Mechanical · Electrical · Plumbing
Engineering calculators anyone can use, built by people who size systems for a living.
Field-ready tools covering airflow, load, power and water. Type your inputs and get sized results instantly with a clean engineering workflow.
Mechanical
HVAC airflow, ductwork and load
Mechanical
Duct Sizing
Round & rectangular duct from airflow
Open →MechanicalCooling Load Estimator
Sensible load & tonnage for a space
Open →MechanicalAir Changes & Ventilation
CFM from ACH, or ACH from CFM
Open →MechanicalPsychrometric Chart
Interactive HVAC air-state chart with dry bulb, wet bulb, RH, humidity ratio and enthalpy lines.
OpenElectrical
Power, cabling and containment
Electrical
Voltage Drop
Conductor drop over run length
Open →ElectricalLoad & Cable Ampacity
Design current with derating factors
Open →ElectricalConduit Fill
Percentage fill and spare capacity
Open →ElectricalLift Traffic Analysis
Preliminary lift count, round trip time, handling capacity and connected electrical load.
Open