Best In Hvac Calculator Apps

250+ iOS apps curated and reviewed

3.5 avg rating
14 free apps
Updated August 2026

With an average user rating of 3.5★, the in hvac calculator category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.

Compare top In Hvac Calculator Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1IN HVAC CalculatorIN HVAC CalculatorFree4.2★ (11)NoNoAug 2026
2HVAC & Sheet Metal CalculatorHVAC & Sheet Metal CalculatorFree was $29.994.9★ (75)NoYesAug 2026
3HVACR Check & ChargeHVACR Check & ChargeFree4.8★ (17K)NoNoAug 2026
4HVAC Tech ToolkitHVAC Tech ToolkitFree was $4.99NoYesMay 2026
5AirCalc HVACAirCalc HVACFreeNoYesAug 2026
6HVAC SchoolHVAC SchoolFree4.8★ (81)NoNoJul 2026
7BaseCalc HVAC CalculatorBaseCalc HVAC CalculatorFreeNoYesJul 2026
8HVAC Calculator: BTU & AC LoadHVAC Calculator: BTU & AC LoadFreeNoJul 2026

Top Picks for In Hvac Calculator

IN HVAC Calculator#1

IN HVAC Calculator by Gregory Enterprises

HVAC Calculator & Reference
Editor's Choice
🔧 Utilities
4.2(11 ratings)
Free
IN HVAC Calculator screenshot 1
IN HVAC Calculator screenshot 2
IN HVAC Calculator screenshot 3
IN HVAC Calculator screenshot 4

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 & Sheet Metal Calculator#2

HVAC & Sheet Metal Calculator by Calculated Industries

Construction Math & Trade Pro
Strong Contender
🔧 Utilities
4.9(75 ratings)
FreeIn-App Purchases
HVAC & Sheet Metal Calculator screenshot 1
HVAC & Sheet Metal Calculator screenshot 2
HVAC & Sheet Metal Calculator screenshot 3
HVAC & Sheet Metal Calculator screenshot 4
HVAC & Sheet Metal Calculator screenshot 5
HVAC & Sheet Metal Calculator screenshot 6

This app provides advanced calculations for HVAC and sheet metal professionals. It simplifies complex dimensional math, geometry, and trigonometry with specialized functions for ducting, airflow, and construction layouts. Offers a free trial before committing to a subscription.

HVACR Check & Charge#3

HVACR Check & Charge by Copeland LP

PT Charts Superheat Subcooling
Worth Considering
🔍 Reference
4.8😊(17K ratings)
Free
HVACR Check & Charge screenshot 1
HVACR Check & Charge screenshot 2
HVACR Check & Charge screenshot 3
HVACR Check & Charge screenshot 4
HVACR Check & Charge screenshot 5
HVACR Check & Charge screenshot 6

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.

What We Love

  • 🚀 Convenient
  • 🚀 Great program
  • 🚀 Reliable app
  • 🚀 Easy and quick charging reference

Room to Improve

  • 🐛 Pressure settings not helpful
  • 🔒 Concerning privacy policy
  • 🐛 Restricted temperature range

More In Hvac Calculator apps to explore

4
HVAC Tech Toolkit
HVAC Tech Toolkit
HVAC Tech Toolkit
by Matthew Catchpole
Free
$4.99 | 100% OFF
💼 Business
(0)
5
AirCalc HVAC
AirCalc HVAC
AirCalc HVAC
Toolbox in your pocket
Free
🔧 Utilities
(0)
6
HVAC School
HVAC School
HVAC School
By Techs For Techs
Free

This app serves as a comprehensive resource for HVAC technicians, offering a podcast, tech tip articles, and interactive calculators. It aims to enhance knowledge of HVAC theory, industry updates, and essential mathematics for both current and aspiring professionals.

