Ductulator - HVAC Duct Sizing

1.5

welmurr

4.41

314 reviews

5,000+
Downloads

$2.99

Duct Size Calculator for HVAC Design Engineers

Ductulator - HVAC Duct Sizing Screenshot 1 of 5

Ductulator - HVAC Duct Sizing Screenshot 2 of 5

Ductulator - HVAC Duct Sizing Screenshot 3 of 5

Ductulator - HVAC Duct Sizing Screenshot 4 of 5

Ductulator - HVAC Duct Sizing Screenshot 5 of 5

4.41 · 314 reviews · 5,000+ downloads · #11 in Productivity

About Ductulator - HVAC Duct Sizing

Ductulator - HVAC Duct Sizing is a productivity app developed by welmurr.

Download Statistics

Ductulator - HVAC Duct Sizing has been downloaded 6.6 thousand times. In the last 30 days, the app was downloaded 130 times. It is ranked in the top 100 productivity apps.

User Ratings

Ductulator - HVAC Duct Sizing is rated 4.41 out of 5 stars. The rating is based on 310 ratings.

App Information

Ductulator - HVAC Duct Sizing costs $2.99 to download. The APK download size is 1.57 MB. The latest version available is 1.5. The last update was on May 13, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play October 2022.

Description

The Duct Sizer App designed based on surveying the needs of engineers.
Units can be changed from Imperial to S.I

This is a much faster and versatile equivalent of the duct sizing charts provided by top HVAC manufacturers.

In Design Mode: Get a range of suitable duct sizes by inputting either the maximum friction rate or maximum velocity. The App will provide a list of suitable rectangular and circular ducts as well as resulting friction rates and velocities

In Sizing Mode: Just like a Ductulator, Adjust the duct dimensions and air flow rates, while checking the resulting friction rate and velocity which update automatically. The Sizing mode is typically used to analyze existing duct systems, and was added upon the request of users' feedback.

Calculations are based on standard air 0.075 lb/ft3 (1.2 kg/m3) in clean galvanized steel duct.

Any feedback is welcome, and will be the basis for future updates.

Show more Show less

More data about Ductulator - HVAC Duct Sizing

Price	$2.99
Total downloads	6.6 thousand
Recent downloads	130
Rating	4.41 based on 310 ratings
Ranking	Top ranked
Version	1.5
APK size	1.57 MB
Number of libraries	?
Suitable for	Everyone
Ads	NO ads

App Performance Report

Get a detailed PDF report for Ductulator - HVAC Duct Sizing with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

Get PDF Report — $29

Alternative downloads for the Ductulator - HVAC Duct Sizing app

Ductulator - HVAC Duct Sizing compared with similar apps

Common keywords of similar apps

Mode Ductulator Engineers Suitable Maximum Rate Resulting Rates Feedback Duct Sizing Hvac Friction Design App Based Velocity Air

Keywords missing from this app

Calculator Calculations Offset Test Pressure Rectangular Bend Size Equipment Round Recent Angle Layout Diameter Users Sheet Metal Calculate Ductwork Standard Industry Drop Time Application Cable Practice Ashrae Pipe Exam Manual Sizes System Field Added Designed Functions Inspector Conditioning Number Tools Flow

Google Play Rating history and histogram

Rating history

Subscribe to see the full rating timeline

240

Downloads over time

Subscribe to see download velocity and history

Ductulator - HVAC Duct Sizing has been downloaded 6.6 thousand times. Over the past 30 days, it has been downloaded 130 times.

Changelog of Ductulator - HVAC Duct Sizing

Show changelog

Developer information for welmurr

welmurr

welmurr@gmail.com

Legal name:

Address:

Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.

I'm the developer of this app

Comments on Ductulator - HVAC Duct Sizing for Android

★★★★☆ Vaibhav Savani · Oct 18, 2024

Useful App for Immediate tentative Duct sizing on sites.

★★★★★ Richard G Wallen · Apr 17, 2026

Better than my Trane ductulator - I used this for a year on the iPhone. I've since traded that in for a Samsung so bought it again. The features are a little different. One thing I miss is to be able to "size" vs design by switching from flex to rectangular or square duct. I use this to cross-check my Manual D where I can see the friction loss across distribution boxes and triangles. Are you considering a PC version?

★☆☆☆☆ Aaron Wicklund · Nov 16, 2025

If you can't use the full functions of an actual ductulator what is the point? I want my money back!!!!!

★☆☆☆☆ Jason Towers · Jan 5, 2024

Pretty much worthless. Can't enter dimensions without a CFM measurement. Measuring the duct for system replacement (usually inoperable) I want to know what it can handle at WC

★★☆☆☆ ENGIN333R · May 13, 2023

Disappointed, I was expecting it to be more flexible with the Units, but I was stuck with m3/hr, an I need to use L/s, so if I'm going to use this app I would have to do so many units conversion for a ducting design of a building.

★☆☆☆☆ Kerry Nardi · Jul 25, 2024

Completely unnecessary. A shame that we value using our brains so little that we wish to open source a skilled trade that requires training and field experience to understand. Every certified trade can do the math in their head. Useless.

Google Play Rankings for Ductulator - HVAC Duct Sizing

Top rankings

Rank	Country	Category	List
11	United States	Productivity	Top Paid
165	United States	Overall	Top Paid
165	United States	Applications	Top Paid
42	Indonesia	Productivity	Top Paid
42	India	Productivity	Top Paid
42	Mexico	Productivity	Top Paid
42	Saudi Arabia	Productivity	Top Paid
42	Turkey	Productivity	Top Paid
43	Switzerland	Productivity	Top Paid
43	Czech Republic	Productivity	Top Paid

Show all market rankings

Ranking history in United States

Ranking history

Subscribe to see full ranking history in this country

AppBrain offers valuable information about your app and those of your competitors. Join AppBrain for free and claim this app to view more ranking data, view history etc.

I'm the developer of this app

Technologies used by Ductulator - HVAC Duct Sizing

2 permissions

Subscribe to see full permission and library details

Top new apps Today's trending apps Apps on sale Popular Productivity Apps Apps other people are watching

AppBrain is a directory focused on discovering great apps and games. We give statistics, rankings and search options that Google Play and the App Store don't have. All trademarks are owned by their respective owners. AppBrain doesn't offer APKs or binaries, and always lets users install the official version from Google Play or the App Store.

More apps

Ductulator - HVAC Duct Sizing

Duct Size Calculator for HVAC Design Engineers

About Ductulator - HVAC Duct Sizing

Download Statistics

User Ratings

App Information

Technical Requirements

More data about Ductulator - HVAC Duct Sizing

Alternative downloads for the Ductulator - HVAC Duct Sizing app

Ductulator - HVAC Duct Sizing compared with similar apps

Common keywords of similar apps

Keywords missing from this app

Google Play Rating history and histogram

Downloads over time

Changelog of Ductulator - HVAC Duct Sizing

Developer information for welmurr

Share Ductulator - HVAC Duct Sizing

Comments on Ductulator - HVAC Duct Sizing for Android

Google Play Rankings for Ductulator - HVAC Duct Sizing

Top rankings

Ranking history in United States

Technologies used by Ductulator - HVAC Duct Sizing