Best Hvac Load Calculator Apps

224+ iOS apps curated and reviewed

4.2 avg rating
15 free apps
Updated May 2026

If you already know HVAC Load Calculator Manual J, this is the deeper bench. 224+ hvac load calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Top Picks for Hvac Load Calculator

HVAC Load Calculator Manual J#1

HVAC Load Calculator Manual J by Mike Watson

BTU Sizing for Contractors
Editor's Choice
🔧 Utilities
4.7(29 ratings)
FreeIn-App Purchases
HVAC Load Calculator Manual J screenshot 1
HVAC Load Calculator Manual J screenshot 2
HVAC Load Calculator Manual J screenshot 3
HVAC Load Calculator Manual J screenshot 4
HVAC Load Calculator Manual J screenshot 5

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.

HVAC Calculator Load Pro#2

HVAC Calculator Load Pro by Ryan Perchak

Built for HVAC Specialists
Strong Contender
📊 Productivity
4.0(1 ratings)
FreeIn-App Purchases
HVAC Calculator Load Pro screenshot 1
HVAC Calculator Load Pro screenshot 2
HVAC Calculator Load Pro screenshot 3
HVAC Calculator Load Pro screenshot 4
HVAC Calculator Load Pro screenshot 5
HVAC Calculator Load Pro screenshot 6

This tool provides fast, accurate HVAC load calculations for residential systems. It helps professionals size furnaces, air conditioners, and gas equipment correctly, avoiding guesswork and spreadsheets for confident client recommendations and more closed bids.

LaserCalc Mobile#3

LaserCalc Mobile by Imogen Technologies LLC

Worth Considering
💼 Business
3.4(5 ratings)
FreeAdsIn-App Purchases
LaserCalc Mobile screenshot 1
LaserCalc Mobile screenshot 2
LaserCalc Mobile screenshot 3
LaserCalc Mobile screenshot 4

This app assists HVAC professionals with accurate load calculations for residential and commercial projects. It adheres to industry-standard ACCA Manual J 8th Edition guidelines, integrating data from DOE and NREL for precise results.

More Hvac Load Calculator apps to explore

4
Bluon HVAC
Bluon HVAC
Bluon HVAC
HVAC Tools
Free

Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.

500,000+ HVAC unit databaseManuals and part listsAI troubleshooting tool (MasterMechanic)
🔧 Utilities
(4.4K)
ad-supported
5
HVAC Calculator Load Lite
HVAC Calculator Load Lite
HVAC Calculator Load Lite
Built for HVAC Specialists
Free
📊 Productivity
(0)
6
HVACR Check & Charge
HVACR Check & Charge
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.

Instant refrigerant charge calculatorSuperheat calculator (non-TXV)Subcooling calculator (TXV)
🔍 Reference
(17K)
free
7
CE HVAC Pro+
CE HVAC Pro+
CE HVAC Pro+
HVAC Tools
Free

This app provides HVAC technicians with instant access to product information, including warranty status, inventory, and technical specifications. It offers real-time support, order tracking, and helpful calculators to streamline job management and business growth.

Real-time product availability & pricingOrder status and notificationsVideo/Text technical support
📊 Productivity
(1.5K)
free with in-app purchases
8
HVAC Load Plus
HVAC Load Plus
HVAC Load Plus
HVAC cooling and heating loads
$24.99

Perform detailed heating and cooling load calculations for buildings in the field using your iPhone. Access a vast weather database and construction data to generate comprehensive reports that can be emailed or exported to spreadsheets.

Detailed heating and cooling load calculations1000+ city weather databaseExtensive construction type data
📊 Productivity
(5)
paid
9
AirPro: BTU Calculator
AirPro: BTU Calculator
AirPro: BTU Calculator
HVAC Calculator: House Heating
Free

This tool helps you calculate the right size for air conditioners, heat pumps, and furnaces. It provides detailed analysis of heating and cooling costs, energy consumption, and temperature data. You can also evaluate domestic hot water needs and financial aspects like payback periods.

