MEASUREMENT UNITS

Standard conversion factors 
INCH = 25.4 mm (MILLIMETRE)
FOOT = 0.3048 METRE
YARD = 0.9144 METRE
MILE = 1.6093 KILOMETER
ACRE = 0.4047 HECTARE
POUND = 0.4536 KILOGRAM
DEGREE FARENHEIT X 5/9 – 32 = DEGREE CELSIUS
MILLIMETRE= 0.0394 INCH
METRE = 3.2808FOOT
METRE = 1.0936YARD

1) MILD STEEL (MS)
SHEET
WEIGHT (KGS) = LENGTH (MM) X WIDTH (MM) X 0. 00000785 X THICKNESS
example – The weight of MS Sheet of 1mm thickness and size 1250 MM X 2500 MM shall be
2500MM X 1250 MM X 0.00000785 X 1 = 24.53 KGS/ SHEET
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ROLLED STEEL CHANNELS

MS SQUARE
WEIGHT (KGS ) = WIDTH X WIDTH X 0.00000785 X LENGTH.
Example : A Square of size 25mm and length 1 metre then the weight shall be.
25x25X 0.00000785 X 1000mm = 4.90 kgs/metre

MS ROUND
WEIGHT (KGS ) = 3.14 X 0.00000785 X ((diameter / 2)X( diameter / 2)) X LENGTH.
Example : A Round of 20mm diameter and length 1 metre then the weight shall be.
3.14 X 0.00000785 X ((20/2) X ( 20/2)) X 1000 mm = 2.46 kgs / metre

SS ROUND
DIA (mm) X DIA (mm) X 0.00623 = WEIGHT PER METRE
SS / MS Pipe
OD ( mm) – W.Tthick(mm) X W.Thick (mm) X 0.0248 = Weight Per Metre
OD ( mm) – W.Tthick(mm) X W.Thick (mm) X 0.00756 = Weight Per Foot

SS / MS CIRCLE
DIA(mm) X DIA (mm) X THICK(mm) 0.0000063 = Kg Per Piece

SS sheet
Length (Mtr) X Width (Mtr) X Thick(mm) X 8 = Weight Per Piece
Length (ft) X Width (ft) X Thick(inch) X 3 /4 = Weight Per Piece

S.S HEXAGONAL BAR
DIA (mm) X DIA (mm) X 0.00680 = WT. PER Mtr
Dia (mm) X Dia (mm) X 0.002072 = Wt. Per foot.

BRASS SHEET
WEIGHT (KGS) = LENGTH (MM) X BREADTH (MM) X 0. 0000085 X THICKNESS
Example – The weight of brass sheet of thickness 1 mm, length 1220mm and breadth 355mm shall be
1220 X355X 0.0000085 X 1 = 3.68 Kgs/Sheet

COPPER SHEET
WEIGHT (KGS) = LENGTH (MM) X BREADTH (MM) X 0. 0000087 X THICKNESS
Example – The weight of coppper sheet of thickness 1 mm, length 1220mm and breadth 355mm shall be
1220X355 X 0.0000087 X 1 = 3.76 Kgs/Sheet

BRASS / COPPER PIPE
OD (mm) – THICK (mm) X THICK(mm) X 0.0260 = WEIGHT PER METRE

ALUMINUM SHEET
WEIGHT (KGS) = LENGTH (MM) X BREADTH (MM) X 0. 00000026 X THICKNESS
Example – The weight of Aluminum sheet of thickness 1 mm, length 2500mm and breadth 1250 mm shall be
2500x1250X 0.0000026 X 1 = 8.12 Kgs/Sheet

ALUMINIUM PIPE
OD (mm) – THICK(mm) X THICK(mm) X0.0083 = WEIGHT PER METRE

Er. Harpal Aujla.

More Useful Measurement Units

The E indicates an exponent, as in scientific notation, followed by a positive or negative number, representing the power of 10 by which the given conversion factor is to be multiplied before use.

Detailed Units – Convert Units

Following table shows how can we convert various most commonly used units from one unit system to another.

Units to convert	Value
Square foot to Square meter	1 ft² = 0.092903 m²
Foot per second squared  to Meter per second squared	1 ft² = 0. 3048 m²
Cubic foot to  Cubic meter	1 ft³ = 0.028316 m³
Pound per cubic inch to Kilogram per cubic meter	1 lb/in³ = 27679.9 047102 kg/m³
Gallon per minute = Liter per second	1 Gallon per minute = 0.0631 Liter per second
Pound per square inch = Kilopascal	1 Psi (Pound Per Square Inch)  = 6.894757  Kpa (Kilopascal)
Pound force = Newton	1 Pound force = 4.448222 Newton
Pound per Square Foot to Pascal	1 lbf/ft2 = 47.88025 Pascal
Acre foot per day = Cubic meter per second	1 Acre foot per day= 1428 (m3/s)
Acre to square meter	1 acre = 4046.856 m²
Cubic foot per second = Cubic meter per second	1 ft³/s = 0.028316847 m³/s

Measurement Units

Measurement units and standards are different in different countries but to maintain a standard, SI units are mostly used when dealing with projects involving different countries or even different states. Small projects can be done with the locally used unit system but when the project is big, one standard unit system is to be used.

Two most common system used in the United States are

United States Customary System (USCS)
System International (SI)

But the SI unit system is more widely used all over the world. Following is the table which shows how you can convert USCS measurements in SI measurements. ( Just multiply the USCS amount with the corresponding figure given in table below

Convert USCS into SI Units

USCS unit X Factor = SI unit	SI symbol
Square foot X 0.0929 = Square meter	M2
Cubic foot  X 0.2831 = Cubic meter	M3
Pound per square inch X 6.894 = Kilopascal	KPa
Pound force X 4.448 =  Newton	Nu
Foot pound torque X 1.356 = Newton meter	N-m
Kip foot X 1.355 = Kilonewton meter	LN-m
Gallon per minute X 0.06309 = Liter per second	L/s
Kip per square inch X 6.89 = Megapascal	MPa