eFunda: The Ultimate Online Reference for Engineers

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Materials Periodic Table, Steels Aluminum, Polymers Piezo, Corrosion ...more		Unit Conversion Length, Mass, Pressure Time, Base-N, Fractions Hardness, Gage ...more
Design Center Plastic Design, Gages Springs, O-Rings, Sensors Screws, I-Beams ...more		Formulas Beam, Plate, Composite Vibration, Heat Transfer Fluid Mechanics ...more
Processes Casting, Stamping, Molding Annealing, Machining Rapid Prototyping ...more		Mathematics Areas, Trigonometry Taylor Series, Least Squares Laplace Transform ...more

Engineering Calculators

Design Aids
Spring, Wire/Sheet Gages
Fraction, Hardness Conversion
O-Ring: Sizing/Material

Solid Mechanics
Beam, Plate, Vibration
Stress/Strain Transform, Failure
Principal Stress/Strain, Elastic Const
Composite Material, Stiffness, ABD

Fluid and Thermal
Reynolds Number, Venturi Flowmeter
Pipe Friction, Radiation
Laminar Flow over Plate

Mathematics
Base-N, Gamma Function
Gauss Quads:Legendre/Laguerre
Loan, Lease, APR
Symbolic Calculators

Calculus: Integral, Derivative, Limit
Matrix: Inverse, Eigenvalue, Linear System
Plot: 2D, 3D, Parametric
Numerical: Root, Curve Fit