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Best +online Duculator Apps

221+ iOS apps curated and reviewed

4.5 avg rating
16 free apps
Updated June 2026

Finding the right +online duculator apps can be overwhelming with so many options. We've analyzed 221+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top +online Duculator Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1CE HVAC Pro+CE HVAC Pro+Free4.7★ (1.6K)NoNoJul 2026
2Unit Converter - Convert allUnit Converter - Convert allFree4.6★ (13K)YesYesJul 2026
3measureQuick HVACmeasureQuick HVACFree5.0★ (5)NoNoJul 2026
4SMACNA Duct-U-LatorSMACNA Duct-U-LatorFree5.0★ (1)NoNoMay 2026
5Pipe Trades Pro CalcPipe Trades Pro CalcFree4.8★ (3.6K)NoYesJul 2026
6Duct Calculator - DuctCalcDuct Calculator - DuctCalcFree5.0★ (7)NoYesJul 2026
7Ref ToolsRef ToolsFree3.8★ (47)NoNoJul 2026
8Baker HVAC Pro+Baker HVAC Pro+Free4.9★ (587)YesNoJul 2026

Top Picks for +online Duculator

CE HVAC Pro+#1

CE HVAC Pro+ by Watsco, Inc.

HVAC Tools
Editor's Choice
📊 Productivity
4.7😐(1.6K ratings)
Free
CE HVAC Pro+ screenshot 1
CE HVAC Pro+ screenshot 2
CE HVAC Pro+ screenshot 3
CE HVAC Pro+ screenshot 4
CE HVAC Pro+ screenshot 5
CE HVAC Pro+ screenshot 6

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.

What We Love

  • 👍 Great customer service
  • 🚀 Time-saving tool
  • 📚 Helpful technical information
  • 🔍 Useful inventory and pricing lookup

Room to Improve

  • 🐛 App crashes and bugs
  • ⏱️ Slow performance and loading times
  • 🔍 Incomplete product information
Unit Converter - Convert all#2

Unit Converter - Convert all by oWorld Software

Currency, Temperature, Length
Strong Contender
✈️ Travel
4.6😐(13K ratings)
FreeAdsIn-App Purchases
Unit Converter - Convert all screenshot 1
Unit Converter - Convert all screenshot 2
Unit Converter - Convert all screenshot 3
Unit Converter - Convert all screenshot 4
Unit Converter - Convert all screenshot 5
Unit Converter - Convert all screenshot 6

Easily convert between various units of measurement, including currencies, temperature, length, and weight. This intuitive tool provides real-time currency exchange rates and a comprehensive list of conversions for everyday use.

What We Love

  • 🚀 Easy to use
  • 🚀 Comprehensive unit conversions
  • 👍 Helpful app
  • 👍 Practical for engineering and mechanics

Room to Improve

  • 🔍 Too many ads
  • 🔍 Ads make the app unusable
  • 🔍 Ads are invasive and disrupt user experience
measureQuick HVAC#3

measureQuick HVAC by Manifold Cloud Services Ltd.

Connect. Perform. Prosper.
Worth Considering
📊 Productivity
5.0😐(5 ratings)
Free
measureQuick HVAC screenshot 1
measureQuick HVAC screenshot 2
measureQuick HVAC screenshot 3
measureQuick HVAC screenshot 4
measureQuick HVAC screenshot 5
measureQuick HVAC screenshot 6

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.

What We Love

  • 👍 Excellent diagnostic tool
  • 🚀 Improves efficiency and standardization
  • 💡 Elevates the HVAC industry
  • 👍 Useful for both experienced and junior technicians

Room to Improve

  • 🐛 Frequent crashes and stability issues
  • 🔒 Too much personal information required
  • 💰 Overpriced, especially for the paid features

More +online Duculator apps to explore

4
SMACNA Duct-U-Lator
SMACNA Duct-U-Lator
SMACNA Duct-U-Lator
Size Simple HVAC Duct Runs
Free

This tool simplifies HVAC duct sizing for professionals. It quickly calculates dimensions for rectangular, round, and oval ducts based on airflow, friction loss, and velocity, ensuring optimal ventilation system performance.

Rectangular, round, and oval duct sizingReal-time calculation updatesConverts duct shapes and sizes
💼 Business
(1)
free
5
Pipe Trades Pro Calc
Pipe Trades Pro Calc
Pipe Trades Pro Calc
Calculator | Welding & Piping
Free

This app provides advanced calculation tools and comprehensive data for pipe trade professionals. It streamlines workflows for pipefitters, welders, and steamfitters with features for measurements, fluid dynamics, and material specifications. Designed for efficiency and accuracy, it works offline for on-site use.

Advanced measurement calculationsFluid dynamics and pressure analysisComprehensive pipe data access
🔧 Utilities
(3.6K)
free with in-app purchases
6
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
7
Ref Tools
Ref Tools
Ref Tools
All-in-one HVACR app
Free

This app provides HVACR technicians with essential tools and information for field service. It includes refrigerant calculators, troubleshooting guides, product finders, and access to spare parts. Listen to educational podcasts to enhance your knowledge on the go.

Refrigerant Slider for P/T calculationsSolenoid valve coil testing toolRefrigeration system troubleshooting guide
🔧 Utilities
(47)
free
8
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
(587)
ad-supported
9
Sporty's E6B Flight Computer
Sporty's E6B Flight Computer
Sporty's E6B Flight Computer
Calculator for pilots
$9.99

This aviation calculator app offers 27 functions for navigation, fuel calculations, and conversions. It includes a versatile timer for tracking multiple time zones and performing countdowns with alerts. Designed for pilots, it simplifies complex flight planning and in-flight computations.

