About this project

An independent project building free, accurate engineering calculators for drivers, students and enthusiasts.

How we build each tool

• Every formula cites a technical source you can check.
• Calculations live in a separate module covered by automated tests with hand-calculated reference values.
• Each tool states its limitations: what it assumes and what it does not model.
• Each page shows when it was published and when it was last reviewed.
• We do not publish made-up measurements, product tests or testimonials.

Report an error

If you find a mistake in a formula or a result, write to alvarohlb199@outlook.com with the values you entered and what you expected. Corrections are published with an updated review date.

Advertising and links

The site may show advertising in the future to cover its costs. Any affiliate links will be clearly labelled. Advertising never changes how a calculation works.