Explore engineering formulas and study tools

Find an equation, check what its variables mean, and work through an example. FormuLab brings formula lessons, concept guides, and calculation tools together for engineering students.

What you can use today

Engineering formula library
Browse formulas by subject, with interactive calculators, variable definitions, units, assumptions, examples, and source links on each lesson.
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Concept guides
Build context around the equations with short guides to the ideas used in mechanics, electricity, and other subjects.
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Formula Finder
Choose the quantity you need and the values you know to find matching relationships and see which inputs are missing.
Try the finder →
Unit Converter
Convert length, mass, temperature, pressure, force, and energy between common engineering units.
Convert units →
Scientific Calculator
Evaluate expressions with trigonometry, logarithms, powers, and a breakdown of the operations.
Open calculator →
Formula PDFs
Download an individual formula lesson as a PDF for offline study and reference.
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A practical way to study a formula

  1. 1. Start with the problem

    Identify the quantity requested and the values given. Use the Formula Finder if you are unsure which relationship applies.

  2. 2. Check the conditions

    Read the formula's assumptions, units, and variable definitions before substituting numbers.

  3. 3. Compare an example

    Follow a worked example, then check its cited source and review status before relying on it for coursework.

Frequently asked questions

Are the formulas expert reviewed?

Formula lessons show their source and review status. Pages marked “Needs review” have not yet been verified by a subject expert.

How do I find a formula?

Browse the formula library by subject or use the Formula Finder to start from known values.

Can I use the tools on a phone?

The formula pages and tools are designed to work on phones, tablets, and desktops.

Can I save a formula for offline study?

Open a formula lesson and select “Download PDF” to save that lesson.

Start with a formula

Explore the library or try a tool for your next problem set.

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