HVAC Calculator: BTU & AC Load
Vyacheslav Dovner Utilities iPhoneiPadiPod touch
HVAC Calculator: BTU & AC Load is a free Utilities app for iPhone and iPad by Vyacheslav Dovner. Requires iOS 17.0. Updated August 26, 2026.
- Price
- Free
- on the App Store
- Size
- 7 MB
- Age 4+
- Updated
- Aug 26
- 2026 · v1.1
Screenshots
About HVAC Calculator: BTU & AC Load
Size any system in seconds. HVAC Calculator gives technicians, installers, and DIY homeowners fast, accurate BTU and load numbers — no spreadsheets, no guesswork. WHAT YOU CAN CALCULATE • BTU & Cooling Load — find the right AC size for any room by square footage, climate, and sun exposure • Ductulator — duct sizing by friction rate, velocity, and CFM • Tonnage Converter — instant BTU ⇄ ton conversions • Room & Area — square footage and volume in metric or imperial BUILT FOR THE FIELD • Works offline — no signal needed on the job site • Metric and imperial units • Clean, fast interface designed for gloved hands • Save and share your results • Formulas based on current HVAC industry standards TRUSTED BY HVAC PROS From apprentices studying for the EPA 608 to seasoned installers, HVAC Calculator replaces bulky charts and slide rules with one tool in your pocket. Download HVAC Calculator free and size your next job right the first time.
What’s new
Version 1.1 · Updated August 26, 2026
Two new calculators — and a faster way to reach all of them. DUCT SIZE CALCULATOR Size round and rectangular duct by the equal-friction method. Enter airflow in CFM or m³/h, choose a friction rate, and get the exact diameter, the nearest standard duct size, and an air velocity check that warns you before a run turns noisy. Rectangular ducts show width × height plus the equivalent round diameter. HEAT LOAD CALCULATOR Estimate the cooling load room by room for a whole property. Add each room with its dimensions, sun exposure, occupants and kitchen, then read the total in BTU/h, tons and kW with a per-room breakdown — a quick first pass before a full Manual J. FAN TO DUCT IN ONE TAP Work out exhaust airflow, then send that CFM straight into the duct sizer without typing it again. NEW CALCULATORS SCREEN Air conditioning, exhaust fan, duct size and heat load now sit together on one screen instead of separate tabs. ALSO IN THIS UPDATE • Saved projects now hold duct and heat load calculations too • Both new calculators translated into all 20 supported languages Every calculation still runs offline, in metric or imperial.
App privacy
The developer, Vyacheslav Dovner, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Performance Data
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Performance Data, Crash Data
Used for: Third-Party Advertising, Analytics, App Functionality
Alternatives to HVAC Calculator: BTU & AC Load
Looking for apps like HVAC Calculator: BTU & AC Load? Here are 6 similar apps on the App Store. The highest rated is BaseCalc HVAC Calculator (5.0/5), and all 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| HVAC Calculator: BTU & AC Load | – | Free | August 26, 2026 | |
| HVAC Calculator - FieldCalc | – | Free | Oct 18, 2026 | Compare |
| Clima Calculator: Frigorías | – | Free | Oct 11, 2026 | Compare |
| BaseCalc HVAC Calculator | 5.0 / 5 (1) | Free | Oct 23, 2026 | Compare |
| BTU Calculator: AC & HVAC | 5.0 / 5 (3) | Free | Mar 14, 2026 | Compare |
| HVAC Duct Calculator | – | Free | Jun 24, 2026 | Compare |
| HVAC Pro Calculator: NEC + P-T | 5.0 / 5 (1) | Free | Oct 25, 2026 | Compare |