Last updated: November 4, 2025
Hi! We built psigtopsia.com under the Shahab Dev software ecosystem to remove confusion between gauge pressure (PSIG) and absolute pressure (PSIA). Too many calculators ignore the role of atmospheric pressure (Patm) or hide the underlying math. Ours makes every calculation transparent, customizable, and instant.
About the Author & Development Team
psigtopsia.com is owned and maintained by Shahabuddin, founder of Shahab Dev. Shahab is a software engineer and technical architect specializing in high-precision Web applications, AI automation, custom CRM software, and engineering computational tools.
Our goal is to build accessible, lightning-fast, and mathematically rigorous online tools for engineers, technicians, and students around the globe. You can connect with Shahab on LinkedIn or reach out directly via email at admin@shahabdev.com.
What the Tool Does
- Two-way PSIG ↔ PSIA conversion using the foundational formula PSIA = PSIG + Patm.
- Adjustable Patm with quick presets (sea level ≈14.6959 psi, standard 1 atm = 14.7 psi, high-altitude ≈12.2 psi) or custom atmospheric inputs.
- Precision control to suit classroom work, HVAC maintenance, shop-floor air compressors, or industrial hydraulics.
- Handy utility actions: copy results, clear inputs, and live pressure gauge visualizations.
Engineering Principles & Quality Assurance
- Mathematical Precision: All formulas and atmospheric assumptions are explicitly documented based on standard thermodynamic tables.
- Privacy by Default: No account, cookies, or personal tracking required to convert units.
- Speed & Accessibility: Zero-dependency client-side execution that loads instantly on mobile devices.
Say Hello or Get Support
Got feedback, a bug report, or a feature request? Reach out via our contact page or message us on WhatsApp (+923469366699).
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Important: This site is for educational and general engineering guidance. Always verify pressure readings with calibrated physical gauges before operational use.