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.
BTU to Ton
Convert cooling capacity (BTU/hr) to standard refrigeration tons instantly.
Ton to BTU
Convert AC tonnage rating to standard thermal capacity (BTU/hr) rating.
Electricity Cost
Estimate appliance power consumption and monthly tariff bills with common presets.
Room BTU Calc
Sizing calculator using dimensions, sun exposure, occupants, and kitchen status.
Voltage Drop
Calculate wire voltage loss over distance for copper & aluminum branch conductors.
Capacitor Size
Sizing runs by motor HP, or diagnose active microfarads with clamp meter values.
Current Calc
Calculate operating current (Amps) for single/three-phase loads and breaker sizes.
Gas Pressure
Refrigerant P-T Saturation calculator (R-410A, R-22, R-134a, R-404A, R-290).