Best Engineering Calculator Hvac Apps

HVACR Check & Charge

PT Charts Superheat Subcooling

Free

This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.

SuperCool Slide Rule HVAC

by Designstein, llc

Free

This app offers a comprehensive suite of tools for HVAC technicians. It provides interactive guides, step-by-step repair instructions, and calculators for various HVAC calculations including superheat, subcooling, and duct sizing.

IN HVAC Calculator

HVAC Calculator & Reference

Free

This app provides HVAC inspection tools and guidelines for home inspectors. It helps estimate equipment age, size, and requirements, giving inspectors confidence in their reports.

HVAC Pro Calculator: NEC + P-T

Duct · Voltage · Refrigerant

Free

This app provides essential tools for HVAC technicians and electricians, including BTU load sizing, duct calculations, and refrigerant pressure-temperature charts. It offers a free tier with core functions and an optional Pro upgrade for advanced features like voltage drop calculations and unlimited job saving.

P-T Calculator

by National Refrigerants, Inc.

Free

This tool simplifies HVAC/R technician tasks by calculating pressure/temperature relationships, superheat, and subcool. It automatically adjusts for altitude and offers English/Metric units. Easily access favorite refrigerants and supplementary information.

Heating & Cooling HVAC Pro+

HVAC Tools

Free

This app provides HVAC professionals with quick access to product information, tools, and support. It allows users to check pricing, availability, find locations, and manage warranty claims. Features include a PT calculator, duct calculators, and a flashlight tool for on-site work.

HVAC Mastery

Learn the HVAC Trade

Free

This app provides hands-on learning for HVAC professionals, covering fundamentals, core and advanced systems, and EPA 608 certification prep. It features interactive diagrams, simulators, real-world challenges, and quick reference tools for on-the-job use.

HVAC Test Prep Practice 2026

Practice HVAC Exam Questions

Free

Prepare for your HVAC certification exam with a comprehensive practice test simulator. Access over 1,500 questions with detailed analysis and track your progress. Get ready to pass with confidence.

HVAC Formulator

For HVAC Professionals

$4.99

This app provides HVAC professionals with over 900 essential formulas and calculations for load calculations and system design. It supports both US and Metric units, offers instant switching, and includes 23 calculator categories and over 460 unit conversions. Designed for field use, it works offline and allows users to save and share results.

AC Service Tech LLC

by AC Service Tech, LLC

Free

This app provides a comprehensive platform for HVAC/R technicians and students to access educational resources. It features training videos, calculators, online courses with certificates, articles, and podcast episodes, all in one convenient location.

Ventora - AI HVAC Assistant

HVAC Calculators & Diagnostics

Free

This app provides HVAC technicians with an AI assistant for diagnostics, professional-grade calculators, and offline code references. It helps troubleshoot issues, size ducts, calculate efficiency ratings, and access industry standards quickly in the field.

SAMSUNG HVAC

by GBRiX KOREA LLC

Free

This app provides HVAC professionals with tools for product registration, warranty claims, and technical document access. It includes features for error code lookup, refrigerant property analysis, and product comparison to streamline fieldwork.

HVAC Manual Boss

ACCA Manual J/S/D Calculator

Free

This app streamlines HVAC load calculations, enabling users to quickly generate Manual J, S, and D outputs. It allows for on-the-spot pricing and uses real-world data for accurate estimates, even while on-site.

HVAC Load Calculator Manual J

BTU Sizing for Contractors

Free

$1.99 | 100% OFF

This app provides professional HVAC load calculations for contractors, offering three levels of accuracy from quick estimates to detailed Manual J calculations. It's designed for field use with an intuitive interface, offline capabilities, and professional report generation.