Engineering Tools

Oil & Gas Engineering Calculators

Practical, standards-aware calculators for engineers, by an engineer.

Select a discipline to open calculation tools with selectable units, governing formulas, reset controls and calculation history.

AccurateFormulas
StandardsAligned
Multi-UnitConversions
PracticalEngineering Use

Calculator Categories

Select an engineering discipline

Calculation History Control

Delete saved calculation history from every Engineering Calculator on this website.

Centrifugal pump

Pumps

Hydraulic power, shaft power, NPSH, specific speed, affinity laws and preliminary pump selection.

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Piping system

Piping & Hydraulics

Velocity, Reynolds number, pressure drop, fittings, equivalent length and line sizing.

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Industrial compressor

Compressors

Gas properties, compression ratio, discharge temperature, head, power and operating checks.

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Ejector and eductor

Ejectors & Eductors

Steam/gas ejector nozzle, mixing, shock and diffuser checks; liquid eductor flow ratio, sizing, cavitation, staging and pump-down time.

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Chemical injection package

Chemical Injection

Injection rate, pump capacity, tank autonomy, concentration and package sizing checks.

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Storage tank and vessel

Tanks & Vessels

Tank volume, liquid inventory, thickness, FRP/GRP calculations, retention time and preliminary sizing.

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Heat exchanger

Heat Transfer

Heat duty, LMTD, exchanger area, utility flow, effectiveness and insulation calculations.

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Instrumentation

Instrumentation

4–20 mA scaling, differential-pressure level, pressure conversion and range checks.

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Engineering unit conversion

Engineering Unit Converters

Pressure, flow, temperature, power, energy, viscosity, density and length conversions.

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Electrical Engineering

Electrical Engineering

Load demand, transformers, generators, motors, cable sizing, short circuit, protection and power quality.

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Bulk material handling

Bulk Material Handling

Material properties, storage bins, conveyors, elevators, feeders, chutes and dust control.

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Engineering-use notice: These tools support preliminary checks, learning and independent verification. Final design must use approved project data, applicable codes, vendor curves, certified software and competent engineering review.