Industrial engineering calculators with project payback

Utilities, maintenance and production in one place. Every calculation shows the equations, assumptions and standards used, prints a PDF calculation report and, where savings are at stake, works out NPV, IRR and payback.

60 calculatorsMetric and imperial unitsASME, ISO, IEC, ASHRAE and DOE referencesPDF calculation report
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Little’s Law and flow efficiency

Build a value stream map with inventories and process times, then calculate lead time by Little’s Law, flow efficiency, critical WIP and the working capital freed by cutting work-in-process.

Open the calculator

Utilities

Steam, combustion and stacks, heat and fluids, compressed air, electrical and motors, hydraulics and oil, materials and tanks.

Steam & combustion

Steam tables, steam cost, fuels, boiler efficiency, blowdown, condensate, flue gas and stacks.

Heat & fluids

Thermal insulation, heat exchangers, piping, pumps and control valves.

Compressed air

Air and leak cost, distribution pressure drop and receiver volume.

Electrical & motors

Motors and drives, power factor, voltage drop and cable sizing, breakers and short circuit.

Hydraulics & oil

Oil viscosity, hydraulic cylinders, power unit heat and cooler sizing, and hydropneumatic tanks.

Materials & tanks

Weight and cost of plates, pipes and shapes; tank volume from level.

Maintenance

Reliability, downtime cost, preventive maintenance, spare parts and field predictive techniques.

Reliability & management

OEE, MTBF and MTTR, downtime cost, optimal preventive interval, redundancy, spare parts, life-cycle cost and maintenance KPIs.

Mechanical & electrical maintenance

Bearing life, vibration severity, thermography, bolt torque and shaft alignment.

Production & quality

Lean tools for flow, inventory and quality, with the financial gain of each improvement.

Flow & productivity

Takt time and line balancing, bottleneck, time study, staffing, SMED and lead time.

Inventory & replenishment

ABC/XYZ analysis, inventory turnover and carrying cost, economic lot size, safety stock, reorder point and kanban.

Costs & investments

Investment appraisal with income statement, NPV and IRR, machine hour cost, break-even, make or buy, equipment buy vs. lease and working capital.

Quality & Six Sigma

First pass yield, cost of poor quality and process capability (Cp, Cpk).

1. Enter your data

Every page opens with a worked example. Switch between metric and imperial units at any time.

2. Compare scenarios

Interactive charts show sensitivity to the key inputs and the cash flow of the improvement.

3. Document it

Print the report with inputs, results, equations and references, ready for review by a licensed engineer.