MEP Toolbox

Engineers House

About this app

MEP Toolbox is the ultimate engineering companion for MEP (Mechanical, Electrical, and Plumbing) professionals. Built by Engineers House, this all-in-one tool brings 31 unit converters, 25 engineering calculators, and 14 interactive reference tools to your phone.

UNIT CONVERTERS (31 categories) - Length, Area, Volume, Flow Rate, Pressure, Temperature, Power/Cooling, Energy, Velocity, Mass, Density, Electrical, Illuminance, Luminous Flux, Thermal Conductivity, Heat Transfer Coefficient, Dynamic & Kinematic Viscosity, Torque, Electrical Current, Voltage, Resistance, Rotational Speed, Specific Heat & Enthalpy, Thermal Resistance (R-value), Mass Flow Rate, Humidity Ratio, Acoustic/Sound, Fuel Consumption.

MEP CALCULATORS (25 tools)
HVAC: Cooling Load, Heating Load, Chiller Tonnage, Fan Laws, Duct Pressure Drop, Duct Sizer, ACH, Pump Head, Cooling Tower, Psychrometric, Duct Equivalent Diameter
Plumbing: Fixture Unit, Hot Water Demand, Drainage Pipe, Water Heater, Pipe Sizing, Pressure Drop
Electrical: Voltage Drop, Cable Sizing, Transformer, Lighting Power Density, Conduit Fill, Short Circuit, Electrical Load
Fire Protection: Sprinkler Hydraulic, Sprinkler Coverage

REFERENCE TOOLS (14 interactive) - Pipe Sizes (ASME B36.10M), Wire Ampacity (NEC 310.16), Insulation Selector, Motor FLA + NEMA Frame, Refrigerant P-T Properties, Copper Tube Selector, Steel Pipe Schedules, Duct Sizes & Weights, Circuit Breaker Sizing, ASHRAE Design Conditions (40 cities), NC Rating Calculator, Valve Cv/Kv Sizing, NFPA Sprinkler Design, Fitting Equivalent Length

KEY FEATURES
- SI and Imperial toggle on every input
- Command palette for quick search
- Clean, professional interface
- Works offline
- No ads, no tracking, no subscriptions

Built by Engineers House for MEP engineers, HVAC technicians, electrical designers, plumbing engineers, and engineering students.

What’s new

First public release of MEP Toolbox!

- 31 unit converters: length, area, volume, flow rate, pressure, temperature, power/cooling, energy and more
- 25 engineering calculators for HVAC, electrical, plumbing and structural work
- 14 reference tools and datasheets for MEP professionals
- Clean, intuitive interface built for engineering workflows
- Works fully offline with no data collection