--- title: "Ductulator - Duct Calculator - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Professional HVAC duct sizing and psychrometric calculations in one powerful app. DuctCalc replaces your physical ductulator with a modern, accurate digital tool trusted by engineers, contractors, and" --- # Ductulator - Duct Calculator — United States > HVAC Airflow Sizing & Design ![Ductulator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/25/08/77/250877b6-7c01-8e3a-64a3-61d8eaf40482/AppIcon-0-0-1x_U007epad-0-1-85-220.jpeg/434x0w.png) **Developer:** [Mikhail Nikitin](https://apptail.io/developer/mikhail-nikitin-TZwclb) **Category:** Utilities **Rating:** 4.6/5 (33 ratings) **Price:** Free **Bundle ID:** com.ductcalc.app **Store:** Apple App Store **Country:** United States **Version:** 1.0.1 (released 2026-08-24) **Original Release:** 2026-01-07 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6757307937) **AppTail Page:** [https://apptail.io/app/ductulator-duct-calculator-jCzy/united-states](https://apptail.io/app/ductulator-duct-calculator-jCzy/united-states) ## Ductulator Description Professional HVAC duct sizing and psychrometric calculations in one powerful app. DuctCalc replaces your physical ductulator with a modern, accurate digital tool trusted by engineers, contractors, and HVAC professionals. DUCT SIZING CALCULATOR Size round, rectangular, and flexible ductwork with ASHRAE-compliant calculations: • Forward Mode: Enter CFM airflow → Get multiple duct size options with velocity, friction loss, and pressure drop for each • Reverse Mode: Select a duct size → See CFM capacity at minimum, ideal, and maximum velocities Supports 6 duct materials: - Galvanized Steel - Flex Duct (extended & compressed) - Duct Board - Fiberglass Lined - PVC/Plastic FITTINGS & PRESSURE DROP Calculate total equivalent length and pressure loss with 10+ standard fittings: - 90° and 45° Elbows (smooth, 3-piece, mitered) - Tees (branch and straight-through) - Reducers and Transitions - Takeoffs (90° and 45°) - Register Boots PSYCHROMETRIC CALCULATOR Complete humid air property analysis with interactive chart: • 4 Input Modes: Dry bulb + wet bulb, relative humidity, dew point, or humidity ratio • Calculates: Enthalpy, specific volume, vapor pressure, saturation pressure, degree of saturation • Altitude correction for non-standard atmospheric pressure • Visual psychrometric chart showing current state point APPLICATION TYPES Pre-configured velocity limits per ASHRAE/ACCA guidelines: - Residential Supply (400-1000 FPM) - Residential Return (300-800 FPM) - Commercial Low Velocity (600-1500 FPM) - Commercial High Velocity (1000-2500 FPM) PROFESSIONAL FEATURES Imperial (I-P) and Metric (SI) units Airflow in CFM, m³/h, or L/s Color-coded status indicators Real-time validation warnings Built-in reference documentation Standard duct size tables (ASHRAE/SMACNA) WHY DUCTCALC? Unlike other apps that only size ducts OR calculate psychrometrics, DuctCalc combines both essential HVAC tools. No more switching between apps. Professional-grade accuracy in your pocket. Perfect for: • HVAC Engineers • Mechanical Contractors • MEP Design Firms • HVAC Technicians • Building Inspectors • Engineering Students Download DuctCalc and replace your old ductulator with the modern HVAC calculator trusted by professionals. Privacy Policy: Terms of Service: ## Ductulator Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/fe/ec/75/feec751a-e987-0777-6d1a-179e8525c1f3/1.jpg/1284x2778.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/30/e4/ea/30e4ea38-7287-9c36-92e1-d1cfda02d698/2.jpg/1284x2778.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/fe/9a/07/fe9a07a5-c697-9bc3-af11-cbf1e61d0c82/3.jpg/1284x2778.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/45/f5/d4/45f5d4c3-1cf5-eb6f-f6a0-606bba48a4e3/4.jpg/1284x2778.