Ductulator vs Duct Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ductulator
This app provides a simple and efficient tool for calculating the dimensions of square ventilation ducts. It's designed for engineers, architects, and contractors to generate data for mechanical ventilation, cooling, and HVAC projects. Quickly validate residential and commercial solutions with this easy-to-use calculator.
- Calculate equivalent round diameter of square ducts
- Convert square duct dimensions by volume ratio
- Provide metric equivalence
- Validate residential and commercial solutions
- Designed for engineers and architects
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Offrez-vous un outil de calcul simple et efficace pour calculer les dimensions de conduit de ventilation carré ! Destinée aux ingénieurs, aux architectes, aux entrepreneurs et à leurs équipes d’experts, notre application unique est un incontournable sur le chantier. Fonctionnel en tout temps, notre instrument de travail génère les données dont vous avez besoin pour réaliser vos projets de ventilation mécanique, d’aération du ventilateur de refroidissement, de conception générale pour les conduits de climatisation et de chauffage. Facile d’utilisation et optimisé pour tous les types d’éclairage ou d’écrans, notre Ductulator réinventé vous permettra de valider rapidement vos solutions résidentielles et commerciales. Offrez-vous aujourd’hui notre calculatrice conçue spécialement pour: -Calculer l'équivalent en rond (Diamètre) d'un conduit carré de ventilation -Convertir des dimensions de conduit carré par un rapport de volume d'une nouvelle dimension, amincie selon un ratio spécifique. -Donner l’équivalence métrique Parce que mesurer et valider vos calculs font partie du métier, le nôtre est de vous offrir ce qu’il y a de meilleur sur le marché! Faites le calcul!
Duct Calculator
This professional HVAC utility assists engineers and technicians with precise duct sizing and airflow calculations for ventilation systems. It simplifies essential calculations for both design and installation work, improving on-site efficiency.
- Calculate duct sizes using airflow (CFM) and velocity (FPM)
- Supports rectangular and round duct sizing in inches
- Determine air flow rate in CFM
- Calculate air velocity in FPM
- Simple interface for fast on-site calculations
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Duct Calculator is a focused duct sizing tool for HVAC engineers, designers and installation technicians. Enter what you know and get the duct dimensions, airflow or air velocity you need, without a chart or a slide rule. CALCULATIONS - Duct size: find the required duct dimensions from airflow (CFM) and air velocity (FPM). - Airflow: determine the airflow rate in CFM. - Air velocity: determine velocity in FPM to help verify system performance. DUCT SHAPES - Round ducts - Rectangular ducts - Results shown in inches WHO IT IS FOR - HVAC engineers and designers checking a duct size during design work. - Installation technicians and contractors who need a quick answer on site. - Students learning how airflow, velocity and duct size relate. WHERE IT HELPS - Sizing a new supply or return run from a known CFM. - Checking whether an existing duct keeps velocity within your target. - Comparing a round duct with a rectangular one when space is tight. SIMPLE BY DESIGN A clean interface with only the inputs you need, so you get an answer quickly on the job. Duct Calculator is free to use. An optional one-time upgrade removes ads. Results are intended as a calculation aid. Always confirm designs against applicable codes and project requirements. Download Duct Calculator and size your next duct run. Privacy Policy : https://semiconhub.in/manager/privacy.html Terms and Condition : https://semiconhub.in/manager/tcondition.html
Screenshots
Verdict
The clearest difference is rating: Duct Calculator at 4.7 against Ductulator's 1.0. Ductulator's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 10 months). On price, ratings volume, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Duct Calculator sells 1 one-off in-app purchase. Ductulator asks for nothing beyond the download.
Duct Calculator holds the better App Store score, 4.7 against 1.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
Ductulator ships an update weekly, Duct Calculator every 10 months. Both last shipped on October 12, 2026.
| Parameter | Ductulator | Duct Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) | 4.7 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 | 3 — better |
| Update frequency | Weekly — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 14 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Simon Leroux | Sachinbhai Surani |
Customer experience
Ductulator
Duct Calculator
In-app purchases
Ductulator
No in-app purchases
Duct Calculator
- Lifetime premium$9.99
Questions
Is Ductulator free?
Is Duct Calculator free?
Which has better reviews, Ductulator or Duct Calculator?
Do Ductulator or Duct Calculator have ads?
Which is updated more often, Ductulator or Duct Calculator?
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