Page 545 - IS-Rayfast Catalogue - Issue 9, 2017

Appendix
Formulas and Constants

Conversion Factors
The formulas below convert imperial to metric and visa-versa:

Volume Power
Cubic inches x 16.39 = Cubic centimetres Foot pounds force per sec x 1.3558 = Watts
Cubic centimetres x 0.06102 = Cubic inches Horsepower x 745.700 = Watts
Cubic feet x 0.02832 = Cubic metres Foot pounds force per sec x 0.0014 = Kilowatts
Cubic metres x 35.31 = Cubic feet Horsepower x 1.0139 = Metric horsepower
Cubic yard x 0.7645549 = Cubic metre
Cubic metre x 1.307951 = Cubic yard
Energy
Quart (US) x 2 = Pint (US) Btus x 1,055.0559 = Joules
Pint (US) x 0.8327 = Pint (UK) Joules x 0.000948 = BTUs
Btus x 778.169 = Foot pounds
Mass Foot pounds x 0.00128 = BTUs
Ounces x 28.35 = Grams
Grams x 0.03527 = Ounces Pressure
Pounds (lb) x 0.4536 = Kilograms PSI x 0.0689 = Bar
Kilograms x 2.205 = Pounds (lb) Bar x 14.5047 = PSI
Kilograms/km x 0.6214 = Pounds/kft Pascal x 0.000145 = PSI
Pounds/kft x 1.4881 = Kilograms/km PSI x 6,894.76 = Pascal
Stones x 6.3503 = Kilograms Bar x 1.0197 = Kilogram / Centimetre 2
2
Tons x 1016.0469 = Kilograms Kilogram / Centimetre x 0.9801 =Bar
Tons x 1.016 = Metric tones
Area
Length Square inches x 645.16 = Square millimetres
Milli-inches x 25.40 = micrometres Square inches x 6.4516 = Square centimetres
Inches x 25.40 = Millimetres Square centimetres x 0.1550 = Square inches
Millimetres x 0.03937 = Inches Square feet x 929.0304 = Square centimetres
Feet x 0.3048 = Metres Square feet x 0.0929 = Square metres
Miles x 1.609 = Kilometres Square metres x 10.76 = Square feet
Kilometres x 0.6214 = Miles Square miles x 2.59 = Square kilometres
Ohms/km x 0.3048 = Ohms/kft Square kilometres x 0.3861 = Square miles
Chains x 20.1168 = Metres Circular mils x 0.7854 = Square mil

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