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Diagnostic Calculators

HelpBro Diagnostic Calculators

Quick-reference calculators designed for HVAC and electrical technicians to estimate capacities, calculate loading constraints, and verify system metrics.

Looking for Interactive Simulators?

Analyze circuit wave graphics, simulate OP-AMP configurations, identify PCB copper trace details, and generate professional PDF invoices.

Open Engineering Tools
BTU / Thermal

BTU to Ton

Convert cooling capacity (BTU/hr) to standard refrigeration tons instantly.

BTU / Thermal

Ton to BTU

Convert AC tonnage rating to standard thermal capacity (BTU/hr) rating.

Electrical

Electricity Cost

Estimate appliance power consumption and monthly tariff bills with common presets.

BTU / Thermal

Room BTU Calc

Sizing calculator using dimensions, sun exposure, occupants, and kitchen status.

Electrical

Voltage Drop

Calculate wire voltage loss over distance for copper & aluminum branch conductors.

Electrical

Capacitor Size

Sizing runs by motor HP, or diagnose active microfarads with clamp meter values.

Electrical

Current Calc

Calculate operating current (Amps) for single/three-phase loads and breaker sizes.

System

Gas Pressure

Refrigerant P-T Saturation calculator (R-410A, R-22, R-134a, R-404A, R-290).