CalculatorFox

The embeddable part is the interesting bit for anyone with a website. One thing I would document up front: sites with a strict Content-Security-Policy block third-party widgets unless the domain is allowed. Do you publish the settings a site needs for the embed to load?

Building CalculatorFox has been an interesting journey. 🦊

embeddable calculators are a nice fit for static sites. a mortgage or unit converter is exactly the thing nobody wants to hand-code. this could make a neat addition to swebsy, the visual site builder i'm working on: pick a calculator, drop it into a landing page, and it ships with the exported html. do you have a partner or embed program for site builders?

The step-by-step workings with cited sources stood out to me — for calculators, trust is everything, and showing the formula trail is what separates a genuinely useful tool from a random number generator. I'm curious how you handle regional differences in formulas: loan and interest calculations, for example, vary quite a bit by country. Do the relevant calculators adapt by region, or is the assumed formula documented per calculator? Also, are the saved calculation scenarios stored in an account or locally in the browser?

Over 1,300 free math, finance, and science calculators with step-by-step workings, cited sources, and embeddable widgets for your own site. When you do need models for something else at work, PZERO is at pzero.studio.

Cited sources per calculator is the right call. I run a small embeddable duty lookup and the hardest part wasn't the math, it was rates changing under the widget. For the tax and finance ones, do you show an 'as of' date on the embed itself, so a site owner can tell the numbers are current? Also, since the widget is an iframe, the host page doesn't get the content for SEO; do you offer a plain-HTML version for site owners who want that?