Quick Calculators

Comprehensive Tools for Mechanical, Thermal & Fluid Analysis

Professional engineering calculators for rotating equipment, process engineering & design

Our suite of free, offline engineering calculators provides instant solutions for pump head conversions, pressure drop analysis, thermal calculations, rotational dynamics, and more. All tools are built for engineers who need accurate results without external dependencies.

Rotational & Power Systems

Torque · Power · Speed

Relationships between mechanical power, torque, and rotational speed for motors, compressors, and turbines.

Electrical Power

Single-phase and three-phase motor power input, reactive power, and apparent power calculations.

Pump Head & Pressure

Convert between hydraulic head and pressure; calculate pump duty from head and flow.

Flow & Continuity

Continuity Equation

Solve Q = V × A for any variable; size pipes and calculate flow velocities in networks.

Darcy-Weisbach equation for major pressure losses with friction factor lookup for common pipe materials.

Reynolds Number

Classify flow as laminar, transitional, or turbulent; determine friction correlations and flow behavior.

Thermal & Structural Analysis

Heat Transfer Rate

Sensible heat, cooling loads, and heat exchanger duty using energy balance equations.

Stress from Pressure

Hoop, longitudinal, and shear stresses in thin-walled pressure vessels (cylinders & spheres).

Geometric & Rotational Calculations

Volume Calculator

Volumes for cylinders, spheres, rectangular tanks, pipes, and cones with flexible unit inputs.

Rotational Inertia

Moment of inertia for 5 rotor geometries and acceleration torque analysis for motor starting.