Try the Standard Deviation Calculator Widget
Free for any site, including commercial ones. Keep the small credit line at the bottom of the widget so readers can find the full version. Nothing is stored about the people who use it. See the disclaimer.
How to add it to your site
- Copy the code Use the copy button in the Embed code box so nothing is lost to line wrapping. It is a single iframe tag and it does not need anything else.
- Open the page you want it on In WordPress add a Custom HTML block, in Wix use the Embed HTML element, in Squarespace use a Code block, and on a hand-built site paste it straight into your HTML.
- Paste and publish The widget appears immediately. If you see an empty space instead, your editor has stripped the iframe tag, which the HTML embed guide explains how to work around.
- Adjust the look if you want to Add the parameters in the table below to the iframe URL to change the theme, the accent colour or the height. Nothing needs to be configured on our side.
Customisation options
| Parameter | Values | What it does |
|---|---|---|
theme | auto, light, dark | Default follows the reader's own system setting, so the widget looks right on a dark site and a light one without you choosing. |
accent | Six hex digits, e.g. accent=1A56DB | Recolours the header bar and the primary button to match your brand. |
header | 1 or 0 | Set to 0 to hide the title bar when your page already has a heading above the widget. |
breakdown | 1 or 0 | Set to 0 to hide the calculation breakdown for a more compact block. |
corners | 1 or 0 | Set to 0 for square corners if your design has no rounding anywhere else. |
width | full | Removes the 520px maximum so the widget stretches to its container. |
Parameters are added to the iframe URL as a normal query string, for example
/embed/standard-deviation-calculator.html?theme=dark&accent=1A56DB&header=0. The
widget builder lets you set all of them visually and hands you the finished code.
Why embed the Standard Deviation Calculator
Standard deviation underlies volatility, Bollinger Bands and every risk measure that follows, and readers rarely see it computed. The widget takes up to five data points and returns the mean, variance and standard deviation with the working shown. Finance education and statistics-for-traders content are the natural home.
What the widget calculates
This calculator works out the standard deviation, variance, and mean from your entered data points, using the sample standard deviation formula commonly applied to financial returns.
Enter up to five data points, and the calculator returns the mean, variance, and standard deviation, a foundational concept behind volatility measurement in trading.
The embedded version keeps the inputs and the result. The full Standard Deviation Calculator on TradeAnswers adds worked examples, the method behind the numbers and a long FAQ.
Who this widget suits
Charting and technical analysis blogs
Let readers see how the indicator is built from price instead of taking the platform output on trust.
Trading education sites
A live calculation next to the lesson shows exactly where the number comes from.
Trading communities and forums
A shared tool gives members a common reference point when they compare settings.
Related widgets
- RSI Calculator WidgetRSI Calculator
- Moving Average Calculator WidgetMoving Average Calculator
- MACD Calculator WidgetMACD Calculator
- Bollinger Bands Calculator WidgetBollinger Bands Calculator
The full library of free trading widgets has more than a hundred tools, and the widget builder lets you preview and configure any of them before you copy the code.