Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.




61+ iOS apps curated and reviewed
Finding the right ductalator apps can be overwhelming with so many options. We've analyzed 61+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | Yes | May 2026 | ||
| 2 | $3.99 | 4.7★ (317) | No | No | Sep 2026 | ||
| 3 | Free | 5.0★ (1) | No | No | May 2026 | ||
| 4 | $3.99 | 4.8★ (6) | No | No | Aug 2026 | ||
| 5 | $3.99 | 3.9★ (9) | No | No | Sep 2026 | ||
| 6 | Free | 4.6★ (11) | Yes | No | Jul 2026 | ||
| 7 | Free | 1.9★ (20) | No | Yes | May 2026 | ||
| 8 | Free | 5.0★ (1) | No | No | May 2026 |








Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.






This tool simplifies HVAC duct sizing for professionals. It quickly calculates dimensions for rectangular, round, and oval ducts based on airflow, friction loss, and velocity, ensuring optimal ventilation system performance.