# Ductulator - Duct Calculator

> HVAC Airflow Sizing & Design

Canonical page: [https://chrome-stats.com/d/id6757307937](https://chrome-stats.com/d/id6757307937)

## Overview

- **ID:** `id6757307937`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Mikhail Nikitin
- **Category:** Utilities
- **Rating:** 4.60 / 5 (32 ratings)
- **Version:** 1.0.1
- **Last updated:** 2026-08-24
- **First published:** 2026-01-07
- **Size:** 42 MB
- **Data as of:** 2026-09-05
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/ductulator-duct-calculator/id6757307937)
- **Privacy policy:** [https://docs.google.com/document/d/1r9oCuYYtQZlKWhZTlrP8Ck73V6NoR8lx82027oWszsA/edit?tab=t.0](https://docs.google.com/document/d/1r9oCuYYtQZlKWhZTlrP8Ck73V6NoR8lx82027oWszsA/edit?tab=t.0)

## 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: 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

## Rankings

- #206,902 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6757307937)