HVAC School podcast episodesTech tip articles by professionalsInteractive HVAC equation calculators
📚 Education
(81)
free
7
BaseCalc HVAC Calculator
BaseCalc HVAC Calculator
BaseCalc HVAC Calculator
BTU CFM Duct Calculator
Free
🔧 Utilities
(0)
8
HVAC Calculator: BTU & AC Load
HVAC Calculator: BTU & AC Load
HVAC Calculator: BTU & AC Load
by Coffee Room SIA
Free
🔧 Utilities
(0)
9
HVAC Duct Calculator
HVAC Duct Calculator
HVAC Duct Calculator
Duct sizing made simple
Free
🔧 Utilities
(0)
10
HVAC Pro: Load & Duct Sizing
HVAC Pro: Load & Duct Sizing
HVAC Pro: Load & Duct Sizing
Professional HVAC Load Tools
$9.99
🔧 Utilities
(0)
11
Engineering Calculator HVAC
Engineering Calculator HVAC
Engineering Calculator HVAC
by aleksandr bronnikov
Free
🔧 Utilities
(0)
12
Duct Calculator Pro
Duct Calculator Pro
Duct Calculator Pro
by Imran Pinjara
$3.99

This tool assists HVAC professionals and students with quick and precise calculations for duct sizing, airflow velocity, and airflow rate. It works offline and features a user-friendly interface for efficient project work.

Duct size calculationAirflow velocity (FPM) calculationAirflow rate (CFM) calculation
🔧 Utilities
(1)
paid
13
HVAC-calculator
HVAC-calculator
HVAC-calculator
by Trond Rossvoll
$4.99

This app provides quick and easy calculations for HVAC professionals and enthusiasts. It simplifies complex formulas for energy use, airflow, and duct dimensions, making them accessible on your iPhone or iPad.

SFP calculationsHeat recovery efficiencyAir velocity in ducts
📊 Productivity
(1)
paid
14
HVAC Pro Calculator: NEC + P-T
HVAC Pro Calculator: NEC + P-T
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.

BTU & Cooling Load SizingDuct Sizing CalculationsNEC Voltage Drop & Wire Sizing
🔧 Utilities
(1)
freemium
15
HVACSize
HVACSize
HVACSize
Manual J Load Calculator
Free
🔧 Utilities
(0)
16
HVAC Formulator
HVAC Formulator
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.

Over 900 formulas and calculationsUS & Metric unit support23 calculator categories
📊 Productivity
(1)
paid
17
HVAC Visual Learning Studio
HVAC Visual Learning Studio
HVAC Visual Learning Studio
Visual HVAC Design Companion
$2.99
$9.99 | 70% OFF
📚 Education
(0)
18
HVAC ToolKit
HVAC ToolKit
HVAC ToolKit
Useful tool for HVAC engineers
$9.99

This application provides HVAC engineers with tools for design checks and quick calculations. It offers various calculators for ducting friction, pipe sizing, ventilation, and heat load estimations, with clear instructions and formulas. Users can switch between metric and imperial units, and English or Arabic languages.

Friction loss calculationsPipe sizing toolsVentilation and pressurization calculators
📊 Productivity
(1)
paid
19
HVAC Calc: Superheat & P/T
HVAC Calc: Superheat & P/T
HVAC Calc: Superheat & P/T
Subcooling, Delta-T, Duct, CFM
Free
🔧 Utilities
(0)
20
HVAC Tools PT Chart - Gauge
HVAC Tools PT Chart - Gauge
HVAC Tools PT Chart - Gauge
Superheat, PT Chart & Service
Free
🔧 Utilities
(0)

FAQ about In Hvac Calculator

What are the best in hvac calculator apps for iPhone?
IN HVAC Calculator tops our in hvac calculator apps ranking as of August 2026, with a 4.2-star average from 11 App Store ratings, and it's free to download.
Yes — 14 of the top in hvac calculator apps we rank are free to download, including IN HVAC Calculator and HVAC & Sheet Metal Calculator.
IN HVAC Calculator has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 250+ in hvac calculator apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
IN HVAC Calculator is a reference tool for home inspectors. It provides calculators and guidelines to estimate HVAC equipment age, tonnage, circuit requirements, and combustion air needs, aiding in report writing.
Currently, IN HVAC Calculator is available for iPhone and iPad, but not for Android devices.