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Available  Calculations  (all free!) - (www.mycalculations.com)
Engineering	Petroleum Engineering
	Chemical Engineering
	Mechanical Engineering
	Civil Engineering
Science	Biotechnology
	Nanotechnology
	Physics
	Chemistry
Financial	Basic cashflow analysis
	Project selection/Capital allocation by Ranking method
Measurement Units	Units Conversion Calculators
	Units Conversion factors
Drilling	Surge & Swab pressures
	Bit Hydraulics Optimization
	Cuttings Slip Velocity
	Equivalent Circulation Density Of Mud
	Basic solids analysis
	Drilling rate d-Exponent
	Directional survey
	Well Schematic I - Single vertical completion
	Well Schematic II - Dual vertical completion
	Well Schematic III - Horizontal single completion
	Casing Data Browser
Reservoir I	Material Balance Equation I: SolutionGas-GasCap Drive
	Material Balance Equation II: SolutionGas with GasCap Withdrawal/Injection
	Pressure Buildup Analysis - Horner Plot (Oilwell)
	Inflow Performance Relationships For solution-gas drive Vertical wells
	Inflow Performance Relationships For solution-gas drive Slanted wells
	Inflow Performance Relationships For solution-gas drive Horizontal wells
	Horizontal well performance (oil)
	Water coning in a vertical well
	Combined gas & water coning in a vertical well
	Water breakthrough time in a vertical well
Reservoir II - Gas	Original Gas In Place: Volumetric reservoir - p/z method
	Original Gas In Place: Abnormally Pressured gas reservoir
	Coalbed Methane: Original Gas In Place by P/Z* method
	Coalbed Methane: Reservoir performance prediction
	Gaswell deliverability - Backpressure AOF test
	Horizontal well performance (gas)
	Gas Properties - I: Z, ì, Bg and Sg for a given Composition
	Gas Properties - II: Z, ì, Bg for a given Specific gravity
	Real gas pseudo-pressure
	Gas coning in a vertical well
Production	Decline Curve Analysis
	Flow through chokes (1-phase)
	Flow through chokes (2-phase)
	Gaswell flow in Vertical Tubing
	Gas flow in Horizontal Pipeline
	Gas flow in Inclined Pipeline
	API Gravity Correction to 60°F
	Gas well load-up: Critical Rate
	Tubing Data Browser
	Skin Factors In Perforated Vertical Wells
	Skin Factors In Perforated Horizontal Wells
	Productivity Ratio Of Perforated Horizontal Wells
Geosciences	Contouring
	Conventional well log analysis I
	Conventional well log analysis II
Economics	Basic cashflow analysis
	Comprehensive cashflow analysis (oilfield)
	Comprehensive cashflow analysis (gasfield)
	"Optimum" number of Oilfield development wells
	Project selection/Capital allocation by Ranking method
Miscellaneous	Units Conversion Calculators
	Units Conversion factors
	World Oil & Gas Production & Reserves - Country by country Data
	Mechanical Engineering Calculators
	Civil Engineering Calculators
	Chemical Engineering Calculators
Physical Properties	Physical properties of Water
	Liquid-phase Diffusion coefficients
	Gas Z-factor, Viscosity & Specific Gravity for a given Composition
	Gas Z-factor & Viscosity for a given Specific gravity
	API gravity Correction To 60°F
Fluid Flow	Reynolds Number and Friction Factors
	Vapor-Liquid 2-Phase Vertical downflow
	Flow Through Packed Bed
	Liquid Pipe flow: Pressure Drop calculation
	Liquid Pipe flow: Pipe Length calculation
	Liquid Pipe flow: Flow Rate calculation
	Liquid Pipe flow: Pipe Diameter calculation
	Gas flow in Horizontal Pipeline
	Gas flow in Inclined Pipeline
Heat Transfer	Shell & Tube Heat Exchanger: Corrected LMTD
	Air-cooled Heat Exchanger Design
Equipment Sizing	Sizing Of Liquid-Vapor Separators
	Partial Volumes Of Tanks
	Orifice Sizing for fluid flow
	Gas Compressor performance
Mass Transfer	Multicomponent Equilibrium Flash Calculations
	Packed-Tower Sizing
Economics	Basic cashflow analysis
	Project selection/Capital allocation by Ranking method
Measurement Units	Units Conversion Calculators
	Units Conversion factors
Other Calculators	Petroleum Engineering Calculators
	Chemistry Calculators
	Mechanical Engineering Calculators
	Civil Engineering Calculators
Machine Mechanics	Rolling Wheel
	Motion of Crank-Slider Mechanism
	Buckling of Helical Spring
	Bolt & Nut Bolted Joint: Stiffnesses of components
	Cap Screw Bolted Joint: Stiffnesses of components
	Bolted Joint: Static and Dynamic loading
	Butt Weld under axial and transverse loading
	Fillet Weld under Torsional loading
	Fillet Weld under Bending loading
Material Stresses	Pressure loading: Thin-walled vessels (Sphere & Cylinder)
	Pressure loading: Thick-walled Cylinder
	Stresses due to Interference (press or shrink) fit
	Contact stresses: Sphere on a sphere
	Contact stresses: Sphere on a Flat surface
	Contact stresses: Cylinder on a cylinder
	Contact stresses: Cylinder on a Flat surface
	Rotational loading: Thin disk
	2D Stresses & Mohr's Circle
	3D Stresses & Mohr's Circles
	Static Failure analysis: Ductile material
	Static Failure analysis: Brittle material
	Buckling of Column with Rectangular cross-section
	Buckling of Column with Circular cross-section
