Engineering Calculators

 

Use the below links to navigate to these sections of this page:

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Temperature   |   Length   |   Weight   |   Pressure   |   Density   |   Thermal Conductivity   |   Coefficient of Linear Thermal Expansion

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Temperature Unit of Measure

Conversion Calculator

 

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Enter a number in either field, then click outside the text box.

°Fahrenheit  =   °Celsius

 

 

°Celsius  =    °Kelvin

 

 

For Reference:

 -40 °F = -40 °C

 1 ° C is equal to 1.8 °F

Absolute Zero = -459.4 °F = -273 °C = 0 °K

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Length Unit of Measure

Conversion Calculator

 

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Enter a number in either field, then click outside the text box.

inches  =    mm

 

 

feet  =    meters

 

 

For Reference:

1 meter = 39.37 inches = 3.281 feet

1 foot = 0.3058 meters = 30.58 cm = 305.8 mm

1 inch = 2.54 cm = 25.4 mm

.001 inch = 1 mil = 0.0254 mm = 25.4 microns (or µm)

.001 mm = 1 micron (or µm) = 10,000 Angstroms

1 mile = 5280 feet = 1609.4 meters

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Weight Unit of Measure

Conversion Calculator

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Enter a number in either field, then click outside the text box.

pounds  =    kilograms

 

 

For Reference:

1 pound = 0.4545 kilogram

1 kilogram = 2.20 pounds

1 gram = 0.0352 ounces = 0.0022 pounds

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Pressure (Force/Area) Unit of Measure

Conversion Calculator

 

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Enter a number in either field, then click outside the text box.

X 103 psi  =    MPa

 

 

X 103 psi  =    kg/cm2

 

 

For Reference:

1 psi = 1 pound per square inch = 6895 Pa (Pascal)

1 kpsi = 1 X 103 psi = 6895 KPa = 6.9 MPa

1 MPa = 1 X 103 KPa = 1 X 106 Pa

1 kpsi = 70.03 kg/cm2 (kilograms per square centimeter)

1 Pa = 1 Newton per square meter

.98 MPa = 10.0 kg/cm2   or   1 MPa = 10.20 kg/cm2

1 atm = 14.7 psi = 101,325 Pascals = 760 mm Hg = 760 torr

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Density Unit of Measure

Conversion Calculator

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Enter a number in either field, then click outside the text box.

lb/in3  =    g/cm3

 

 

For Reference:

1 lb/in3 = 27.67 g/cm3

Specific Gravity = ratio of density of material to density of water

(therefore, SpG of water = 1.00 by definition)

materials with density < 1.00 will float on water

materials with density > 1.00 will sink in water

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Thermal Conductivity Unit of Measure

Conversion Calculator

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Enter a number in either field, then click outside the text box.

 

BTU-in/ft2-hr-°F  =    X 10- 4 cal-cm/cm2-sec-°C

 

 

BTU-in/ft2-hr-°F  =    W/m-°C

 

 

For Reference:

1 BTU-in/ft2-hr-°F = 3.445 X 10- 4 cal-cm/cm2-sec-°C

1 cal-cm/cm2-sec-°C = 2902.92 BTU-in/ft2-hr-°F

1 W/m-°K = 6.933 BTU-in/ft2-hr-°F

1 BTU-in/ft2-hr-°F = 0.144 W/m-°K

(higher number = better conductor = poorer insulator)

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Coefficient of Linear Thermal Expansion (CLTE) Unit of Measure

Conversion Calculator

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Enter a number in either field, then click outside the text box.

 

in/in-°F  =    mm/mm-°C

 

 

For Reference:

Linear Dimensional Change = CLTE times Temperature Change (in degrees)

(higher CLTE = material expands and contracts more with temperature changes)

NOTE: CLTE's are VERY small numbers that are usually expressed

in negative powers of 10. For example, 1 X 10- 5 = 0.00001 = 10 ppm

1 X 10-6 = 0.000001 = 1 ppm (part per million)

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