Instrument Calculator Hub
Welcome to the Instrument Calculator Hub. These calculators are designed for quick and easy use in the process industries, and built to support the instrumentation profession.
Available Calculators
Each calculator opens instantly and focuses only on the selected function — simple, fast, and accurate for field engineers and technicians.
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About This App
Created by Sheik Abdullah, an Instrumentation & Control professional with many years of hands‑on experience in EPC projects, commissioning, and operations across power plants, oil & gas, and energy sectors.
This tool is built to support the global instrumentation community — helping engineers, technicians, and students work smarter, faster, and with confidence.
I welcome your feedback, suggestions, or ideas for improvement. Please share your thoughts at info@instrumentationhub.org
More at Instrumentation Hub
Study guides on pressure, flow, level, temperature, transmitters and control valves, a community forum for field questions, and a help desk. All at instrumentationhub.org
References. Thermocouples: NIST ITS-90 reference functions. RTDs: IEC 60751 Callendar–Van Dusen. Signal status: NAMUR NE 43. Valve Cv: simplified ISA/vendor equations for first-pass sizing; confirm final sizing to IEC 60534-2-1.
Check results against your own standards before using them for calibration or design.