	Fatigue & dynamic Failure analysis
	Stress Concentration factors: Two U-Notches in a Rectangular member
	Stress Concentration factors: Circular Hole in a Rectangular member
	Stress Concentration factors: U-Notch in a Circular shaft
	Stress Concentration factors: Square Shoulder with Fillet in a Circular shaft
	Stress Concentration factors: Radial Hole in hollow or solid Circular shaft
Fluid Flow	Reynolds Number and Friction Factors
	Liquid Pipe flow: Pressure Drop calculation
	Liquid Pipe flow: Pipe Length calculation
	Liquid Pipe flow: Flow Rate calculation
	Liquid Pipe flow: Pipe Diameter calculation
	Gas Z-factor, Viscosity & Specific Gravity for a given Composition
	Gas Z-factor & Viscosity for a given Specific gravity
	Gas flow in Horizontal Pipeline
	Gas flow in Inclined Pipeline
	Forces on a pipe bend
Heat Transfer	Shell & Tube Heat Exchanger: Corrected LMTD
Vibrations	Critical Speed of a Multi-Rotor System
Metalworking	Hardness-To-Hardness Conversion
	Sheet metal Bend Deduction & Allowance
Economics	Basic cashflow analysis
	Project selection/Capital allocation by Ranking method
Beam Flexure	Simply-supported beam with concentrated Force at intermediate point
	Simply-supported beam with concentrated Couple at intermediate point
	Simply-supported beam with Uniform Distributed load
	Simply-supported beam with Triangular Distributed load
	Simply-supported beam with Twin concentrated Forces
	Simply-supported beam with Single overhang and concentrated Force at free end
	Simply-supported beam with Single overhang and uniform Distributed load
	Simply-supported beam with Double overhang and concentrated Forces both ends
	Simply-supported beam with Double overhang and Distributed load
	Simply-supported beam with Multiple and Varied loading: I
	Simply-supported beam with Multiple and Varied loading: II
	Cantilevered beam with concentrated Force at intermediate point
	Cantilevered beam with concentrated Couple at intermediate point
	Cantilevered beam with Uniform Distributed load
	Cantilevered beam with Triangular Distributed load
Miscellaneous	Units Conversion Calculators
	Units Conversion factors
	Petroleum Engineering Calculators
	Civil Engineering Calculators
	Chemical Engineering Calculators
Structure I	Simply-supported beam with concentrated Force at intermediate point
	Simply-supported beam with concentrated Couple at intermediate point
	Simply-supported beam with Uniform Distributed load
	Simply-supported beam with Triangular Distributed load
	Simply-supported beam with Twin concentrated Forces
	Simply-supported beam with Single overhang and concentrated Force at free end
	Simply-supported beam with Single overhang and uniform Distributed load
	Simply-supported beam with Double overhang and concentrated Forces both ends
	Simply-supported beam with Double overhang and Distributed load
	Simply-supported beam with Multiple and Varied loading: I
	Simply-supported beam with Multiple and Varied loading: II
	Cantilevered beam with concentrated Force at intermediate point
	Cantilevered beam with concentrated Couple at intermediate point
	Cantilevered beam with Uniform Distributed load
	Cantilevered beam with Triangular Distributed load
Structure II	Fixed Frame With Concentrated Force At Any Point On Girder
	Hinged Frame With Concentrated Force At Any Point On Girder
	Fixed Frame With Distributed Force On Girder
	Hinged Frame With Distributed Force On Girder
	Fixed Parabolic Arch With Concentrated Force
	Two-Hinged Parabolic Arch With Concentrated Force
	Fixed Parabolic Arch With Distributed Force
	Two-Hinged Parabolic Arch With Distributed Force
	Triangular Truss Under Concentrated Forces
	Bridge Truss Under Concentrated Forces
	Cantilever Truss Under Concentrated Forces
	2D Stresses & Mohr's Circle
	3D Stresses & Mohr's Circles
	Static Failure analysis: Ductile material
	Static Failure analysis: Brittle material
	Buckling of Column with Rectangular cross-section
	Buckling of Column with Circular cross-section
	Fatigue & dynamic Failure analysis
Structure III	Concrete Mix Job
Geotechnical	Physical Properties of Soils
	Stresses In Soils Due To Concentrated Surface Load
	Soil Consolidation And Settlement
Transportation
Hydraulics	Reynolds Number and Friction Factors
	Liquid Pipe flow: Pressure Drop calculation
	Liquid Pipe flow: Pipe Length calculation
	Liquid Pipe flow: Flow Rate calculation
	Liquid Pipe flow: Pipe Diameter calculation
	Forces on a pipe bend
Hydrology	Groundwater flow to a well
	Trapezoidal Open-Channel Flow
Economics	Basic cashflow analysis
	Project selection/Capital allocation by Ranking method
Miscellaneous	Units Conversion Calculators
	Units Conversion factors
	Mechanical Engineering Calculators
	Petroleum Engineering Calculators
	Chemical Engineering Calculators
General	pH & pOH Of Aqueous Solution
	Cell Growth
Nucleic Acids	Concentration Of Nucleic Acids
	Molecular Weight of DNA Molecule
Polymerase Chain Reaction	Melting Temperature of DNA Strand
Proteins	Protein Quantification
Centrifugation