Free Engineering Calculators and Fixed-Price Analysis
aNOWysis offers 251 free online calculators for engineers, analysts, and students, and fixed-price engineering analysis services from the same team. Every calculator writes out its equations with your numbers substituted, cites its sources, works in SI or US customary units, and reproduces a published example that you can check against the book.
Calculators by Area
- Structures91 toolsStress and strain, stability, beams, joints, fatigue, fracture, composites, and MIL-HDBK-5J allowables.
- Civil and Geotechnical16 toolsSteel connections, footings and retaining walls, and open-channel hydraulics.
- Mechanical Design22 toolsShafts, gears, bearings, springs, bolts, pressure vessels, tolerances, vibration, and noise.
- Fluids and Heat Transfer16 toolsPipe flow, conduction and thermal stress, and heat exchanger performance.
- Aerodynamics15 toolsRotor and ducted-fan design, performance, noise, and blade stress.
- Building Systems22 toolsHVAC loads, duct sizing, psychrometrics, fans, hydronics, ventilation, and energy savings.
- Quality10 toolsSPC and capability, gauge R&R, acceptance sampling, design of experiments, FMEA, and Pareto analysis.
- Reliability10 toolsWeibull and accelerated life, system reliability, fault trees, reliability growth, HALT and HASS, and solder-joint fatigue.
- Statistics12 toolsHypothesis tests, regression, distribution fitting, forecasting, surveys, uncertainty propagation, and probability.
- Operations Research9 toolsLinear programming, transportation problems, queueing, shift scheduling, inventory policy, and decision analysis.
- Project Management8 toolsCPM and PERT schedules, earned value, cost estimating, and cost risk.
- Finance and Business15 toolsValuation, depreciation, economic damages, loans and retirement, pricing, customer metrics, and loss reserving.
- Units5 toolsUnit conversion, unit-aware formula evaluation, and a significant-figures tutor.
Browse the full catalog or start from the worked examples, textbook and handbook problems solved step by step with the inputs to enter and the printed answers.
How the Calculators Work
- Equations shown, not hidden. Each result appears as the formula, the substituted values, and the answer, ready to paste into a report.
- Sources cited. Every tool lists the handbooks, standards, and papers its method comes from, and a method page explains the theory.
- Checked against published examples. The default inputs of each tool reproduce a worked example from the literature, and automated tests hold the tools to those printed answers.
- SI and US customary units on every input and result, with conversion handled for you.
- No account needed. A free profile adds saved inputs, materials, sections, and laminates.
Fixed-Price Analysis Services
When a calculator is not enough, our engineers perform the analysis for a price agreed before the work starts. You receive a report with the loads, methods, assumptions, and results documented, checked by finite element analysis and by the classical methods of Bruhn, Timoshenko, Peery, and Niu. Structural, stress, stability, joint, and finite element work are the core of the practice.
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About aNOWysis
aNOWysis has operated since 2015 and is backed by the aerospace and structural engineers of Avery Aerospace Corporation. The calculators began as the methods we use in our own work; they are published so that students can learn from them and practicing engineers can verify a design in minutes.