Free Engineering Tools

Engineering Calculators & Practical Tools

Use transparent engineering calculators and decision-support tools for maintenance, electrical systems, reliability, utilities and energy. Each tool shows its formulas, assumptions and limitations so the result can be checked rather than treated as a black box.

Available calculators

Three-Phase Power CalculatorCalculate kW, kVA and kVAr from line voltage, line current and power factor. Includes formulas, worked example and maintenance guidance.AVAILABLE MTBF, MTTR & Availability CalculatorCalculate reliability KPIs from operating time, qualifying failures and active repair time, with practical interpretation guidance.AVAILABLE Energy Cost & Simple Payback CalculatorEstimate annual energy use, operating cost, energy savings and simple payback from measured or assumed operating data.AVAILABLE

How to use these tools: calculator results are for learning, checking and preliminary engineering analysis. Approved design data, calibrated measurements, OEM information, applicable regulations, PTW/LOTO requirements and competent engineering review take priority for real equipment decisions.

Tool development roadmap

The academy is building the tool library gradually so each calculator remains useful, understandable and technically reviewable rather than publishing large numbers of thin tools.

ReliabilityMTBF, MTTR and availability calculator now available; additional maintenance KPI tools will follow where they add value.ACTIVE

Energy & CostEnergy consumption, annual operating cost, annual savings and simple payback calculator now available.ACTIVE

ElectricalPower factor relationships, kW/HP conversion and motor-current estimation guidance.PLANNED

MechanicalPump-power calculation guidance and common unit conversions for maintenance work.PLANNED

HVAC & UtilitiesAirflow, pressure, temperature and useful engineering unit-conversion tools.PLANNED

Maintenance KPIPlanned-maintenance completion and related KPI calculation aids.PLANNED

Related learning

VFD FundamentalsUnderstand drive operation, speed control and common troubleshooting checks. MTBF ExplainedLearn the reliability concept before using the reliability calculator. MTTR ExplainedUnderstand repair-time performance and how it is interpreted. Professional PPM ChecklistTurn engineering requirements into measurable maintenance tasks.