Try the Swap 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/swap-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 Swap Calculator
Overnight swap charges turn a flat trade into a losing one over weeks, and rand pairs carry some of the largest swaps in retail forex. The widget takes the position size, the swap rate in points and the nights held and returns the rand cost or credit. Broker comparison and carry trade content can show readers what holding a position actually costs.
What the widget calculates
A swap calculator shows the daily overnight financing cost (or credit) that your broker charges when you hold a leveraged CFD or forex position past the daily rollover time, typically 22:00 GMT. For South African traders, these costs are calculated in USD or the base currency and need to be converted to ZAR. This calculator shows daily, weekly, monthly, and annual swap cost in ZAR.
The embedded version keeps the inputs and the result. The full Swap Calculator on TradeAnswers adds worked examples, the method behind the numbers and a long FAQ.
Who this widget suits
Forex education sites
Drop it into the lesson it belongs to so readers can test their own pairs and sizes.
Finance blogs and newsletters
A working tool in a post gives readers a reason to return to that page.
Expat, travel and import sites
Rand-aware currency tools are hard to find; this one treats ZAR pairs as ordinary pairs.
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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.