# AC Calculator - HVAC Sizing — Air conditioner or Heat Pump > HVAC sizing calculator for BTU/h, equipment recommendations, and energy comparisons. (iPhone/iPad app by Melchisedec Martinez Rodriguez.) - Source: https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761 (this page in markdown: same URL + `.md`) - Developer: [Melchisedec Martinez Rodriguez](https://appshunter.io/developer/1534398511) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 4.80/5 from 20 App Store ratings - Age rating: 4+ - Requires: iOS 18.6 · 9 MB - Languages: English, Spanish - Released: 2020-10-24 - Data updated: 2026-06-03 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761/reviews.md ## What is AC Calculator? AC Calculator makes HVAC sizing simple. Quickly calculate BTU/h capacity, get recommended equipment types, convert between BTU, kW, Kcal and Tons, check up-to-date price estimates, and compare inverter vs. conventional energy consumption. Unlock professional-grade features anytime with in-app purchases. ## Key features - Calculate BTU/h capacity - Recommend equipment types - Convert BTU, kW, Kcal, Tons - Check price estimates - Compare inverter vs. conventional ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Unlock View details | $1.99 | one-time | | Unlock Advanced mode | $3.99 | one-time | ## Frequently asked questions about AC Calculator ### What is AC Calculator Lite used for? AC Calculator Lite is a utility app designed to simplify HVAC sizing. It helps users calculate BTU/h capacity, get equipment recommendations, and compare energy consumption. ### Does AC Calculator Lite have ads? No, AC Calculator Lite does not contain advertisements. The app is free to download and use, with optional in-app purchases for advanced features. ### What devices is AC Calculator Lite compatible with? AC Calculator Lite is available for iPhone and iPad devices, running on iOS. ### How often is AC Calculator Lite updated? The latest version, 5.2, was released on November 16, 2025. Updates are provided by the developer to ensure the app remains current and functional. ### What is the age rating for AC Calculator Lite? AC Calculator Lite has an age rating of 4+, making it suitable for a wide range of users. ### Can I unlock more features in AC Calculator Lite? Yes, professional-grade features can be unlocked in AC Calculator Lite through in-app purchases. This allows users to access advanced functionalities as needed. ### What kind of calculations can AC Calculator Lite perform? AC Calculator Lite can calculate BTU/h capacity, convert units between BTU, kW, Kcal, and Tons, and compare energy consumption between inverter and conventional systems. ### What do users think of AC Calculator Lite? Users generally have a very positive opinion of AC Calculator Lite, as indicated by its high rating of 4.8 stars from 20 ratings. ## Version history (last 5 releases) ### 5.3 — 2026-04-23 Bug fixes ### 5.2 — 2025-11-16 Bug fixed for regions where the decimal separator uses a comma instead of a dot. Additionally, an alert is now displayed when a required value is left blank. ### 5.1 — 2025-11-15 The reset button no longer erases previous user data that prevented quick recalculation in Advanced Mode. ### 5.0 — 2025-10-05 What’s New in This Version? Redesigned interface for a cleaner and more modern experience. Advanced adjustments for improved calculation accuracy and recommendations. Bug fixes and performance improvements for a smoother experience. ### 4 — 2021-09-07 Added Height of place in basic mode. ## Apps similar to AC Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Solar Calculator The Original](https://appshunter.io/ios/app/solar-calculator-the-original/id1307247788) | 3.7 (6) | Free | Utilities | | [HVAC Duct Sizer](https://appshunter.io/ios/app/hvac-duct-sizer/id317970395) | 2.9 (8) | $5.99 | Utilities | | [Duct Calculator S&P](https://appshunter.io/ios/app/duct-calculator-s-and-p/id1096043356) | 5.0 (1) | Free | Utilities | | [Blue Cold Heat Load Calculator](https://appshunter.io/ios/app/blue-cold-heat-load-calculator/id6590624925) | 5.0 (1) | Free | Utilities | | [Código Diagnóstico Mirage](https://appshunter.io/ios/app/codigo-diagnostico-mirage/id1048228632) | 4.0 (1) | Free | Utilities | | [IN HVAC Calculator](https://appshunter.io/ios/app/in-hvac-calculator/id1219008229) | 4.2 (11) | Free | Utilities | ## More apps by Melchisedec Martinez Rodriguez - [AC Calculator Pro](https://appshunter.io/ios/app/ac-calculator-pro/id1534398509) - [Compressor HP](https://appshunter.io/ios/app/compressor-hp/id1539320947) - [Compressor HP Pro](https://appshunter.io/ios/app/compressor-hp-pro/id1539342547) - [AWG Calculator: Wire Size](https://appshunter.io/ios/app/awg-calculator-wire-size/id1607173204) - [Pricery: Receipts and expenses](https://appshunter.io/ios/app/pricery-receipts-and-expenses/id6759989944) All apps by Melchisedec Martinez Rodriguez: https://appshunter.io/developer/1534398511 ## Related topics [melchisedec martinez rodriguez](https://appshunter.io/ios/topics/melchisedec-martinez-rodriguez) · [hvac load calculator manual j](https://appshunter.io/ios/topics/hvac-load-calculator-manual-j) · [btu calculator](https://appshunter.io/ios/topics/btu-calculator) · [btu](https://appshunter.io/ios/topics/btu) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-03.*