Multi-discipline engineering calculators, built for practice.
A self-contained suite of professional-grade interactive calculators for civil, mechanical, electrical, chemical, and industrial engineers. Each tool delivers real-time analysis with live visualizations, dual unit systems (SI / US), and code-compliance checks aligned with SADC regional standards (SATCC, SANS 10160).
Chemical Engineering
8 toolsCSTR Design
Continuous stirred-tank reactor (CSTR) design tool for first-order kinetics. Computes residence time, conversion, reactor volume, and effluent concentration from rate constant and feed conditions.
Orifice Flow Meter
ISO 5167 orifice plate flow meter calculator. Computes volumetric and mass flow rate from measured differential pressure, bore diameter, and discharge coefficient for liquids and gases.
PFR Design
Plug flow reactor (PFR) design tool for first-order kinetics. Computes required reactor volume, residence time, and axial concentration profile for given feed rate, conversion, and kinetics.
Process Pipe Sizing
Process pipe sizing tool. Calculates recommended nominal pipe diameter from design velocity or mass flow, evaluates Reynolds number, and checks frictional pressure drop per 100 m of pipe.
Sensible Heat Duty
Sensible heat duty calculator for process streams. Computes heat required to raise a fluid temperature using Cp, mass flow, and temperature change, with built-in Cp correlations for common fluids.
Heat Exchanger Sizing
Shell-and-tube heat exchanger sizing tool. Computes LMTD, correction factor, UA, and required heat transfer area for counter-flow, parallel-flow, and multi-pass arrangements.
Ideal Gas Calculator
Ideal gas law solver (PV = nRT). Computes any state variable from the other three, supports SI and US units, and evaluates density and specific volume for common engineering gases.
Pump System Analyst
Centrifugal pump and system curve analyst. Calculates head, brake horsepower, NPSH available, and operating point from static head, friction losses, and pump performance data.
Civil Engineering
5 toolsBeam Analyzer
Simply supported beam analysis using Euler-Bernoulli theory. Calculates reactions, shear forces, bending moments, and deflections for uniform and point loads.
Channel Flow Analyst
Open channel hydraulics using Manning's equation. Supports trapezoidal, rectangular, triangular, and circular cross-sections with SADC-calibrated roughness coefficients.
Curve Analyst
Horizontal alignment design tool for roadway curves. Computes radius, degree of curvature, tangent length, superelevation, and stopping sight distance based on design speed.
Runoff Analyst
Rational method peak discharge estimation with SADC IDF curves. Computes peak runoff, hydrograph volume, and design return period matching.
Sight Distance Analyst
AASHTO stopping sight distance calculator. Evaluates required sight distance from design speed, friction, grade, and driver reaction time, with SADC default parameters.
Electrical Engineering
5 toolsAC Load Calculator
Single-phase AC load analysis. Computes apparent/real/reactive power, current draw, power factor, and recommended overcurrent protection device (OCPD) sizing for residential and light-commercial branch circuits.
DC Circuit Solver
Ohm's Law and DC power calculator. Solves voltage, current, resistance, and power for series and parallel resistive networks, with conductor sizing guidance.
RC Transient Analyzer
First-order RC circuit response. Plots charging and discharging voltage/current curves against time, with time-constant and steady-state analysis.
Three‑Phase Power Analyzer
Balanced three-phase system analyzer. Computes line/phase quantities, real/reactive/apparent power, power factor correction, and required capacitor sizing for wye and delta loads.
Voltage Drop Calculator
NEC-compliant branch circuit voltage drop calculator. Estimates percent drop and adjusted receiving-end voltage for selected conductor sizes, materials, and circuit lengths.
Industrial Engineering
5 toolsProduction Capacity
Production capacity and bottleneck analyzer. Computes station utilization, throughput bottleneck, and theoretical capacity for multi-stage lines, highlighting the rate-limiting operation.
EOQ Calculator
Economic Order Quantity (EOQ) optimizer. Computes optimal order size, reorder point, cycle time, and total inventory cost from demand, holding, and ordering costs, with sensitivity analysis.
NIOSH Lifting Calculator
Revised NIOSH (1991) lifting equation calculator. Computes recommended weight limit (RWL), lifting index, and risk classification from horizontal, vertical, distance, asymmetry, frequency, and coupling multipliers.
Process Capability Calculator
Process capability (Cp, Cpk, Pp, Ppk) analyzer. Computes capability indices from sample statistics and spec limits, evaluates sigma level, and estimates expected defect rate (DPMO).
SPC X‑bar & R Chart
Statistical Process Control (SPC) X-bar and R chart builder. Computes control limits, plots sample means and ranges, and flags out-of-control points using Western Electric rules.
Mechanical Engineering
2 toolsCombined Stress Analyst
Mohr's circle and combined stress tool. Computes principal stresses, maximum shear, von Mises equivalent stress, and factor of safety for biaxial loading with custom material yield strengths.
Shaft Torsion Analyst
Torsion analyzer for solid and hollow circular shafts. Computes shear stress distribution, angle of twist, power transmission capacity, and stiffness for specified materials and geometries.
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Real-Time Computation
Every slider movement triggers instant recalculation and visualization. No submit buttons, no waiting.
Dual Unit Systems
Switch seamlessly between SI and US customary units. Inputs and outputs update together with full conversion.
Code Compliance Checks
Each tool includes a status badge, gauge, and detailed recommendation grounded in SADC engineering practice.
Interactive Visualizations
Hi-DPI canvas rendering with diagrams, plots, and schematic overviews. Print-ready reports included.