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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, B_g and Sg for a given Composition

Gas Properties - II: Z, ì, B_g 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

Relative Centrifugal Force

Sedimentation Time

Measurement Units

Particulate Density Units Conversion

Miscellaneous

Nanotechnology Calculators

Chemistry Calculators

Chemical Structure

Molecular Modeling

Particle Properties

Surface Areas & Volumes

Aerodynamic Diameter

Settling Velocity

Processing

Energy Requirement In Size-Reduction Operation

Measurement Units

Particulate Density Units Conversion

Miscellaneous

Chemistry Calculators

Chemical Engineering Calculators

Mechanics

Vector addition

Newton's laws of motion

Equilibrium of rigid body under coplanar forces

Simple machines

Heat

Thermal expansion

Kinetic theory

Sound

Speed of sound in gases

Doppler Effect

Electricity

Alternating current

Electric fields

Light

Reflection & Spherical Mirrors

Lensmaker's Equation

Nuclear

Hydrogen atom energy levels

Nuclear Fission

Measurement Units

Units Conversion Calculators

Units Conversion factors

Miscellaneous

Chemistry Calculators

Mechanical Engineering Calculators

Other Calculators

Atomic Structure

Periodic Table of Elements

Formulas&Composition

Hydrochloric Acid Preparation

Gases

Molar Mass of a gas

Calorimetry

Heat & Change Of Phase Of Water

Concentration&Solutions

Dilution Of Solutions

Osmotic Pressure

Acids & Bases

Acid-Base Titration

Equilibrium Constant

Electrochemistry

Faraday's Laws of Electrolysis

Chemical Kinetics

Arrhenius equation & Reaction rates

Measurement Units

Units Conversion Calculators

Units Conversion factors

Miscellaneous

Chemical Engineering Calculators

Physics Calculators

Other Calculators