About AI Calculator

Mission

AI Calculator exists to give engineers, students, and professionals worldwide free access to accurate, standards-compliant calculation tools — without paywalls, account requirements, or data harvesting. Every calculator on this site implements a published formula from a recognized standard, with the source clearly cited so you can independently verify the math.

Standards we follow

Every engineering calculator is built directly from the formulas and procedures defined in the following internationally recognized standards. Where a calculator implements multiple standards (e.g. cable sizing per IEC 60364 and NEC), separate variants are provided so you choose the standard that applies in your jurisdiction.

How calculations are verified

Every calculator goes through a four-stage verification before publication:

1. Formula audit: The implementing JavaScript is reviewed against the source standard's published equation, including units, coefficients, and limit conditions.
2. Reference-case testing: Each calculator is tested against at least three worked examples from the standard itself or from authoritative engineering handbooks (IEEE, IEC handbook, NEC handbook, AISC Steel Construction Manual).
3. Boundary testing: Edge cases — extreme values, zero inputs, negative inputs, units at the limit of the standard's applicability — are tested to ensure the calculator either returns a sensible result or warns the user that the case is outside the validated range.
4. Cross-validation: Where commercially-available reference software exists (ETAP, SKM, Cymcap, RISA-3D), results are spot-checked against those tools to confirm agreement within standard tolerances.

Who built this

AI Calculator was founded and is currently maintained by Naveen P, an engineer with a background in electrical-systems design and a long-standing frustration with the state of free online calculators — most of which are either paywalled, ad-overloaded, or use unverified formulas without citation. The project began in early 2026 with a single calculator (cable sizing) and has grown to 157 calculators across 7 engineering disciplines.

Editorial principles

• Cite the standard. Every calculation page lists the source standard, edition, and section number where applicable.
• Show the work. Every calculator displays the formula being used. No black boxes.
• Disclose limitations. Every calculator includes a "When NOT to use this" section explaining the boundary of validity.
• No tracking of inputs. Calculator inputs are never transmitted off-device.
• No paywalls, ever. The site is funded entirely by Google AdSense; all calculators remain free.

What makes us different

Compared to other calculator sites on the web:

• vs. calculator.net: we go deeper on engineering specialty calculators (cable sizing per IEC, short-circuit per IEC 60909) where they go broad on consumer math.
• vs. omnicalculator.com: we cite the specific standard and section, not just the formula.
• vs. engineeringtoolbox.com: we provide the calculator widget alongside the reference table so you can compute, not just look up.
• vs. specialized engineering software: we're free, browser-based, and need no installation — perfect for site work, students, and quick verification.

Roadmap

Active development priorities for 2026:

• Expand each top-10 calculator to comprehensive guide-quality depth with worked examples.
• Add Spanish, Portuguese, and Hindi translations for the top 25 calculators.
• Add interactive step-by-step walk-throughs for complex calculations (e.g. cable sizing per IEC 60364-5-52).
• Add PDF export with branded headers and QR codes for site-survey use.
• Open-source the calculator engines so the engineering community can audit and contribute corrections.

Contact

Questions, corrections, suggestions, partnership inquiries, or "you got this formula wrong, here's the correct version" emails — all welcome.