ABSTRACT
Millimetre mm 1 in = 25.4mm 1mm = 0.0394 in Centimetre cm 1 in = 2.54 cm 1cm = 0.3937 in Metre m 1 ft = 0.3048m 1m = 3.2808 ft
1 yd = 0.9144m = 1.0936 yd Kilometre km 1mile = 1.6093 km 1km = 0.6214mile
Note: 1 cm = 10mm 1 ft = 12 in 1m = 1 000mm 1 yd = 3 ft 1 km = 1 000m 1mile = 1 760 yd
Area Unit Conversion factors
Square Millimetre mm2 1 in2 = 645.2mm2 1mm2 = 0.0016 in2
Square Centimetre cm2 1 in2 = 6.4516 cm2 1 cm2 = 1.1550 in2
Square Metre m2 1 ft2 = 0.0929m2 1m2 = 10.764 ft2
1 yd2 = 0.8361m2 1m2 = 1.1960 yd2
Square Kilometre km2 1mile2 = 2.590km2 1 km2 = 0.3861mile2
Note: 1 cm2 = 100mm2 1 ft2 = 144 in2
1m2 = 10 000 cm2 1 yd2 = 9 ft2
1 km2 = 100 hectares 1 acre = 4 840 yd2
1mile2 = 640 acres
Volume Unit Conversion factors
Cubic Centimetre cm3 1 cm3 = 0.0610 in3 1 in3 = 16.387 cm3
Cubic Decimetre dm3 1 dm3 = 0.0353 ft3 1 ft3 = 28.329 dm3
Cubic Metre m3 1m3 = 35.3147 ft3 1 ft3 = 0.0283m3
1m3 = 1.3080 yd3 1 yd3 = 0.7646m3
Litre l 1 l = 1.76 pint 1 pint = 0.5683 l = 2.113 US pt = 0.4733 US l
Note: 1 dm3 = 1 000 cm3 1 ft3 = 1 728 in3 1 pint = 20 fl oz 1m3 = 1 000 dm3 1 yd3 = 27 ft3 1 gal = 8 pints 1 l = 1 dm3
Mass Unit Conversion factors
Milligram mg 1mg = 0.0154grain 1 grain = 64.935mg Gram g 1g = 0.0353 oz 1 oz = 28.35 g Kilogram kg 1 kg = 2.2046 lb 1 lb = 0.4536 kg Tonne t 1 t = 0.9842 ton 1 ton = 1.016 t
= = 16 = 14
Newton N 1 lbf = 4.448 N 1kgf = 9.807 N Kilonewton kN 1 lbf = 0.004448 kN 1 ton f = 9.964 kN Meganewton MN 100 tonf = 0.9964 MN
Pressure and stress Unit Conversion factors
Kilonewton per square metre kN/m2 1 lbf/in2 = 6.895 kN/m2
1 bar = 100 kN/m2
Meganewton per square metre MN/m2 1 tonf/ft2 = 107.3 kN/m2 = 0.1073 MN/m2
1 kgf/cm2 = 98.07 kN/m2
1 lbf/ft2 = 0.04788 kN/m2
Coefficient of consolidation (Cv) or swelling
Unit Conversion factors
Square metre per year m2/year 1 cm2/s = 3 154m2/year 1 ft2/year = 0.0929m2/year
Coefficient of permeability Unit Conversion factors
Metre per second m/s 1 cm/s = 0.01m/s Metre per year m/year 1 ft/year = 0.3048m/year
= 0.9651 × (10)8m/s
Temperature Unit Conversion factors
Degree Celsius °C °C = 5/9 × (°F − 32) °F = (9 × °C)/ 5 + 32
km/h m/min mph fpm
1 16.7 0.6 54.7 2 33.3 1.2 109.4 3 50.0 1.9 164.0 4 66.7 2.5 218.7 5 83.3 3.1 273.4
6 100.0 3.7 328.1 7 116.7 4.3 382.8 8 133.3 5.0 437.4 9 150.0 5.6 492.1
10 166.7 6.2 546.8
11 183.3 6.8 601.5 12 200.0 7.5 656.2 13 216.7 8.1 710.8 14 233.3 8.7 765.5 15 250.0 9.3 820.2
16 266.7 9.9 874.9 17 283.3 10.6 929.6 18 300.0 11.2 984.3 19 316.7 11.8 1038.9 20 333.3 12.4 1093.6
21 350.0 13.0 1148.3 22 366.7 13.7 1203.0 23 383.3 14.3 1257.7 24 400.0 14.9 1312.3 25 416.7 15.5 1367.0
26 433.3 16.2 1421.7 27 450.0 16.8 1476.4 28 466.7 17.4 1531.1 29 483.3 18.0 1585.7 30 500.0 18.6 1640.4
31 516.7 19.3 1695.1 32 533.3 19.9 1749.8 33 550.0 20.5 1804.5 34 566.7 21.1 1859.1 35 583.3 21.7 1913.8
36 600.0 22.4 1968.5 37 616.7 23.0 2023.2 38 633.3 23.6 2077.9 39 650.0 24.2 2132.5 40 666.7 24.9 2187.2
41 683.3 25.5 2241.9 42 700.0 26.1 2296.6 43 716.7 26.7 2351.3 44 733.3 27.3 2405.9 45 750.0 28.0 2460.6
46 766.7 28.6 2515.3 47 783.3 29.2 2570.0 48 800.0 29.8 2624.7 49 816.7 30.4 2679.4 50 833.3 31.1 2734.0
