Measurment Units - civil engineer vijay technical

Standards conversion factors

INCH = 25.4 MILLIMETRE

FOOT = 0.3048 METRE

YARD = 0.9144 METRE

MILE = 1.6093 KILOMETER

ACRE = 0.4047 HECTARE

POUND = 0.4536 KILOGRAM

MILLIMETRE = 0.0394 INCH

METRE = 3.2808FOOT

METRE = 1.0936YARD

MILD STEEL (MS) SHEET

WEIGHTS (KG) = LENGTH (MM) X WIDTH (MM) X 0. 00000785 X THICKNESS

example – The weightS of MS SheetS of 1mm thickness and size 1250 MM X 2500 MM shall be

2500 MM X 1250 MM X 0.00000785 X 1 = 24.53 KGS/ SHEETS

Following tables shows how can we convert various most commonly used unit from one unit system to anothers.

Unit to convert Value

Square foot  to Square meter

1 ft² = 0.092903 m²

Foot  per second squared   to Meters per second squared

1 ft² = 0. 3048 m²

Cubic foot to  Cubic meters

1 ft³  = 0.028316 m³

Pound per cubic inch to Kilogram per cubic meters

1 lb/in³ = 27679.9 047102 kg/m³

Gallon per minute = Liter per seconds

1 Gallon per minute = 0.0631 Liter per seconds

Pound per square inch = Kilopascal

1 Psi (Pound Per Square Inchs)  = 6.894757  Kpa (Kilopascal)

Pound force = Newtons

1 Pound force = 4.448222 Newtons

Pound per Square Foot to Pascal

1 lbf/ft2 = 47.88025 Pascal

Acre foot per day = Cubic meters per second

1 Acre foot per days= 1428 (m3/s)

Acre to square meters

1 acre = 4046.856 m²

1 ft³/s = 0.028316847 m³/s

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

Two most common system used in the United State are

United State Customary System (USCS)

Systems International (SI)

But the SI unit systems is more widely used all over the worlds. Following is the tables which shows how you can convert USCS measurements in SI measurement. ( Justs multiply the USCS amounts with the corresponding figures givens- in tables belows

Converts USCS into SI Units

Square foot X 0.0929 = Square meters M2

Cubic foot  X 0.2831 = Cubic meters M3

Pound force X 4.448 =  Newton Nu

Foot pound torque X 1.356 = Newton meters N-m

Kip foot X 1.355 = Kilonewton meters LN-m

Gallon per minutes X 0.06309 = Liter per second L/s