Field-first HVAC calculators β€’ fast + OEM-honest

Field-first
HVAC Calculator Toolkit

Fast HVAC field calculators with clear units and copyable summaries.


100+
Refrigerants (PT data)
OEM-honest
Guidance (no false certainty)
Tech-first
Built for the field

Built for the Field,
Designed for Trust

Fast inputs, clear units, copyable summaries, and guidance that keeps OEM procedures first.

Fast on mobile

Calculator pages are designed for quick entry with consistent input patterns and explicit units.

Copy-ready summaries

Each calculator provides a copyable summary for job notes without forcing sign-in.

OEM-first guidance

Recommendations avoid false certainty. Results should be compared to manufacturer procedures and verified conditions.

Sign-in optional

Use calculators anonymously. Sign-in is planned for saving history and team workflows (Clerk + Convex).

PT data foundation

PT datasets are planned as versioned resources for deterministic lookups and reproducible results.

Team-ready architecture

Tier gating and Team seat limits are planned with server-side enforcement (Team default: 3 active seats).

Start with the essentials

Jump straight into the most-used field calculations. Each tool includes validation, clear units, and a copyable summary.

  • Superheat & Subcooling
  • Airflow / CFM
  • Duct sizing (round)
  • Additional charge estimate
Safety note: calculators provide guidance and estimates. Always follow OEM procedures, local codes, and safe work practices.
Quick links
v1
Open calculators
/calculators
PT Chart
/pt-chart
Pricing
/pricing
Tip
Copy summaries into job notes
Sign-in is optional (saving planned)
βœ“ Built for repeat field use