27 Aviation Functions22 Aviation ConversionsNavigational Calculations
🗺️ Navigation
(5K)
paid
10
Race Stats: Speedo and G Force
Race Stats: Speedo and G Force
Race Stats: Speedo and G Force
Speedometer 1/4 0-60 0-100
Free

Track your vehicle's performance with real-time GPS speed and G-force readings. Measure acceleration from 0-60 mph or 0-100 km/h, and time your 1/4 mile or 400m runs. Simulate drag races and analyze your car's capabilities to improve driving speed.

GPS speed trackingReal-time G-force measurement0-60 mph / 0-100 km/h timer
🔧 Utilities
(628)
ad-supported
11
Ductulator - Duct Sizing
Ductulator - Duct Sizing
Ductulator - Duct Sizing
HVAC Duct Design Calculator
$3.99

Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.

Instant duct sizingFriction rate or velocity calculationMultiple valid duct dimensions
📊 Productivity
(272)
free
12
Conduit Bending
Conduit Bending
Conduit Bending
Electrical Conduit Bender
Free
$9.99 | 100% OFF

This app simplifies electrical conduit bending calculations with expert-designed tools. It offers advanced fractional and unit conversion capabilities, supporting a wide range of bend types for precise results. Easily switch between imperial and metric units and choose from predefined benders.

Advanced fractional calculationsImperial and metric unit conversionSupport for numerous bend types
📊 Productivity
(478)
free with in-app purchases
13
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
Determine refrigerant data
Free

This tool quickly determines refrigerant data, including properties, safety groups, GWP, and ODP. It offers intuitive temperature-to-pressure conversion and supports both metric and imperial units. Access detailed information and links to online resources for over 100 refrigerants.

Refrigerant data lookupTemperature-to-pressure conversionMetric and imperial unit support
🔍 Reference
(1.1K)
free
14
DuctCalc.Ca
DuctCalc.Ca
DuctCalc.Ca
Ductulator Duct Calculator
Free

This utility app calculates duct dimensions and air velocity using two methods: Equal Friction and Velocity. It supports both round and rectangular ducts, offering precise calculations for HVAC professionals. Offline functionality is available with a subscription.

Duct sizing calculatorEqual Friction MethodVelocity Method
🔧 Utilities
(20)
free with in-app purchases
15
EPA 608 Practice Test 2026
EPA 608 Practice Test 2026
EPA 608 Practice Test 2026
Prepare for your Certification
Free

Prepare for your EPA 608 HVAC certification with over 500 practice questions and smart analytics. This app offers offline access, topic-based study, mock tests, and personalized plans to help you pass on your first attempt.

500+ practice questionsSmart analyticsOffline access
📚 Education
(2.5K)
free with in-app purchases
16
Waterspeed: Track Watersports
Waterspeed: Track Watersports
Waterspeed: Track Watersports
Wing Sail Windsurf SUP Kayak
Free

Track your performance across over 30 water sports, including sailing, wingfoiling, and kayaking. Analyze speed, distance, wind, and more to understand your progress and improve your skills. Plan your sessions with integrated forecasts and stay safe with live tracking.

Track 30+ water sports sessionsAnalyze speed, distance, wind, and performance metricsLog gear and equipment usage
💪 Health & Fitness
(1.1K)
freemium
17
Physics++
Physics++
Physics++
with Formula Calculators
$0.99

This app provides a comprehensive collection of over 120 physics formulas across various topics like mechanics, relativity, and thermodynamics. It includes a search function, unit conversions, and physics constants, with many formulas featuring integrated calculators for easy problem-solving.

120+ physics formulasMechanics, relativity, thermodynamics coverageSearch function for formulas
📚 Education
(8)
paid
18
McCalc Fusion Calculator
McCalc Fusion Calculator
McCalc Fusion Calculator
HDPE/PP Pressure Calculator
Free

This app calculates the correct fusion pressure for HDPE and Polypropylene pipe jobs. It simplifies the process by selecting your fusion machine and entering pipe details to determine the recommended theoretical gauge pressure.

Select McElroy fusion machinesChoose from nine international standardsEnter pipe size in multiple units
💼 Business
(18)
free
19
Water Flow Calculators
Water Flow Calculators
Water Flow Calculators
by Waterous
Free

This educational app provides calculations for water flow using friction loss, smooth nozzle, NFA, and Iowa formulas. It's designed for professionals and students needing quick and accurate fluid dynamics computations.

Friction loss calculationsSmooth nozzle calculationsNFA formula support
📚 Education
(5)
free
20
WinFab - Sheet Metal Ductulator
WinFab - Sheet Metal Ductulator
WinFab - Sheet Metal Ductulator
by pasquale dipaola
$3.99

This app calculates the correct dimensions for sheet metal ductwork. It simplifies the process of determining airflow and pressure drop for HVAC systems. Essential for professionals in the sheet metal and HVAC industries.

Duct sizing calculationAirflow determinationPressure drop calculation
💼 Business
(6)
paid

FAQ about +online Duculator

What are the best +online duculator apps for iPhone?
CE HVAC Pro+ tops our +online duculator apps ranking as of June 2026, with a 4.7-star average from 1.6K App Store ratings, and it's free to download.
Yes — 16 of the top +online duculator apps we rank are free to download, including CE HVAC Pro+ and Unit Converter - Convert all.
CE HVAC Pro+ has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 221+ +online duculator apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
The app is designed for HVAC technicians, offering features like checking warranty entitlement, available inventory, order status, and accessing technical specifications for HVAC models. It aims to save technicians time and money by providing easy access to essential information and support.
Key features include real-time product availability and pricing, order status tracking with notifications, video/text technical support from expert agents, quick warranty verification, a free inventory management tool called EasyStock, access to various documents like spec sheets and installation guides, and specialized HVAC calculators.