Best Hvac Calculator Load Lite Apps

216+ iOS apps curated and reviewed

4.5 avg rating
17 free apps
Updated May 2026

Looking for free hvac calculator load lite apps? 17 of our 216+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Hvac Calculator Load Lite

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
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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.

Bluon HVAC#3

Bluon HVAC by Bluon, Inc.

HVAC Tools
Worth Considering
🔧 Utilities
4.8😐(4.4K ratings)
FreeAds
Bluon HVAC screenshot 1
Bluon HVAC screenshot 2
Bluon HVAC screenshot 3
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Bluon HVAC screenshot 5
Bluon HVAC screenshot 6

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.

What We Love

  • 🤖 Helpful tech support
  • 💯 Comprehensive database of manuals and information
  • 🛠️ Useful tools and calculators
  • 🤝 Great customer service

Room to Improve

  • 💰 Paywall for advanced features
  • 🔒 Limited access without company account
  • 🔍 Missing manuals for some equipment models

More Hvac Calculator Load Lite apps to explore

4
HVAC Load Calculator Manual J
HVAC Load Calculator Manual J
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.

Multiple accuracy levels (Simple, Moderate, Pro)Offline-ready calculationsProfessional PDF report generation
🔧 Utilities
(28)
free with in-app purchases
5
Concrete Calculator Plus
Concrete Calculator Plus
Concrete Calculator Plus
by Inch Calculator
Free

This app provides 15 calculators for estimating concrete, blocks, mortar, rebar, and gravel. It supports various shapes and units, offering material cost estimations for construction projects.

15 concrete estimation calculatorsEstimates cubic yards or bagsCalculates material costs
🔧 Utilities
(21K)
ad-supported
6
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
7
Heating & Cooling HVAC Pro+
Heating & Cooling HVAC Pro+
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.

View pricing and order statusReal-time product availabilityFind branch locations and hours
📊 Productivity
(42)
ad-supported
8
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
9
Gemaire HVAC Pro+
Gemaire HVAC Pro+
Gemaire HVAC Pro+
HVAC Tools
Free

This app provides HVAC professionals with essential tools and product information to streamline their work. Access pricing, order status, real-time availability, and technical support. It also includes inventory management, warranty services, and helpful calculators.

View pricing and order statusReal-time product availabilitySearch for HVAC models and parts
📊 Productivity
(798)
free with in-app purchases
10
Baker HVAC Pro+
Baker HVAC Pro+
Baker HVAC Pro+
HVAC Tools
Free

This app provides HVAC/R professionals with on-the-go access to product information and essential tools. It features real-time order tracking, a duct calculator, warranty verification, and branch location details. Users can also search for parts, view technical documents, and receive special offer notifications.

Real-time order statusDuct calculatorProduct availability and pricing
📊 Productivity
(570)
ad-supported
11
PCalc Lite
PCalc Lite
PCalc Lite
The Best Calculator
Free

This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.

Optional RPN modeMultiple undo and redoUnit conversions and constants
🔧 Utilities
(213)
free with in-app purchases
12
measureQuick HVAC
measureQuick HVAC
measureQuick HVAC
Connect. Perform. Prosper.
Free

This application helps HVAC technicians diagnose and repair systems quickly and accurately. It offers robust diagnostic tools to identify problems faster, leading to fewer callbacks and more satisfied customers. It supports various HVAC systems, making it an all-in-one solution for professionals.

Quick HVAC system diagnosisAccurate repair solutionsReduced troubleshooting time
📊 Productivity
(5)
free
13
OneCalc: All-in-one Calculator
OneCalc: All-in-one Calculator
OneCalc: All-in-one Calculator
Calculates everything. Try it.
Free

This app offers a comprehensive suite of over 40 calculators and unit converters for various needs, including finance, health, construction, and everyday math. It features standard, scientific, and specialized calculators for tasks like loan amortization, currency conversion, and material estimation.

Over 40 calculators and unit convertersStandard and scientific calculator functionsFinancial calculators (interest, loan, currency)
📊 Productivity
(4.8K)
free with in-app purchases
14
P-T Calculator
P-T Calculator
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.

Pressure/Temperature calculationSuperheat/Subcool calculationAutomatic altitude correction
🔍 Reference
(51)
free
15
HVAC PT Chart
HVAC PT Chart
HVAC PT Chart
HVAC Pressure/Temp Charts
Free

This tool provides HVAC technicians with instant access to pressure and temperature data for over 100 refrigerants. It allows users to input one value to find the other, view detailed refrigerant properties, and email comprehensive charts and data.

Pressure/temperature lookup for 100+ refrigerantsInput temperature to find pressure, or vice versaSlider control for precise value selection
📊 Productivity
(8)
free
16
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
17
HVAC Toolkit
HVAC Toolkit
HVAC Toolkit
HVAC calcs for all your needs
$23.99

This comprehensive toolkit offers essential HVAC calculations and tools for professionals. It combines multiple specialized applications into a single, convenient package for iPhone and iPad users.

Equipment tracking and customizationRefrigerant pressure-temperature chartsRefrigerant charge calculations
📊 Productivity
(2)
paid
18
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
19
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
20
Feet and Inches Calculator
Feet and Inches Calculator
Feet and Inches Calculator
Perfect Construction Calc!
Free

A powerful construction calculator designed for tradespeople. It offers a wide range of tools for estimating, layout, framing, and jobsite calculations, helping to save time and improve accuracy. Supports both imperial and metric units.

Construction math and estimatingLayout, framing, and jobsite calculationsImperial and metric unit conversion
🔧 Utilities
(384)
free with in-app purchases