Duct Calculator - DuctCalc Apple

Duct Calculator - DuctCalc

HVAC Sizing & Psychrometric

Features & Capabilities

The only app combining professional duct sizing with psychrometric calculations. ASHRAE-compliant formulas. Imperial & Metric units. Used by HVAC engineers worldwide.

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

User Growth & Download Statistics

App
By:
Mikhail Nikitin
Rating:
4.40
(20)
1 new ratings
Version:
1.0 Last updated: 2026-01-08
Version code:
881161559
Creation date:
2026-01-07
Compatible devices:
Size:
47.72MB
URLs:
Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-12
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
Mikhail Nikitin
Apple Apps Store
https://apps.apple.com/us/app/duct-calculator-ductcalc/id6757307937

User Reviews

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.
by Ol*****, 2026-04-12

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.
by NY*****, 2026-03-19

easy app to read duct sizing
by do*****, 2026-01-30
View all user reviews ›

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