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ee/a0/f6/eea0f602-020f-46df-3692-78fff57e59dc/7.jpg/1284x2778.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/fc/b5/45/fcb54589-f5d6-911e-6afb-31d01addad44/6.jpg/1284x2778.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/2c/a1/38/2ca1389a-2b1b-d96a-dcc5-b49f80dd02ba/5.jpg/1284x2778.png) ## Ductulator Rating Breakdown in United States - 5 stars: 27 (82%) - 4 stars: 3 (9%) - 3 stars: 1 (3%) - 2 stars: 0 (0%) - 1 stars: 2 (6%) ## Ductulator Reviews in United States ### ***** "Pro grade ductulator" Been in the HVAC trade 18 years and this app is an absolute game-changer. Quick CFM-to-duct sizing, round-to-rectangular conversions on the fly, friction loss, all right there on my phone. Saves me time on every job, especially on commercial takeoffs. -- Oliver2716, 2026-04-12 ### *---- "Another deceptive application" Stay away from it. Nothing in the description suggests that any charges. However when you get it installed, you are hit with the highest subscription fees. They tell you that you can use it for 7 days for free but want you to sign up right away and lock any calculation results if you don’t. Say it upfront. Don’t lie. -- NYC_arch, 2026-03-19 ### ***** "Duct Calculator" easy app to read duct sizing -- doxhp, 2026-01-30 [View all Ductulator reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Ductulator In-App Purchases | Item | Price | |------|-------| | premium | $4.99 | ## Ductulator Available In - [United States](https://apptail.io/app/ductulator-duct-calculator-jCzy/united-states) - [United Kingdom](https://apptail.io/app/ductulator-duct-calculator-jCzy/united-kingdom) - [Portugal](https://apptail.io/app/ductulator-duct-calculator-jCzy/portugal) - [Egypt](https://apptail.io/app/ductulator-duct-calculator-jCzy/egypt) - [Mexico](https://apptail.io/app/ductulator-duct-calculator-jCzy/mexico) - [Brazil](https://apptail.io/app/ductulator-duct-calculator-jCzy/brazil) - [Germany](https://apptail.io/app/ductulator-duct-calculator-jCzy/germany) - [Algeria](https://apptail.io/app/ductulator-duct-calculator-jCzy/algeria) - [Estonia](https://apptail.io/app/ductulator-duct-calculator-jCzy/estonia) - [Spain](https://apptail.io/app/ductulator-duct-calculator-jCzy/spain) - [France](https://apptail.io/app/ductulator-duct-calculator-jCzy/france) - [Croatia](https://apptail.io/app/ductulator-duct-calculator-jCzy/croatia) - [Hungary](https://apptail.io/app/ductulator-duct-calculator-jCzy/hungary) - [Ireland](https://apptail.io/app/ductulator-duct-calculator-jCzy/ireland) - [Israel](https://apptail.io/app/ductulator-duct-calculator-jCzy/israel) - [Lithuania](https://apptail.io/app/ductulator-duct-calculator-jCzy/lithuania) - [Nigeria](https://apptail.io/app/ductulator-duct-calculator-jCzy/nigeria) - [Panama](https://apptail.io/app/ductulator-duct-calculator-jCzy/panama) - [Russia](https://apptail.io/app/ductulator-duct-calculator-jCzy/russia) - [Slovenia](https://apptail.io/app/ductulator-duct-calculator-jCzy/slovenia) - [Tunisia](https://apptail.io/app/ductulator-duct-calculator-jCzy/tunisia) - [Türkiye](https://apptail.io/app/ductulator-duct-calculator-jCzy/turkey) - [United Arab Emirates](https://apptail.io/app/ductulator-duct-calculator-jCzy/united-arab-emirates) - [Uzbekistan](https://apptail.io/app/ductulator-duct-calculator-jCzy/uzbekistan) - [Austria](https://apptail.io/app/ductulator-duct-calculator-jCzy/austria) - [Azerbaijan](https://apptail.io/app/ductulator-duct-calculator-jCzy/azerbaijan) - [Bulgaria](https://apptail.io/app/ductulator-duct-calculator-jCzy/bulgaria) - [Switzerland](https://apptail.io/app/ductulator-duct-calculator-jCzy/switzerland) - [Cyprus](https://apptail.io/app/ductulator-duct-calculator-jCzy/cyprus) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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