Load calcs, charge, flue sizing, wire size and more — plus a scanner that decodes any equipment data tag. Everything a tech reaches for on the job, in one app.
Every tool opens to a job, saves its work, and exports a clean report for your customer.
HVAC
Calculators
SEER Savings Calculator
Repair vs. Replace
Load Calculation
Critical Readings
Charge Calculator
Flue Sizing
Nitrogen Test Compensator
References
Refrigerant Guide
SEER / SEER2 Reference
Equipment Life Span
Staging Types Explained
Refrigerant Pressure Chart
Refrigerant Charge Sheet
Static Pressure Test Sheet
Maintenance Checklist
Electrical
Calculators
Wire Size Calculator
Voltage Imbalance
Ohm's Law
References
Wire Gauge & Ampacity
Breaker Sizing Guide
Voltage Reference
Dangerous Panel Guide
Load Calculation Sheet
Plumbing
Pipe Sizing Reference
Water Heater Guide
GPM / Flow Rate
Water Pressure Reference
Drain Sizing Reference
Plumbing Service Report
General
Loan Calculator
Unit Converter
Service Call Report
Data-tag scanner
Scan a tag with the camera, upload a photo, or type it in
Brand, model, serial, age, refrigerant and electrical specs
Service-manual links for every unit
Save scans to a job alongside your calculations
Jobs & reports
Create a job and keep every calculation and scan together
Export and share a report for each tool
Scan photos stay on your device; decoded data, jobs and results sync across your devices when you sign in
Calculators provide estimates and reference tables are published references. Code compliance and final equipment sizing remain the technician's responsibility.
SEE IT IN ACTION
Built for the truck, not the desk
Big tap targets, fast results, and light and dark themes for any job site.
PRICING
Simple, honest pricing
Every tool is free. Go Pro to remove ads and put your business on your reports.
FREE
FieldTag
The full toolkit, supported by ads
✓ All calculators and field-guide references
✓ Data-tag scanner (camera, upload, manual) — 50 scans a day
✓ Jobs that keep your calculations and scans together
✓ Export and share every report
PRO
FieldTag Pro
For pros who hand reports to customers
✓ Everything in Free
✓ No ads — ever
✓ Your company name, phone and license number on every report
✓ Same 50 scans a day as Free
WHO IT'S FOR
Built for the field
If you size it, charge it, wire it or pipe it for a living, FieldTag is in your corner.