Engineering and safety disclaimer
Last updated: August 27, 2026
These tools are educational and preliminary-analysis aids. They are not certified design, analysis, laboratory, medical, flight, structural, electrical-safety, or chemical-safety software, and no output from them has been reviewed or sealed by a licensed professional engineer.
What "preliminary" means here
A screening calculation tells you whether a design direction is worth pursuing. It does not tell you whether a design is safe, compliant, or buildable. The gap between the two is filled by installation method, material certification, load combinations, code requirements, environmental conditions, manufacturing tolerance, inspection, and professional judgement — none of which a browser calculator can see.
A concrete example: the wire-size tool reports current density in amperes per square millimetre. That is a useful way to compare conductor candidates. It is not ampacity. Ampacity depends on insulation temperature rating, installation method, ambient temperature, bundling, termination ratings, and the governing electrical code. A conductor that passes the current density screen can still be illegal and unsafe to install. Every tool on this site has an equivalent gap, and each one documents its own in its limitations section.
Independent verification is required
Before acting on any result, check formulas, constants, units, numerical precision, assumptions, boundary conditions, and applicability against course materials, published standards, manufacturers' data, or qualified professional review. Practical checks that catch most errors:
- Confirm the units of every input and every output, including whether a length is one-way or round-trip and whether an angle is degrees or radians.
- Read the tool's stated assumptions and confirm each one holds for your case. If one does not, the result does not apply.
- Run a limiting case with a known answer — zero load, infinite stiffness, a textbook value — and confirm the tool reproduces it.
- Check that the result scales the way the physics says it should when you double an input.
- Compare against an independent source: a second method, a reference table, or a hand calculation.
Do not use for safety-critical decisions
Do not rely on this website as the sole basis for any decision that could affect health, safety, property, regulatory compliance, or mission-critical systems. In particular, these tools must not be the basis for:
- Structural and civil work. Member sizing, foundation design, retaining structures, or anything carrying occupied load. Structural design requires code-based load combinations and a licensed engineer.
- Electrical installation. Conductor sizing, overcurrent protection, grounding, or arc-flash assessment. These are governed by electrical code and must be checked against it.
- Pressure, thermal, and rotating equipment. Vessel walls, piping under pressure, or shaft and bearing design where failure releases stored energy.
- Chemical handling. Reaction stoichiometry, thermochemistry, or equilibrium output used to plan a physical procedure. Consult safety data sheets and institutional protocols.
- Aerospace and flight. Trajectory, propulsion, or aerodynamic results used for anything that leaves the ground.
- Medical or biological application. None of these tools is a medical device and none is intended to inform clinical decisions.
- High-energy or radiological work. Nothing here models radiation shielding, criticality, or dose.
Where a discipline's tools carry explicit numerical safety bounds, those bounds are enforced in the calculation and stated on the tool page. Bounds being enforced does not make a result inside them safe; it only means the model was not asked to extrapolate.
Educational use
These tools are intended to support learning, not to replace it. They show intermediate quantities specifically so a student can follow the method rather than copy a number. Submitting tool output as your own worked solution is between you and your institution's academic-integrity policy; check it before you rely on these pages for graded work.
Reporting an error
If a result looks wrong, it may well be. Report it through thecontact form with the tool name, the values you entered, and the result you expected. Reports go to the engineer who maintains the calculation engines. Corrections are applied to the engine and its test suite so the same error cannot return.
For how results are calculated, validated, and sourced, see themethodology page. Theterms of use set out the warranty position and liability limits, and this disclaimer forms part of them. Questions can also be sent toneutronstudiogames@gmail.com.