Ductulator - Duct Calculator

Name: Ductulator - Duct Calculator
Rating: 4.5 (36 reviews)
Author: Mikhail Nikitin

HVAC Airflow Sizing & Design

Free · In‑App Purchases

36 Ratings
Age Rating

4+
Years
Category

Utilities
Developer

Mikhail Nikitin
Language

EN
English
Size

44.1
MB

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: https://docs.google.com/document/d/1r9oCuYYtQZlKWhZTlrP8Ck73V6NoR8lx82027oWszsA/edit?usp=sharing Terms of Service: https://docs.google.com/document/d/1MAY_7_uIVMnf4QYSpeaaSaSV7cm3-TJApqYVLfTHQ7w/edit?usp=sharing

Ratings & Reviews

4.5

out of 5

36 Ratings

Pro grade ductulator
Apr 12
Oliver2716
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.
Pro grade ductulator
Apr 12
Oliver2716

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.
Duct Calculator
Jan 30
doxhp
easy app to read duct sizing

Developer Response
Thank you for your positive feedback! It means a lot to us. We designed the app to be as simple and practical as possible for everyday use. We hope it continues to serve you well on the job!
Duct Calculator
Jan 30
doxhp

easy app to read duct sizing
Developer Response Mar 24
Thank you for your positive feedback! It means a lot to us. We designed the app to be as simple and practical as possible for everyday use. We hope it continues to serve you well on the job!
Another deceptive application
Mar 19
NYC_arch
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.

Developer Response
Thank you for your feedback. Our pricing is clearly displayed before any purchase is made — you are never charged without seeing the cost first. The 7-day free trial allows you to explore the app with no commitment. We're sorry the app wasn't the right fit for you, but we do not hide any fees.
Another deceptive application
Mar 19
NYC_arch

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.
Developer Response Mar 24
Thank you for your feedback. Our pricing is clearly displayed before any purchase is made — you are never charged without seeing the cost first. The 7-day free trial allows you to explore the app with no commitment. We're sorry the app wasn't the right fit for you, but we do not hide any fees.
greattttt for hvac
2d ago
veyselguven
the best app ever for hvac duct design
greattttt for hvac
2d ago
veyselguven

the best app ever for hvac duct design

Our biggest accuracy upgrade yet is here. Ductulator now delivers professional-grade duct sizing and psychrometric results built for real HVAC work. NEW • Mixed Air calculator: combine outdoor and return air, adjust the ratio, and instantly see dry bulb, RH, wet bulb, dew point, enthalpy, moisture, and condensation risk. MAJOR IMPROVEMENTS • Recalibrated round, rectangular, and flexible duct calculations for more dependable pressure-loss results. • Smarter size recommendations with improved friction, velocity, fitting-loss, and flex-compression calculations. • More reliable psychrometrics below freezing and at extremely low humidity. • Clearer result cards, consistent forward and reverse sizing, smoother onboarding, haptic feedback, and a refined launch experience. • Every core calculation has been thoroughly reviewed and reinforced with expanded automated testing. This is Ductulator’s most accurate and polished release yet.

Version 1.0.1 Aug 24

Data Not Linked to You

The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

Information

Seller: Mikhail Nikitin
Size: 44.1 MB
Category: Utilities
Compatibility: Requires iOS 17.0 or later.

iPhone
Requires iOS 17.0 or later.

iPad
Requires iPadOS 17.0 or later.

Apple Vision
Requires visionOS 1.0 or later.
Languages: English
Age Rating: 4+

4+

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In-App Purchases: Yes

premium $29.99

premium $4.99

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