HVAC Airflow CFM Calculator

HVAC airflow CFM calculator. Temperature delta, velocity, sensible & total heat.

HVAC Airflow CFM Calculator is the essential field tool for HVAC technicians, engineers, and contractors calculating cubic feet per minute (CFM) airflow with four professional methods for cross-checking and verification. This air conditioning calculator eliminates guesswork in ductwork design and system diagnostics.

CALCULATION METHODS:
Temperature Delta Method — CFM from BTU load and supply/return temperature difference
Duct Velocity Method — CFM from duct size (round or rectangular) and air velocity (FPM)
Sensible Heat Method — CFM from sensible cooling/heating capacity and temperature delta
Total Heat Method — CFM from total heat load and enthalpy difference

CORE FEATURES:
Round & Rectangular Duct Support — Both duct shapes in velocity calculations
Cross-Check Verification — Use multiple CFM methods to validate calculations
Instant Results — Airflow, velocity, and duct area displayed in real-time
100% Offline Operation — No internet connection required for field calculations
English & Spanish Support — Bilingual interface for diverse crews

PROFESSIONAL TOOLS:
Save calculation history for project reference and review
PDF export for job reports and documentation
Dark theme for outdoor fieldwork visibility
Ad-free professional experience

WHY HVAC TECHNICIANS CHOOSE THIS APP:
Faster load calculations during service calls and installations
Accurate CFM verification for system balance and air quality
Quick cross-check methods prevent installation errors
Works offline on job sites without cellular coverage
Replaces bulky slide rules and reference charts

PERFECT FOR:
HVAC technicians on air conditioning service calls
HVAC field technicians performing system diagnostics
HVAC apprentices learning proper calculation methods
AC contractors bidding residential and commercial work
Building maintenance engineers commissioning systems
HVAC students preparing for EPA 608 certification

Part of HVACTools Suite — the professional HVAC technician app collection for field calculations and refrigeration diagnostics.