Best BTU Calculator alternatives: apps like BTU Calculator - Data Centers

10+ similar apps compared and reviewed

4.5 avg rating
10 free apps
Updated October 2026

Looking for something like BTU Calculator? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to BTU Calculator

More apps like BTU Calculator

4
Bluon HVAC
Bluon HVAC
Bluon HVAC
HVAC Tools
Free

Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.

500,000+ HVAC unit databaseManuals and part listsAI troubleshooting tool (MasterMechanic)
🔧 Utilities
(4.5K)
ad-supported
5
Cr Calc – Cold Room Calculator
Cr Calc – Cold Room Calculator
Cr Calc – Cold Room Calculator
by Anatoliy Gershman
Free

This app assists in calculating heat gain for cold rooms, supporting various heat sources and construction materials. It offers project organization and in-app help, with an optional subscription for PDF export.

On-the-fly calculationsMultiple heat gain typesExtensive material selection
🔧 Utilities
(2)
freemium
6
Digiduct
Digiduct
Digiduct
Duct-Sizing App
Free

This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.

Duct sizing for rectangular, round, and flat oval ductsCustomizable dimensions with locked valuesDuct location intelligence for context-aware sizing
🔧 Utilities
(11)
ad-supported
7
Allday HVAC Calc
Allday HVAC Calc
Allday HVAC Calc
Pipe and Duct calculations
Free

This app offers three specialized modules for HVAC engineers: a psychrometric calculator for air properties, a pipe calculator for fluid dynamics and selection, and a duct calculator for air speed and pressure loss. It provides detailed calculations and reference formulas in both SI and IP units.

Psychrometric air property calculationsPipe velocity and pressure loss calculationDuct speed and pressure loss calculation
🔧 Utilities
(1)
free
8
Installer App
Installer App
Installer App
Essential HVAC tools
Free

This app provides HVAC professionals with a digital toolbox for everyday tasks. It offers product information, installation guides, and advanced features to streamline work, including project management and hydronic balancing tools.

Radiator PresettingProduct FinderMy Projects (Cloud-based)
🔧 Utilities
(7)
free
9
HVAC Load Calculator Manual J
HVAC Load Calculator Manual J
HVAC Load Calculator Manual J
BTU Sizing for Contractors
Free

This app provides professional HVAC load calculations for contractors, offering three levels of accuracy from quick estimates to detailed Manual J calculations. It's designed for field use with an intuitive interface, offline capabilities, and professional report generation.

Multiple accuracy levels (Simple, Moderate, Pro)Offline-ready calculationsProfessional PDF report generation
🔧 Utilities
(41)
free with in-app purchases
10
Daikin Service
Daikin Service
Daikin Service
by Daikin Airconditioning UK Ltd
Free

This app assists service engineers in the air conditioning industry with Daikin VRV, Altherma, Split, and Sky Air equipment. It provides tools for fault finding, including fault codes, refrigerant calculations, and diagnostic checks. The application also supports outdoor unit settings and operational procedures.

Fault code lookupAdditional charge calculationsPCB dip switch settings
🔧 Utilities
(11)
free