FieldCalc

Every daily HVAC calculation in one fast, offline app. PT chart, superheat, subcooling, duct sizing, and sensible load — with instant gauge readouts. No subscription.

FieldCalc is the only calculator an HVAC/R technician needs on a service call. Every daily calculation in one fast, modern, fully offline app — no subscription, no clutter.

CALCULATIONS

• PT Chart — saturation pressure and temperature for R-410A, R-32, R-22, R-134a, and R-407C, with instant analog gauge readout
• Superheat — suction line superheat with flooding warnings
• Subcooling — liquid line subcooling with flash gas warnings
• Duct Sizer — equal-friction round and rectangular duct sizing (ACCA Manual D / ASHRAE), with velocity limit warnings
• Delta-T / Sensible Load — sensible BTU/hr and required airflow, with tonnage and metric conversions

WHY FIELDCALC

• Works 100% offline — no signal needed on the roof or in the basement
• Imperial and metric units on every screen
• Modern, high-contrast interface built for the field
• Fast — open, calculate, done
• No account, no subscription

Built on trusted engineering sources: CoolProp thermodynamic data, ACCA Manual D, and ASHRAE Fundamentals.

FieldCalc is a reference tool for qualified HVAC/R professionals. Always verify results against equipment manufacturer specifications and applicable codes.