³）
Grey cast iron (≥ HT250) 7.35 （g/cm ³）
White cast iron 7.4~7.7 （g/cm ³）
Malleable cast iron 7.2-7.4 （g/cm ³）
Industrial pure iron 7.87 （g/cm ³）
Cast steel 7.8 （g/cm ³）
Steel 7.85 （g/cm ³）
Low carbon steel (containing 0.1% carbon) 7.85 （g/cm ³）
Medium carbon steel (containing 0.4% carbon) 7.82 （g/cm ³）
High carbon steel (containing 1% carbon) 7.81 （g/cm ³）
High speed steel (containing 9% tungsten) 8.3 （g/cm ³）
High speed steel (containing 18% tungsten) 8.7 （g/cm ³）
Stainless steel (1Cr18Ni9) 7.93 （g/cm ³）
Stainless steel (1Cr13) 7.75 （g/cm ³）
Stainless steel (1Cr17) 7.70 （g/cm ³）
Pure copper (red copper) 8.93 （g/cm ³）
Pure nickel, NSi0.19 8.902 （g/cm ³）
Industrial pure aluminum 2.702 （g/cm ³）
Zinc plate, zinc anode plate 7.133 （g/cm ³）
Zinc copper alloy 7.2 （g/cm ³）
Lead plate 11.3437 （g/cm ³）
Lead foil 11.37 （g/cm ³）
Tin 7.168 （g/cm ³）
Osmium 22.59 （g/cm ³）
Iridium 22.56 （g/cm ³）
Platinum 21.45 （g/cm ³）
Jin 19.32 （g/cm ³）
Tungsten 19.35 （g/cm ³）
Tantalum 16.6 （g/cm ³）
Mercury 13.546 （g/cm ³）
Thorium 11.72 （g/cm ³）
Silver 10.5020 （g/cm ³）
Molybdenum 10.22 （g/cm ³）
Bismuth 9.808 （g/cm ³）
Cobalt 8.832 （g/cm ³）
Cadmium 8.642 （g/cm ³）
Niobium 8.57 （g/cm ³）
Manganese 7.47 （g/cm ³）
Chromium 7.19 （g/cm ³）
Cerium 6.6893 （g/cm ³）
Antimony 6.697 （g/cm ³）
Zirconium 4.574 （g/cm ³）
Tellurium 6.237 （g/cm ³）
Vanadium 5.87 （g/cm ³）
Titanium 4.507 （g/cm ³）
Barium 3.512 （g/cm ³）
Beryllium 1.8520 （g/cm ³）
Magnesium 1.738 （g/cm ³）
Calcium 1.55 （g/cm ³）
Sodium 0.9674 （g/cm ³）
Potassium 0.862 （g/cm ³）
Arsenic 5.727 （g/cm ³）
Selenium 4.809 （g/cm ³）
Boron 2.3420 （g/cm ³）
Silicon 2.33 （g/cm ³）
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