The Ultimate Gasfitter's Toolkit
Ditch the separate apps and reference books. Get instant unit conversions, geometric volume calculations, and custom vent sizing—all mathematically verified and tailored for gas professionals.
Demo Video Coming Soon
Core Capabilities & Audit-Ready Reporting
Stop wasting time jumping between multiple apps and manual calculations. GasCalc provides a centralized suite of precision utilities for your day-to-day gasfitting tasks.
Instant Unit Converter
Seamlessly convert between critical gas units: Pressure (kPa, mbar, inWG), Power (kW, MJ/h, BTU), Flow Rate (m³/h, L/s), and Temperature. No more manual multiplication errors.
Complex Volume Sizer
Calculate simple rectangular and cylindrical volumes, or use the Complex Room Sizer to add multiple room segments and subtract bulkheads for precise purging or ventilation geometry.
Custom Vent Manager
Calculate the exact Net Free Area (NFA) for custom ventilation solutions. Works for louvers, drilled holes, meshes, and rectangular cutouts, saving your favorites for quick reuse.
Mathematical Audit Trail
Every conversion, volume sizing, and vent calculation generates a transparent, step-by-step breakdown. Never second-guess how a result was derived.
Field-Optimized Interface
Instantly switch between different utilities through a responsive, tabbed interface designed for quick use on mobile devices while out in the field.
Instant Report Integration
Click 'Add to Report' on any utility to seamlessly compile your conversions and geometric sizings into a professional, inspector-ready PDF.
How the Utilities Work
The Quick Utilities module is designed to solve the everyday mathematical hurdles of commercial and domestic gasfitting.
Select Your Utility
Choose between the Unit Converter, the Geometric Volume Calculator, or the Vent Manager using the intuitive tabbed interface.
Input Your Data
Enter your known values. The interface is optimized for speed, providing instant, real-time results as you type without needing to press "Calculate".
Export to Report
Found the number you need? Instantly copy the result to your clipboard or append the full calculation trail to your digital GasCalc report for audit compliance.
Legislative Framework
AS/NZS 5601 Standard Conditions
Basic geometric volume calculations represent "Water Capacity." For accurate gas load determination or purging calculations (Appendix F), you must apply Pressure and Temperature correction factors to convert to Standard Conditions (15°C, 101.325 kPa).
Mathematical Precision
Our unit conversions are built using strict scientific factors to ensure your reports stand up to rigorous inspector audits.
GasCalc Context
While these standalone utilities handle the raw geometry, GasCalc automatically handles standard volumetric conversions in the dedicated Purging and Airflow modules.
Ready to Streamline Your Gas Calculations?
Join modern gas professionals who have traded error-prone manual math for GasCalc's precise, standardized toolkit.
Subscribe NowInstant access to all calculators and reporting tools.