Cooling Load Estimator
Estimate cooling load, equipment tonnage, ventilation impact, and safety margin.
Open ToolAll MEP Calculators and Engineering Tools
Browse 40 active MEP calculators across HVAC, fire fighting, electrical power, fire alarm, ELV, plumbing, drainage, pumps, tanks, cables, unit conversion, and reports.
Fast tool discovery
Use this page as a complete calculator index. Each tool includes sample data, calculation results, warnings, methodology notes, and PDF report download where applicable.
Common standards covered
Selected calculators include planning profiles for NEC, IEC, BS 7671, ASHRAE, NFPA, IPC, GCC, and Civil Defense style assumptions. Profiles are simplified planning aids, not final code compliance engines.
Mechanical HVAC Tools
Duct Sizing & Velocity Checker
Check duct velocity, equivalent diameter, airflow density, and noise-risk level.
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Airflow & CFM Calculator
Compare airflow by ACH, occupancy, cooling tons, and design margin.
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Chilled Water Pipe Sizing Tool
Calculate chilled water flow, pipe velocity, and pressure-loss warning.
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Exhaust Fan Sizing Calculator
Estimate exhaust fan capacity from room volume, ACH, equipment count, and margin.
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TR to CFM Calculator
Convert cooling tons to supply airflow using CFM per ton, ventilation, and margin.
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kW to BTU Calculator
Convert kW to BTU/h, refrigeration tons, kcal/h, and equivalent cooling capacity.
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Kitchen Hood CFM Calculator
Estimate kitchen exhaust hood airflow from hood size, capture velocity, exposure, and margin.
Open ToolFire Fighting Tools
Sprinkler Density & Coverage Planner
Estimate sprinkler count, design flow, coverage, and water demand.
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Fire Pump Sizing Calculator
Estimate fire pump flow, head, jockey pump range, and pressure margin.
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Fire Hose Reel / Hydrant Demand Tool
Calculate simultaneous hose reel and hydrant flow with duration and water volume.
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Fire Water Tank Capacity Calculator
Estimate gross tank size from fire demand, duration, usable volume, and refill allowance.
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FM200 / Clean Agent Quantity Estimator
Estimate clean agent quantity, cylinder count, and room-volume sensitivity.
Open ToolElectrical Power Tools
Cable Sizing & Voltage Drop Planner
Check current, selected cable ampacity, voltage drop, and minimum cable guidance.
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Electrical Load Schedule Builder
Build connected load, demand load, kVA, spare capacity, and panel-size guidance.
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Transformer Sizing & Spare Capacity Calculator
Calculate required transformer kVA, standard size, loading percentage, and spare margin.
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Generator Sizing & Starting Load Planner
Estimate generator kVA using running load, starting load, diversity, and spare margin.
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Power Factor Correction & Payback Calculator
Calculate capacitor kVAR, current reduction, transformer relief, and simple payback.
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Conduit Fill Calculator
Calculate conduit fill percentage for cable and raceway planning.
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Short Circuit Current Calculator
Estimate transformer secondary fault current for breaker duty checks.
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Lighting Lux Calculator
Estimate required lumens and luminaire count from lux target and area.
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Breaker Size Calculator
Estimate breaker rating from load current, voltage, phase, and safety margin.
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kVA to Amps Calculator
Convert kVA to amps for single-phase and three-phase electrical loads.
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Ampacity Derating Calculator
Estimate derated cable ampacity from temperature, grouping, and installation factors.
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MEP Unit Converter
Convert common MEP units for airflow, water flow, pressure, power, cooling, and temperature.
Open ToolFire Alarm Tools
Fire Alarm Battery Backup Calculator
Calculate standby Ah, alarm Ah, derating, spare margin, and recommended battery size.
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Fire Alarm Loop Load Calculator
Check device count, loop current, capacity usage, address usage, and spare margin.
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Fire Alarm DIP Switch Calculator
Interactive DIP switch addressing for ZETA, Notifier, and Simplex-style fire alarm devices.
Open ToolELV Tools
CCTV Storage Calculator
Calculate CCTV retention storage by camera count, bitrate, recording hours, RAID, and spare.
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Data Rack Power & UPS Calculator
Estimate rack load, UPS kVA, heat output, and battery energy requirement.
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Access Control Door Hardware Planner
Build controller, reader, lock, REX, contact, PSU, and battery quantities.
Open ToolPlumbing & Drainage Tools
Water Demand Calculator
Estimate daily demand, peak demand, diversity effect, and storage requirement.
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Pump Head Calculator
Calculate static head, pressure head, friction loss, velocity, and total dynamic head.
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Drainage Pipe Sizing Assistant
Estimate drainage fixture units, pipe size guidance, and slope warning.
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Water Tank Capacity Planner
Calculate domestic tank volume, fire reserve separation, usable volume, and refill rate.
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Hot Water Demand Calculator
Estimate hot water storage, heating energy, recovery rate, and heater capacity.
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Water Pipe Pressure Drop Calculator
Estimate water pipe velocity, friction head, and pressure drop.
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Drainage Slope Calculator
Calculate pipe fall, slope percentage, and invert level difference.
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Pump Horsepower Calculator
Estimate pump power from flow, total dynamic head, efficiency, and motor margin.
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Water Pump NPSH Calculator
Calculate available NPSH, compare against pump NPSHr, and check cavitation margin.
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