Share KaTeX Formulas with Their Meaning Intact
Render a sample-mean formula, check its notation and worked example, and export a readable image with an accessible explanation.
A formula image is useful in a lesson, a technical post, or a slide when the destination cannot render your notation. Use Formula to Image for a focused expression. When the explanation and worked example belong in the same card, prepare the full Markdown in the converter.
The demonstration uses the arithmetic mean of a finite sample. Here, n is the number of observations, the indexed x values are the observations, and the bar marks their mean. For the values 2, 4, and 6, there are three observations and their sum is 12, so the mean is 4.
This small calculation is deliberate. It provides a result that an editor can verify independently of the renderer. A beautifully typeset formula can still contain the wrong denominator, missing index, or incorrect explanatory sentence.
The display-math delimiters place the equation on its own line, while the surrounding Markdown provides a heading and a worked result. The example is demonstration teaching material, not experimental data.
# Formula review
For a finite sample, the mean is:
$$
\bar{x} = \frac{1}{n}\sum_{i=1}^{n} x_i
$$
For **2, 4, 6**, the mean is **4**.
Use the output as a teaching card or a figure in a short explanation of averages. Compare the bar over x, the fraction, the summation limits, and the subscript with the source. Then confirm that the final result still matches the values described in the text.
If an expression does not render, check the opening and closing math delimiters first. Next check paired braces and the arguments belonging to fractions or indexed expressions. Start with the smallest failing expression rather than pasting a whole paper and changing several things together.
KaTeX supports a documented set of TeX functions; it is not a guarantee that every LaTeX package or custom macro will work. Consult the KaTeX supported-functions reference before relying on an unfamiliar command. If a source came from an AI answer, verify both the syntax and the mathematical claim.
Choose a display size that keeps subscripts, accents, and fraction lines distinct. A card that looks clear when enlarged may lose those details when inserted into a small slide area. Inspect the downloaded file at the intended size and leave enough space around the expression.
Keep the original expression in the editable document and include a plain-language explanation alongside the published image. Alt text should communicate the role of the equation and the worked result; an image alone does not make the mathematical content selectable or accessible to every reader.
Create a readable formula image after checking both the notation and the calculation.
Related guides: export Markdown as PNG and convert Markdown to PDF.