🌡️ HVAC & Refrigeration
Dew Point Calculator
Calculate dew point temperature from altitude, temperature, and humidity
Psychrometric Calculator
Calculate enthalpy, humidity ratio, and other air properties
Duct Velocity Calculator
Calculate air velocity in rectangular and round ducts
Cooling Load Estimator
Estimate building cooling load quickly
Pump Head Calculator
Calculate required pump head for HVAC systems
⚡ Electrical Engineering
Power Calculator
Calculate power, current, voltage from any two inputs
Voltage Drop Calculator
Calculate voltage drop in electrical conductors
Cable Ampacity Calculator
Calculate cable current carrying capacity
Illuminance Calculator
Calculate lighting levels for indoor spaces
Battery Capacity Calculator
Calculate battery size for backup power
💧 Fluid Mechanics
🏗️ Structural Engineering
⚠️ Disclaimer: All calculations on this website are for reference only. Do not use these results as the final basis for engineering design or construction. Please consult a licensed professional engineer for actual engineering decisions.