BTU estimation for HVAC systemsMonthly heating and cooling cost calculationEnergy consumption and temperature analysis
📊 Productivity
(5)
free with in-app purchases
10
HVAC Residential Load Calcs
HVAC Residential Load Calcs
HVAC Residential Load Calcs
Calculate cool/heat loads...
$34.99

Perform detailed residential heating and cooling load calculations in the field. This app offers extensive data on building materials, weather, and project management for HVAC engineers and technicians.

Block and room-by-room load calculations1000+ city weather databaseExtensive construction material data
💼 Business
(3)
paid
11
HVAC Load & Refrigerant Calc
HVAC Load & Refrigerant Calc
HVAC Load & Refrigerant Calc
Refrigerant, Manual J & BTU
Free
🔧 Utilities
(0)
12
AC Calculator - HVAC Sizing
AC Calculator - HVAC Sizing
AC Calculator - HVAC Sizing
Air conditioner or Heat Pump
Free

This utility app simplifies HVAC sizing by calculating BTU/h capacity and recommending equipment. It offers unit conversions, price estimates, and energy consumption comparisons. Advanced features can be unlocked via in-app purchases.

Calculate BTU/h capacityRecommend equipment typesConvert BTU, kW, Kcal, Tons
🔧 Utilities
(20)
free with in-app purchases
13
IN HVAC Calculator
IN HVAC Calculator
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.

Equipment circuit requirements calculatorAC tonnage estimation by model numberHVAC manufacture date lookup
🔧 Utilities
(11)
free
14
BTU Calculator -  Data Centers
BTU Calculator -  Data Centers
BTU Calculator - Data Centers
Cooling Requirements
Free

Estimate the cooling capacity needed for your data center. This tool considers factors like space, occupants, and heat output to help you maintain optimal temperature and humidity. It provides instant results as you update inputs, serving as a guide for system selection.

Estimate cooling capacityMaintain 24°C and 30-50% humidityConsider space, occupants, window R-value
🔧 Utilities
(288)
free with in-app purchases
15
HVAC Quick Load
HVAC Quick Load
HVAC Quick Load
Rule-of-thumb HVAC load calcs
$6.99

This app provides quick, rule-of-thumb HVAC load calculations for various building types. It estimates heating and cooling loads, as well as air flows, based on building type, area, and occupancy. Results can be emailed with an Excel spreadsheet attachment for further analysis.

Rule-of-thumb HVAC load calculationsSupports commercial, industrial, and residential buildingsEstimates cooling/heating loads and air flows
📊 Productivity
(3)
paid
16
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
HVAC Sizing & Psychrometric
Free

This app provides professional HVAC duct sizing and psychrometric calculations in a single tool. It offers detailed calculations for various duct types and materials, along with comprehensive humid air property analysis. Designed for HVAC professionals, it replaces traditional ductulators with accurate digital functionality.

Duct sizing for round, rectangular, and flexible ductsFittings pressure drop calculationPsychrometric analysis with interactive chart
🔧 Utilities
(7)
free with in-app purchases
17
Duct Calculator.
Duct Calculator.
Duct Calculator.
HVAC Airflow & Duct Sizing
Free
📊 Productivity
(0)
18
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
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.

Superheat & Subcooling chargingDuct sizing & layout calculatorCompressor windings troubleshooter
🔧 Utilities
(185)
free
19
SwiftSize
SwiftSize
SwiftSize
Quick Heat Load Calculator
$9.99

This HVAC tool quickly calculates residential heating and cooling loads on-site. It streamlines the process for professionals, allowing for faster equipment sizing and more customer consultation time. Generate shareable PDF reports of your calculations.

Quick heat load calculationsOn-site measurementsAccurate equipment sizing
💼 Business
(3)
paid
20
HVAC Calculator ProX
HVAC Calculator ProX
HVAC Calculator ProX
Pro HVAC Load Calculator
$0.99
$1.99 | 50% OFF
🔧 Utilities
(0)

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